[Federal Register Volume 65, Number 145 (Thursday, July 27, 2000)]
[Proposed Rules]
[Pages 46211-46214]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 00-18397]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 2000-NM-33-AD]
RIN 2120-AA64


Airworthiness Directives; McDonnell Douglas Model MD-11 Series 
Airplanes

AGENCY: Federal Aviation Administration, DOT.

[[Page 46212]]


ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: This document proposes the adoption of a new airworthiness 
directive (AD) that is applicable to certain McDonnell Douglas Model 
MD-11 series airplanes. This proposal would require an inspection to 
detect chafing or damage of the electrical wires leading to the 
terminal strips in the center accessory compartment (CAC) area; and 
corrective actions, if necessary. This proposal also would require 
revising the wire connection stack up of certain cable terminals at the 
electrical power center bays in the CAC, and replacing certain terminal 
strips with new strips and removing applicable nameplates at electrical 
power center bays. This action is necessary to prevent arcing and 
sparking damage to the power feeder cables, terminal strips, and 
adjacent structure, and consequent smoke and fire in the CAC. This 
action is intended to address the identified unsafe condition.

DATES: Comments must be received by September 11, 2000.

ADDRESSES: Submit comments in triplicate to the Federal Aviation 
Administration (FAA), Transport Airplane Directorate, ANM-114, 
Attention: Rules Docket No. 2000-NM-33-AD, 1601 Lind Avenue, SW., 
Renton, Washington 98055-4056. Comments may be inspected at this 
location between 9 a.m. and 3 p.m., Monday through Friday, except 
Federal holidays. Comments may be submitted via fax to (425) 227-1232. 
Comments may also be sent via the Internet using the following address: 
[email protected]. Comments sent via fax or the Internet must 
contain ``Docket No. 2000-NM-33-AD'' in the subject line and need not 
be submitted in triplicate. Comments sent via the Internet as attached 
electronic files must be formatted in Microsoft Word 97 for Windows or 
ASCII text.
    The service information referenced in the proposed rule may be 
obtained from Boeing Commercial Aircraft Group, Long Beach Division, 
3855 Lakewood Boulevard, Long Beach, California 90846, Attention: 
Technical Publications Business Administration, Dept. C1-L51 (2-60). 
This information may be examined at the FAA, Transport Airplane 
Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, 
Transport Airplane Directorate, Los Angeles Aircraft Certification 
Office, 3960 Paramount Boulevard, Lakewood, California.

FOR FURTHER INFORMATION CONTACT: Brett Portwood, Aerospace Engineer, 
Systems and Equipment Branch, ANM-130L, FAA, Transport Airplane 
Directorate, Los Angeles Aircraft Certification Office, 3960 Paramount 
Boulevard, Lakewood, California 90712-4137; telephone (562) 627-5350; 
fax (562) 627-5210.

SUPPLEMENTARY INFORMATION:

Comments Invited

    Interested persons are invited to participate in the making of the 
proposed rule by submitting such written data, views, or arguments as 
they may desire. Communications shall identify the Rules Docket number 
and be submitted in triplicate to the address specified above. All 
communications received on or before the closing date for comments, 
specified above, will be considered before taking action on the 
proposed rule. The proposals contained in this notice may be changed in 
light of the comments received.
    Submit comments using the following format:
     Organize comments issue-by-issue. For example, discuss a 
request to change the compliance time and a request to change the 
service bulletin reference as two separate issues.
     For each issue, state what specific change to the proposed 
AD is being requested.
     Include justification (e.g., reasons or data) for each 
request.
    Comments are specifically invited on the overall regulatory, 
economic, environmental, and energy aspects of the proposed rule. All 
comments submitted will be available, both before and after the closing 
date for comments, in the Rules Docket for examination by interested 
persons. A report summarizing each FAA-public contact concerned with 
the substance of this proposal will be filed in the Rules Docket.
    Commenters wishing the FAA to acknowledge receipt of their comments 
submitted in response to this notice must submit a self-addressed, 
stamped postcard on which the following statement is made: ``Comments 
to Docket Number 2000-NM-33-AD.'' The postcard will be date stamped and 
returned to the commenter.

Availability of NPRMs

    Any person may obtain a copy of this NPRM by submitting a request 
to the FAA, Transport Airplane Directorate, ANM-114, Attention: Rules 
Docket No. 2000-NM-33-AD, 1601 Lind Avenue, SW., Renton, Washington 
98055-4056.

Discussion

    As part of its practice of re-examining all aspects of the service 
experience of a particular aircraft whenever an accident occurs, the 
FAA has become aware of an incident of arcing between a power feeder 
cable and terminal strip support bracket on a McDonnell Douglas Model 
MD-11 series airplane. Investigation revealed that the possibility 
exists for such arcing to occur throughout the airplane where power 
feeder cables are improperly stacked in conjunction with low base 
terminal strips. This condition, if not corrected, could result in 
arcing and sparking damage to the power feeder cables, terminal strips, 
and adjacent structure, and consequent smoke and fire in the center 
accessroy comparment (CAC).
    This incident is not considered to be related to an accident that 
occurred off the coast of Nova Scotia involving a McDonnell Douglas 
Model MD-11 series airplane. The cause of that accident is still under 
investigation.

Other Related Rulemaking

    The FAA, in conjunction with Boeing and operators of Model MD-11 
series airplanes, is continuing to review all aspects of the service 
history of those airplanes to identify potential unsafe conditions and 
to take appropriate corrective actions. This airworthiness directive 
(AD) is one of a series of actions identified during that process. The 
process is continuing and the FAA may consider additional rulemaking 
actions as further results of the review become available.

Explanation of Relevant Service Information

    The FAA has reviewed and approved McDonnell Douglas Alert Service 
Bulletin MD11-24A097, dated April 3, 2000, which describes the 
following procedures:
     Performing a one-time general visual inspection to detect 
chafing or damage of the electrical wires leading to the terminal 
strips in the center accessory compartment area; and corrective 
actions, if necessary. The corrective actions include replacing the 
terminal strip with a like part; sealing screw heads of replaced 
terminal strips; repairing damage; and replacing damaged wires with new 
wires.
     Revising the wire connection stack up of certain cable 
terminals at the electrical power center bays in the center accessory 
compartment.
     Replacing certain terminal strips with new strips and 
removing the applicable nameplate at electrical power center bays.

[[Page 46213]]

Explanation of Requirements of Proposed Rule

    Since an unsafe condition has been identified that is likely to 
exist or develop on other products of this same type design, the 
proposed AD would require accomplishment of the actions specified in 
the service bulletin described previously.

Cost Impact

    There are approximately 151 Model MD-11 series airplanes of the 
affected design in the worldwide fleet. The FAA estimates that 59 
airplanes of U.S. registry would be affected by this proposed AD, that 
it would take approximately between 6 and 8 work hours per airplane 
depending on the configuration of the airplane to accomplish the 
proposed actions, and that the average labor rate is $60 per work hour. 
Required parts would cost approximately between $1,091 and $1,256 per 
airplane depending on the configuration of the airplane. Based on these 
figures, the cost impact of the proposed AD on U.S. operators is 
estimated to be between $85,609 and $102,424, or between $1,451 and 
$1,736 per airplane.
    The cost impact figure discussed above is based on assumptions that 
no operator has yet accomplished any of the proposed requirements of 
this AD action, and that no operator would accomplish those actions in 
the future if this proposed AD were not adopted. The cost impact 
figures discussed in AD rulemaking actions represent only the time 
necessary to perform the specific actions actually required by the AD. 
These figures typically do not include incidental costs, such as the 
time required to gain access and close up, planning time, or time 
necessitated by other administrative actions.

Regulatory Impact

    The regulations proposed herein 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. Therefore, it 
is determined that this proposal would not have federalism implications 
under Executive Order 13132.
    For the reasons discussed above, I certify that this 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) if promulgated, 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. A copy of the draft 
regulatory evaluation prepared for this action is contained in the 
Rules Docket. A copy of it may be obtained by contacting the Rules 
Docket at the location provided under the caption ADDRESSES.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Safety.

The Proposed Amendment

    Accordingly, pursuant to the authority delegated to me by the 
Administrator, the Federal Aviation Administration proposes to amend 
part 39 of the Federal Aviation Regulations (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.


Sec. 39.13  [Amended]

    2. Section 39.13 is amended by adding the following new 
airworthiness directive:

McDonnell Douglas: Docket 2000-NM-33-AD.

    Applicability: Model MD-11 series airplanes, as listed in 
McDonnell Douglas Alert Service Bulletin MD11-24A097, dated April 3, 
2000; certificated in any category.

    Note 1: This AD applies to each airplane identified in the 
preceding applicability provision, regardless of whether it has been 
modified, altered, or repaired in the area subject to the 
requirements of this AD. For airplanes that have been modified, 
altered, or repaired so that the performance of the requirements of 
this AD is affected, the owner/operator must request approval for an 
alternative method of compliance in accordance with paragraph (d) of 
this AD. The request should include an assessment of the effect of 
the modification, alteration, or repair on the unsafe condition 
addressed by this AD; and, if the unsafe condition has not been 
eliminated, the request should include specific proposed actions to 
address it.

    Compliance: Required as indicated, unless accomplished 
previously.
    To prevent arcing and sparking damage to the power feeder 
cables, terminal strips, and adjacent structure, and consequent 
smoke and fire in the center accessory compartment, accomplish the 
following:

Inspection

    (a) Within 12 months after the effective date of this AD, 
perform a one-time general visual inspection to detect chafing or 
damage of the electrical wires leading to the terminal strips in the 
center accessory compartment area, in accordance with McDonnell 
Douglas Alert Service Bulletin MD11-24A097, dated April 3, 2000.

    Note 2: For the purposes of this AD, a general visual inspection 
is defined as ``A visual examination of an interior or exterior 
area, installation, or assembly to detect obvious damage, failure, 
or irregularity. This level of inspection is made under normally 
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.''

Condition 1 (No Chafing or Damage)

    (1) If no chafing or damage is detected, no further action is 
required by this paragraph.

Condition 2 (Evidence of Chafing or Damage on Terminal Strips)

    (2) If any chafing or damage is detected on the terminal strips, 
before further flight, replace the terminal strip with a like part 
and seal screw heads of replaced terminal strips, in accordance with 
the service bulletin.

Condition 3 (Chafing or Damage Within Limits)

    (3) If any chafing is detected and if any damage is detected 
within the limits specified in the service bulletin, before further 
flight, repair damage in accordance with the service bulletin.

Condition 4 (Chafing or Damage Beyond Limits)

    (4) If any chafing is detected and if any damage is detected 
beyond the limits specified in the service bulletin, before further 
flight, replace damaged wires with new wires in accordance with the 
service bulletin.

Revise Wire Connection of the Cable Terminal Strips

    (b) Within 12 months after the effective date of this AD, revise 
the wire connection stack up of certain cable terminals at the 
electrical power center bays in the center accessory compartment in 
accordance with McDonnell Douglas Alert Service Bulletin MD11-
24A097, dated April 3, 2000.

Replacement of Terminal Strips and Removal of Namplate

    (c) Within 12 months after the effective date of this AD, 
replace the terminal strips with new strips and remove the 
applicable nameplate at electrical power center bays in the center 
accessory compartment, in accordance with McDonnell Douglas Alert 
Service Bulletin MD11-24A097, dated April 3, 2000.

Alternative Methods of Compliance

    (d) An alternative method of compliance or adjustment of the 
compliance time that provides an acceptable level of safety may be 
used if approved by the Manager, Los Angeles Aircraft Certification 
Office (ACO), FAA, Transport Airplane Directorate. Operators shall 
submit their requests through an appropriate FAA Principal 
Maintenance Inspector, who may add comments and then send it to the 
Manager, Los Angeles ACO.

    Note 3: Information concerning the existence of approved 
alternative methods of

[[Page 46214]]

compliance with this AD, if any, may be obtained from the Los 
Angeles ACO.

Special Flight Permit

    (e) Special flight permits may be issued in accordance with 
sections 21.197 and 21.199 of the Federal Aviation Regulations (14 
CFR 21.197 and 21.199) to operate the airplane to a location where 
the requirements of this AD can be accomplished.

    Issued in Renton, Washington, on July 14, 2000.
John J. Hickey,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 00-18397 Filed 7-26-00; 8:45 am]
BILLING CODE 4910-13-U