[Federal Register Volume 72, Number 12 (Friday, January 19, 2007)]
[Proposed Rules]
[Pages 2475-2480]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E7-708]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2007-26864; Directorate Identifier 2006-NM-228-AD]
RIN 2120-AA64


Airworthiness Directives; Boeing Model 737-200, -300, -400, -500, 
-600, -700, -800, and -900 Series Airplanes; Boeing Model 757-200 and -
300 Series Airplanes; and McDonnell Douglas Model DC-10-10, DC-10-10F, 
DC-10-30, DC-10-30F, DC-10-40, MD-10-30F, MD-11, and MD-11F Airplanes; 
Equipped With Reinforced Flight Deck Doors Installed in Accordance With 
Supplemental Type Certificate (STC) ST01335LA, STC ST01334LA, and STC 
ST01391LA, Respectively

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: The FAA proposes to supersede an existing airworthiness 
directive (AD) that applies to certain transport category airplanes 
identified above. The existing AD currently requires modification of 
the reinforced flight deck door and other actions related to the 
reinforced flight deck door. Those other actions include modifying the 
door, inspecting and modifying wiring in the area, and revising the 
maintenance program to require more frequent testing of the 
decompression panels of the flight deck door. This proposed AD would 
add airplanes to the existing requirement of a one-time inspection for 
chafing of wire bundles in the area of the flight deck door and 
corrective actions if necessary. This proposed AD would remove certain 
airplanes from the applicability. This proposed AD results from a 
report of smoke and fumes in the cockpit of a Model 737-300 series 
airplane. We are proposing this AD to prevent inadvertent release of 
the decompression latch and consequent opening of the decompression 
panel in the flight deck door, or penetration of the flight deck door 
by smoke or shrapnel, any of which could result in injury to the 
airplane flightcrew. We are also proposing this AD to detect and 
correct wire chafing, which could result in arcing, fire, and/or 
reduced controllability of the airplane.

DATES: We must receive comments on this proposed AD by March 5, 2007.

ADDRESSES: Use one of the following addresses to submit comments on 
this proposed AD.
     DOT Docket Web site: Go to  http://dms.dot.gov and follow 
the instructions for sending your comments electronically.
     Government-wide rulemaking Web site: Go to http://www.regulations.gov and follow the instructions for sending your 
comments electronically.
     Mail: Docket Management Facility; U.S. Department of 
Transportation, 400 Seventh Street, SW., Nassif Building, Room PL-401, 
Washington, DC 20590.
     Fax: (202) 493-2251.
     Hand Delivery: Room PL-401 on the plaza level of the 
Nassif Building, 400 Seventh Street, SW., Washington, DC, between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle, 
Washington 98124-2207; Boeing Commercial Airplanes, Long Beach

[[Page 2476]]

Division, 3855 Lakewood Boulevard, Long Beach, California 90846, 
Attention: Data and Service Management, Dept. C1-L5A (D800-0024); or 
C&D Aerospace, 5701 Bolsa Avenue, Huntington Beach, California 92647-
2063; for service information identified in this proposed AD.

FOR FURTHER INFORMATION CONTACT: Ron Atmur, Aerospace Engineer, 
Airframe Branch, ANM-120L, FAA, Los Angeles Aircraft Certification 
Office, 3960 Paramount Boulevard, Lakewood, California 90712-4137; 
telephone (562) 627-5224; fax (562) 627-5210.

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite you to submit any relevant written data, views, or 
arguments regarding this proposed AD. Send your comments to an address 
listed in the ADDRESSES section. Include the docket number ``Docket No. 
FAA-2007-26864; Directorate Identifier 2006-NM-228-AD'' at the 
beginning of your comments. We specifically invite comments on the 
overall regulatory, economic, environmental, and energy aspects of the 
proposed AD. We will consider all comments received by the closing date 
and may amend the proposed AD in light of those comments.
    We will post all comments we receive, without change, to http://dms.dot.gov, including any personal information you provide. We will 
also post a report summarizing each substantive verbal contact with FAA 
personnel concerning this proposed AD. Using the search function of 
that Web site, anyone can find and read the comments in any of our 
dockets, including the name of the individual who sent the comment (or 
signed the comment on behalf of an association, business, labor union, 
etc.). You may review the DOT's complete Privacy Act Statement in the 
Federal Register published on April 11, 2000 (65 FR 19477-78), or visit 
http://dms.dot.gov.

Examining the Docket

    You may examine the AD docket on the Internet at http://dms.dot.gov, or in person at the Docket Management Facility office 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The Docket Management Facility office (telephone (800) 647-
5227) is located on the plaza level of the Nassif Building at the DOT 
street address stated in the ADDRESSES section. Comments will be 
available in the AD docket shortly after the Docket Management System 
receives them.

Discussion

    On May 26, 2005, we issued AD 2005-12-05, amendment 39-14121 (70 FR 
37152, June 28, 2005). That AD applies to certain Boeing Model 737-200, 
-300, -400, -500, -600, -700, -800, and -900 series airplanes; Boeing 
Model 757-200 and -300 series airplanes; and McDonnell Douglas Model 
DC-10-10, DC-10-10F, DC-10-30, DC-10-30F, DC-10-40, MD-10-10F, MD-10-
30F, MD-11, and MD-11F airplanes. That AD requires modification of the 
reinforced flight deck door and other actions related to the reinforced 
flight deck door. Those other actions include modifying the door, 
inspecting and modifying wiring in the area, and revising the 
maintenance program to require more frequent testing of the 
decompression panels of the flight deck door. That AD resulted from 
reports of discrepancies with the reinforced flight deck door. We 
issued that AD to prevent inadvertent release of the decompression 
latch and consequent opening of the decompression panel in the flight 
deck door, or penetration of the flight deck door by smoke or shrapnel, 
any of which could result in injury to the airplane flightcrew. That AD 
also requires finding and fixing wire chafing, which could result in 
arcing, fire, and/or reduced controllability of the airplane.

Actions Since Existing AD Was Issued

    Since we issued AD 2005-12-05, we have received a report indicating 
that a Boeing Model 737-300 series airplane was forced to turn back to 
the airport ten minutes after departure, due to smoke and fumes in the 
cockpit of the airplane. Investigation revealed that the incident was 
caused by a certain wire, aft of the overhead P5 panel of the cockpit, 
chafing against a bracket for a certain plug disconnect, which had been 
installed during modification of the flight deck door lock in 
accordance with Supplemental Type Certificate (STC) ST01335LA. Chafing 
of wiring in the area of the flight deck door, if not corrected, could 
result in arcing, fire, and/or reduced controllability of the airplane. 
Previously, we addressed this unsafe condition in paragraph (m)(2) of 
AD 2005-12-05 for Model 737-200 series airplanes equipped with flight 
deck door assembly part number (P/N) B221001. That paragraph refers to 
C&D Aerospace Alert Service Bulletin B221001-52A02, dated November 5, 
2002, as the appropriate source of service information for doing a 
general visual inspection for chafing of wire bundles in the area of 
the flight deck door and doing corrective actions if necessary. (Boeing 
Model 737-300, -400, and -500 series airplanes are included in the 
effectivity of C&D Aerospace Alert Service Bulletin B221001-52A02.) We 
have determined that the same unsafe condition also exists on Model 
737-300, -400, and -500 series airplanes equipped with reinforced 
flight deck door assembly P/N B221001. Since Model 737-300, -400, and -
500 series airplanes were included in the applicability of AD 2005-12-
05, this proposed AD does not expand the applicability. Rather, this 
proposed AD would require additional action on those airplanes to 
adequately address the unsafe condition.
    We inadvertently included McDonnell Douglas Model MD-10-10F 
airplanes in the applicability of AD 2005-12-05. The affected 
reinforced flight deck doors are not approved for installation on Model 
MD-10-10F airplanes under any STC. Therefore, we have removed those 
airplanes from the applicability of this proposed AD.

FAA's Determination and Requirements of the Proposed AD

    We have evaluated all pertinent information and identified an 
unsafe condition that is likely to develop on other products of the 
same type design. For this reason, we are proposing this AD, which 
would supersede AD 2005-12-05 and would retain the requirements of the 
existing AD. For Model 737-300, -400, and -500 series airplanes, this 
proposed AD would also require accomplishing the actions specified in 
C&D Aerospace Alert Service Bulletin B221001-52A02, dated November 5, 
2002, except as discussed under ``Difference Between the Proposed AD 
and Service Bulletin.''

Difference Between the Proposed AD and Service Bulletin

    Although C&D Aerospace Alert Service Bulletin B221001-52A02 
describes procedures for installing a placard to show that the service 
bulletin has been accomplished, this proposed AD does not require that 
action. We have revised paragraph (m)(2) of the proposed AD to exclude 
that action.

Costs of Compliance

    There are about 3,423 airplanes of the affected design in the 
worldwide fleet. For the new proposed action, there are about 1,047 
Model 737-300, -400, and -500 series airplanes of the affected design 
in the worldwide fleet. The following table provides the estimated 
costs, at an average labor rate of $80 per work hour, for U.S. 
operators to comply with this proposed AD.

[[Page 2477]]



                                                                     Estimated Costs
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                                 Number of
                                                                                                                     Cost per      U.S.-
                     Action                                       Model                   Work hours     Parts       airplane    registered   Fleet cost
                                                                                                                                 airplanes
--------------------------------------------------------------------------------------------------------------------------------------------------------
Modification in paragraph (f) of the proposed    737-200, -300, -400, -500, -600, -700,            1       \1\ $0          $80        1,040      $83,200
 AD (required by AD 2005-12-05).                  -800, and -900 series airplanes, with
                                                  flight deck door assembly P/N B221001.
                                                 757-200 and -300 series airplanes,                2        \1\ 0          160          519       83,040
                                                  with flight deck door assembly P/N
                                                  B231001.
                                                 DC-10-10F, DC-10-30, DC-10-30F, DC-10-            2        \1\ 0          160           21        3,360
                                                  40, MD-10-30F, MD-11, and MD-11F
                                                  airplanes, with flight deck door
                                                  assembly P/N B211200.
Revision in paragraph (i) of the proposed AD     757-200 and -300 series airplanes.....            1         None           80          651       52,080
 (required by AD 2005-12-05).
                                                 737-200, -300, -400, -500, -600, -700,            1        \1\ 0           80        1,673      133,840
                                                  -800, and -900 series airplanes; and
                                                  757-200 and -300 series airplanes;
                                                  with flight deck door assembly P/N
                                                  B221200.
Modification in paragraph (j) of the proposed    DC-10-10, DC-10-10F, DC-10-30, DC-10-             1        \1\ 0           80          155       12,400
 AD (required by AD 2005-12-05).                  30F, DC-10-40, MD-10-30F, MD-11, and
                                                  MD-11F airplanes, with flight deck
                                                  door assembly P/N B211200.
                                                 MD-11 and MD-11F airplanes, with                  1        \1\ 0           80            6          480
                                                  flight deck door assembly P/N B251200.
Wiring rework in paragraph (m)(1) of the         737-200 series airplanes, with flight             1         None           80          134       10,720
 proposed AD (required by AD 2005-12-05).         deck door assembly P/N B221001.
Inspection in paragraph (m)(2) of the proposed   737-200 series airplanes, with flight             2         None          160          134       21,440
 AD (required by AD 2005-12-05).                  deck door assembly P/N B221001.
Inspection in paragraph (o) of the proposed AD   737-300, -400, -500 series airplanes,             2         None          160          529      84,640
 (new proposed action).                           with flight deck door assembly P/N
                                                  B221001.
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ The parts manufacturer states that it will supply required parts to operators at no cost.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, Section 106, describes the 
authority of the FAA Administrator. Subtitle VII, Aviation Programs, 
describes in more detail the scope of the Agency's authority.
    We are issuing this rulemaking under the authority described in 
Subtitle VII, Part A, Subpart III, Section 44701, ``General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.

Regulatory Findings

    We have determined that this proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would not 
have a substantial direct effect on the States, on the relationship 
between the national Government and the States, or on the distribution 
of power and responsibilities among the various levels of government.
    For the reasons discussed above, I certify that the proposed 
regulation:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866;
    2. Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979); and
    3. Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.
    We prepared a regulatory evaluation of the estimated costs to 
comply with this proposed AD and placed it in the AD docket. See the 
ADDRESSES section for a location to examine the regulatory evaluation.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Safety.

The Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

    1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.

[[Page 2478]]

Sec.  39.13  [Amended]

    2. The Federal Aviation Administration (FAA) amends Sec.  39.13 by 
removing amendment 39-14121 (70 FR 37152, June 28, 2005) and adding the 
following new airworthiness directive (AD):

Boeing and McDonnell Douglas: Docket No. FAA-2007-26864; Directorate 
Identifier 2006-NM-228-AD.

Comments Due Date

    (a) The FAA must receive comments on this AD action by March 5, 
2007.

Affected ADs

    (b) This AD supersedes AD 2005-12-05.

Applicability

    (c) This AD applies to airplanes identified in Table 1 of this 
AD, certificated in any category.

                                             Table 1.--Applicability
----------------------------------------------------------------------------------------------------------------
                                                                               Equipped with C&D Zodiac, Inc.
                                                                                reinforced flight deck doors
          Airplane manufacturer                    Airplane model               installed in accordance with
                                                                             Supplemental Type Certificate (STC)
----------------------------------------------------------------------------------------------------------------
Boeing..................................  737-200, -300, -400, -500, -600,  ST01335LA.
                                           -700, -800, and -900 series
                                           airplanes.
Boeing..................................  757-200 and -300 series           ST01334LA.
                                           airplanes.
McDonnell Douglas.......................  DC-10-10, DC-10-10F, DC-10-30,    ST01391LA.
                                           DC-10-30F, DC-10-40, MD-10-30F,
                                           MD-11, and MD-11F airplanes.
----------------------------------------------------------------------------------------------------------------

Unsafe Condition

    (d) This AD results from a report of smoke and fumes in the 
cockpit of a Model 737-300 series airplane. We are issuing this AD 
to prevent inadvertent release of the decompression latch and 
consequent opening of the decompression panel in the flight deck 
door, or penetration of the flight deck door by smoke or shrapnel, 
any of which could result in injury to the airplane flightcrew. We 
are also issuing this AD to detect and correct wire chafing, which 
could result in arcing, fire, and/or reduced controllability of the 
airplane.

Compliance

    (e) You are responsible for having the actions required by this 
AD performed within the compliance times specified, unless the 
actions have already been done.

Restatement of Requirements of AD 2005-12-05

    Note 1: Where there are differences between this AD and the 
referenced service bulletins, this AD prevails.

Modification

    (f) For airplanes listed in Table 2 of this AD: Within 90 days 
after July 25, 2003 (the effective date of AD 2003-14-04, amendment 
39-13223), modify the reinforced flight deck door according to 
paragraph (f)(1), (f)(2), or (f)(3) of this AD, as applicable. (AD 
2003-14-04 was superseded by AD 2005-12-05.)

   Table 2.--Airplane Models Subject to Requirements of AD 2003-14-04
------------------------------------------------------------------------
                                                      Identified in C&D
   Airplane manufacturer        Airplane models       Aerospace Service
                                                          Bulletin
------------------------------------------------------------------------
Boeing.....................  737-200, -300, -400, - B221001-52-03,
                              500, -600, -700, -     Revision 3, dated
                              800, and -900 series   March 25, 2003.
                              airplanes.
Boeing.....................  757-200 and -300       B231001-52-02,
                              series airplanes.      Revision 4, dated
                                                     March 19, 2003.
McDonnell Douglas..........  DC-10-10F, DC-10-30,   B211200-52-02,
                              DC-10-30F, DC-10-40,   Revision 1, dated
                              MD-10-30F, MD-11,      June 3, 2003.
                              and MD-11F airplanes.
------------------------------------------------------------------------

    (1) For Boeing Model 737-200, -300, -400, -500, -600, -700, -
800, and -900 series airplanes: Modify the upper and lower pressure 
relief latch assemblies on the flight deck door by doing all actions 
specified in and according to paragraphs 3.A., 3.B., and 3.C. of the 
Accomplishment Instructions of C&D Aerospace Service Bulletin 
B221001-52-03, Revision 3, dated March 25, 2003. One latch strap 
should be installed at the bottom of the upper pressure relief 
assembly, and a second latch strap should be installed at the top of 
the lower pressure relief assembly. When properly installed, the 
strap should cover a portion of the latch hook.
    (2) For Boeing Model 757-200 and -300 series airplanes: Modify 
the upper and lower pressure relief latch assemblies on the flight 
deck door by doing all actions specified in and according to 
paragraphs 3.A., 3.B., and 3.C. of the Accomplishment Instructions 
of C&D Aerospace Service Bulletin B231001-52-02, Revision 4, dated 
March 19, 2003. One latch strap should be installed at the bottom of 
the upper pressure relief assembly, and a second latch strap should 
be installed at the top of the lower pressure relief assembly. When 
properly installed, the strap should cover a portion of the latch 
hook.
    (3) For McDonnell Douglas DC-10-10F, DC-10-30, DC-10-30F, DC-10-
40, MD-10-30F, MD-11, and MD-11F airplanes: Install spacers in the 
upper and lower pressure relief latch assemblies of the flight deck 
door, by doing all actions specified in and according to paragraphs 
3.A., 3.C., and 3.D. of C&D Aerospace Service Bulletin B211200-52-
02, Revision 1, dated June 3, 2003; or Revision 2, dated September 
29, 2003.

Modifications Accomplished Per Previous Issues of Service Bulletin

    (g) For airplanes listed in Table 2 of this AD: Modifications 
accomplished before July 25, 2003, in accordance with a service 
bulletin listed in paragraph (g)(1), (g)(2), or (g)(3) of this AD; 
as applicable; are considered acceptable for compliance with the 
corresponding action specified in paragraph (f) of this AD.
    (1) For Boeing Model 737-200, -300, -400, -500, -600, -700, -
800, and -900 series airplanes: C&D Aerospace Service Bulletin 
B221001-52-03, dated December 6, 2002; Revision 1, dated January 2, 
2003; or Revision 2, dated February 20, 2003.
    (2) For Boeing Model 757-200 and -300 series airplanes: C&D 
Aerospace Service Bulletin B231001-52-02, dated December 6, 2002; 
Revision 1, dated January 2, 2003; Revision 2, dated February 20, 
2003; or Revision 3, dated March 7, 2003.
    (3) For McDonnell Douglas DC-10-10F, DC-10-30, DC-10-30F, DC-10-
40, MD-10-30F, MD-11, and MD-11F airplanes: C&D Aerospace Service 
Bulletin B211200-52-02, dated April 30, 2003.

Parts Installation

    (h) As of July 25, 2003, no person may install, on any airplane, 
a reinforced flight deck door having any part number (P/N) listed in 
paragraph 1.A. of C&D Aerospace Service Bulletin B221001-52-03, 
Revision 3, dated March 25, 2003; B231001-52-02,

[[Page 2479]]

Revision 4, dated March 19, 2003; or B211200-52-02, Revision 1, 
dated June 3, 2003; as applicable; unless the door has been modified 
as required by paragraph (f) of this AD.

Model 737 and 757 Series Airplanes: Revise Maintenance Program

    (i) For Boeing Model 737-200, -300, -400, -500, -600, -700, -
800, and -900 series airplanes; and Model 757-200 and -300 series 
airplanes: Within 6 months after July 19, 2005 (the effective date 
of AD 2005-12-05), revise the FAA-approved maintenance inspection 
program to include the information specified in C&D Aerospace Report 
CDRB22-69, Revision E, dated November 8, 2002.

Modifications to Flight Deck Door

    (j) Modify the reinforced flight deck door by doing all 
applicable actions specified in the applicable service bulletin 
listed in Table 3 of this AD at the applicable compliance time 
specified in that table. Where the applicable service bulletin 
includes an instruction to install a placard to show that the 
service bulletin has been accomplished, this AD does not require 
that action.

                               Table 3.--New Modifications to the Flight Deck Door
----------------------------------------------------------------------------------------------------------------
                                      Equipped with a flight  Within this compliance     Do all actions in the
         For these Models--             deck door assembly      time after July 19,         Accomplishment
                                        having this P/N--             2005--               Instructions of--
----------------------------------------------------------------------------------------------------------------
McDonnell Douglas Model DC-10-10,    B211200................  6 months..............  C&D Aerospace Service
 DC-10-10F, DC-10-30, DC-10-30F, DC-                                                   Bulletin B211200-52-01,
 10-40, MD-10-30F, MD-11, and MD-                                                      Revision 3, dated
 11F airplanes.                                                                        September 18, 2003.
McDonnell Douglas Model MD-11 and    B251200................  6 months..............  C&D Aerospace Service
 MD-11F airplanes.                                                                     Bulletin B251200-52-01,
                                                                                       dated April 30, 2003.
Boeing Model 737-200, -300, -400, -  B221200................  18 months.............  C&D Aerospace Service
 500, -600, -700, -800, and -900                                                       Bulletin B221200-52-01,
 series airplanes; and Model 757-                                                      Revision 1, dated June
 200 and -300 series airplanes.                                                        27, 2003.
Boeing Model 737-200, -300, -400, -  B221001................  18 months.............  C&D Aerospace Service
 500, -600, -700, -800, and -900                                                       Bulletin B221001-52-03,
 series airplanes.                                                                     Revision 3, dated March
                                                                                       25, 2003; except as
                                                                                       provided by paragraph (k)
                                                                                       of this AD.
Boeing Model 757-200 and -300        B231001................  18 months.............  C&D Aerospace Service
 series airplanes.                                                                     Bulletin B231001-52-02,
                                                                                       Revision 4, dated March
                                                                                       19, 2003; except as
                                                                                       provided by paragraph (k)
                                                                                       of this AD.
McDonnell Douglas DC-10-10, DC-10-   B211200................  18 months.............  C&D Aerospace Service
 10F, DC-10-30, DC-10-30F, DC-10-                                                      Bulletin B211200-52-02,
 40, MD-10-30F, MD-11, and MD-11F                                                      Revision 1, dated June 3,
 airplanes.                                                                            2003; or Revision 2,
                                                                                       dated September 29, 2003;
                                                                                       except as provided by
                                                                                       paragraph (k) of this AD.
----------------------------------------------------------------------------------------------------------------

    (k) For airplanes subject to paragraph (f) of this AD: Actions 
required by paragraph (f) of this AD that were done within the 
compliance time specified in paragraph (f) of this AD do not need to 
be repeated in accordance with paragraph (j) of this AD.

Modifications Accomplished Per Previous Issues of Service Bulletin

    (l) Modifications accomplished before July 19, 2005, in 
accordance with an applicable service bulletin listed in Table 4 of 
this AD are considered acceptable for compliance with the 
corresponding action specified in paragraph (j) of this AD.

   Table 4.--Acceptable Service Information for Previous Modifications
------------------------------------------------------------------------
      Service Bulletin         Revision level             Date
------------------------------------------------------------------------
C&D Aerospace Service         Original........  February 27, 2003.
 Bulletin B211200-52-01.
C&D Aerospace Service         1...............  March 7, 2003.
 Bulletin B211200-52-01.
C&D Aerospace Service         2...............  June 3, 2003.
 Bulletin B211200-52-01.
C&D Aerospace Service         Original........  April 30, 2003.
 Bulletin B211200-52-02.
C&D Aerospace Service         Original........  December 6, 2002.
 Bulletin B221001-52-03.
C&D Aerospace Service         1...............  January 2, 2003.
 Bulletin B221001-52-03.
C&D Aerospace Service         2...............  February 20, 2003.
 Bulletin B221001-52-03.
C&D Aerospace Service         Original........  April 30, 2003.
 Bulletin B221200-52-01.
C&D Aerospace Service         Original........  December 6, 2002.
 Bulletin B231001-52-02.
 
C&D Aerospace Service         1...............  January 2, 2003.
 Bulletin B231001-52-02.
C&D Aerospace Service         2...............  February 20, 2003.
 Bulletin B231001-52-02.
C&D Aerospace Service         3...............  March 7, 2003.
 Bulletin B231001-52-02.
------------------------------------------------------------------------

Model 737-200 Series Airplanes: Wiring Modification/Inspection

    (m) For Boeing Model 737-200 series airplanes equipped with 
flight deck door assembly P/N B221001: Within 18 months after July 
19, 2005, do paragraphs (m)(1) and (m)(2) of this AD.
    (1) Rework the wiring for the flight deck door to relocate a 
power wire for the flight deck door, in accordance with the 
Accomplishment Instructions of C&D Aerospace Alert Service Bulletin 
B221001-52A05, Revision 3, dated October 3, 2003. Actions 
accomplished before July 19, 2005, in accordance with C&D Aerospace 
Alert Service Bulletin B221001-52A05, dated April 17, 2003; Revision 
1, dated May 14, 2003; or Revision 2, dated June 19, 2003; are 
acceptable for compliance with the corresponding action required by 
this paragraph.
    (2) Perform a general visual inspection for chafing of wire 
bundles in the area of the

[[Page 2480]]

flight deck door and applicable corrective actions by doing all of 
the actions in the Accomplishment Instructions of C&D Aerospace 
Alert Service Bulletin B221001-52A02, dated November 5, 2002; except 
where the service bulletin specifies installing a placard, this AD 
does not require that action. Any applicable corrective actions must 
be done before further flight.

    Note 2: For the purposes of this AD, a general visual inspection 
is ``a visual examination of a interior or exterior area, 
installation or assembly to detect obvious damage, failure or 
irregularity. This level of inspection is made from within touching 
distance unless otherwise specified. A mirror may be necessary to 
ensure visual access to all surfaces in the inspection area. This 
level of inspection is made under normal available lighting 
conditions such as daylight, hangar lighting, flashlight or drop-
light and may require removal or opening of access panels or doors. 
Stands, ladders or platforms may be required to gain proximity to 
the area being checked.''

Parts Installation

    (n) As of July 19, 2005, no person may install a reinforced 
flight deck door under any STC listed in Table 1 of this AD, on any 
airplane, unless all applicable requirements of this AD have been 
done on the door.

New Requirements of This AD

Inspection and Corrective Actions if Necessary for Certain 
Airplanes

    (o) For Boeing Model 737-300, -400, and -500 series airplanes 
equipped with flight deck door assembly P/N B221001: Within 18 
months after the effective date of this AD, do the actions specified 
in paragraph (m)(2) of this AD.

Alternative Methods of Compliance (AMOCs)

    (p)(1) The Manager, Los Angeles Aircraft Certification Office, 
FAA, has the authority to approve AMOCs for this AD, if requested in 
accordance with the procedures found in 14 CFR 39.19.
    (2) Before using any AMOC approved in accordance with Sec.  
39.19 on any airplane to which the AMOC applies, notify the 
appropriate principal inspector in the FAA Flight Standards 
Certificate Holding District Office.
    (3) AMOCs approved previously in accordance with AD 2005-12-05 
are approved as AMOCs for the corresponding provisions of this AD.

    Issued in Renton, Washington, on December 26, 2006.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. E7-708 Filed 1-18-07; 8:45 am]
BILLING CODE 4910-13-P