[Federal Register Volume 71, Number 88 (Monday, May 8, 2006)]
[Proposed Rules]
[Pages 26707-26711]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E6-6905]



[[Page 26707]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2006-24010; Directorate Identifier 2006-CE-14-AD]
RIN 2120-AA64


Airworthiness Directives; Cirrus Design Corporation Model SR20 
and SR22 Airplanes

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

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) 
for certain Cirrus Design Corporation (CDC) Model SR20 and SR22 
airplanes. This proposed AD would require you to check the maintenance 
records to determine whether the brake caliper piston O-ring seals were 
replaced at the last annual or 100-hour inspection. If the O-rings were 
not replaced, this proposed AD would require you to replace the O-ring 
seals with new seals or replace brake calipers. This proposed AD would 
also require you to modify the main landing gear wheel fairings to add 
temperature indicator sticker inspection holes, trim the wheel fairings 
to prevent them from holding fluids, install temperature indicator 
stickers on the brake calipers, and insert Revision A6 (with revised 
preflight walk-around and taxi procedures) into the Pilot's Operating 
Handbook (POH). This proposed AD results from several reports of 
airplanes experiencing brake fires and two airplanes losing directional 
control. We are issuing this proposed AD to detect, correct, and 
prevent overheating damage to the brake caliper piston O-ring seals, 
which could result in leakage of brake hydraulic fluid. Consequently, 
this could lead to the loss of braking with loss of airplane 
directional control or brake fire.

DATES: We must receive comments on this proposed AD by July 10, 2006.

ADDRESSES: Use one of the following addresses to comment 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 20590-0001. 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.
    For service information identified in this proposed AD, contact 
Cirrus Design Corporation, 4515 Taylor Circle, Duluth, Minnesota 55811; 
telephone: (218) 727-2737 or on the Internet at http://www.cirrusdesign.com.
    You may examine the comments on this proposed AD in the AD docket 
on the Internet at http://dms.dot.gov.

FOR FURTHER INFORMATION CONTACT: Wess Rouse, Aerospace Engineer, ACE-
117C, Chicago Aircraft Certification Office, 2300 East Devon Avenue, 
Room 107, Des Plaines, Illinois 60018; telephone: (847) 294-8113; 
facsimile: (847) 294-7834.

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments regarding this proposal. Send your comments to an address 
listed under ADDRESSES. Include the docket number, ``FAA-2006-24010; 
Directorate Identifier 2006-CE-14-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 rulemaking. Using the search 
function of the DOT docket Web site, anyone can find and read the 
comments received into 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.).

Discussion

    The FAA recently received four reports of CDC Models SR20 and SR22 
airplanes experiencing brake fires and one airplane losing directional 
control resulting in contact with a parked airplane. There was one 
prior report of loss of directional control in 2002.
    Investigation has shown that with a free castering nose wheel, 
occasional right braking during taxi is necessary due to helical 
propwash. Excessive brake use during taxi can result in overheating 
damage of the O-ring seals on the right brake caliper piston. 
Consequently, the overheating damage of the O-ring seals on the brake 
caliper piston results in leakage of brake hydraulic fluid.
    In addition to excessive use of the right brake, data suggests that 
brake caliper piston O-ring seals have not typically been replaced at 
annual or 100-hour inspections as specified in the Aircraft Maintenance 
Manual (AMM).
    To address this unsafe condition, CDC has developed the following:
     Modifications to the main landing gear (MLG) wheel 
fairings to add temperature indicator sticker inspection holes and trim 
the wheel fairings to ensure that any leaking hydraulic fluid runs onto 
the pavement where it may be seen rather than collecting in the wheel 
pants;
     Temperature indicator stickers to install on brake 
calipers; and
     Revision A6 for the POH (with revised preflight walk-
around and taxi procedures).
    This condition, if not corrected, could cause leakage of brake 
hydraulic fluid and lead to the loss of braking with loss of airplane 
directional control or brake fire.

Relevant Service Information

    We have reviewed CDC Service Bulletins SB 2X-32-13, Issued: 
December 15, 2005; and SB 2X-32-14 R1, Issued: January 18, 2006, 
Revised: February 17, 2006.
    The service information describes procedures for:
     A wheel conversion and brake upgrade; and
     Modifications of the MLG fairings to include inspection 
holes that facilitate monitoring (temperature indicator stickers) for 
brake assembly temperature and trimming of the MLG fairings to provide 
for additional clearance;
     Installation of temperature indicator stickers on the 
brake assemblies; and
     Incorporation of Revision A6 into the POH.

FAA's Determination and Requirements of the Proposed AD

    We are proposing this AD to address an unsafe condition that we 
determined is likely to exist or develop on other products of this same 
type design. The proposed AD would require you to:
     Check the maintenance records to determine whether the 
brake caliper piston O-ring seals were replaced at the last annual or 
100-hour inspection, and,

[[Page 26708]]

if not replaced, replace the O-ring seals with new seals or replace 
brake calipers;
     Modify the MLG wheel fairings to add a temperature 
indicator sticker inspection hole;
     Trim the wheel fairings to prevent them from holding 
fluids;
     Install temperature indicator stickers on the brake 
calipers; and
     Insert Revision A6 into the POH.
    The proposed AD would require you to use the service information 
described previously to perform these actions.

Differences Between the Proposed AD and Service Information

    The proposed AD would require you to check the maintenance records 
to determine whether the brake caliper piston O-ring seals were 
replaced at the last annual or 100-hour inspection, and, if not 
replaced, would require you to replace the O-ring seals with new seals 
or replace brake calipers. This step is not included in the service 
bulletin. We include it in the proposed AD to assure the O-ring seals 
are replaced or have been recently replaced. Replacement procedures for 
the brake caliper piston O-ring seals are in Section 32-42 of the CDC 
Model SR20 or SR22 AMM. The requirements of the proposed AD, if adopted 
as a final rule, would take precedence over the provisions in the 
service information.

Costs of Compliance

    We estimate that this proposed AD affects 2,135 airplanes in the 
U.S. registry.
    We estimate the following costs to do this proposed check of 
maintenance records to determine whether the brake caliper piston O-
ring seals were replaced at the last annual or 100-hour inspection:

----------------------------------------------------------------------------------------------------------------
                                                       Total cost per
           Labor cost                  Parts cost         airplane            Total cost on U.S. operators
----------------------------------------------------------------------------------------------------------------
1 workhour x $80 = $80..........  Not applicable.....             $80  2,135 x $80 = $170,800.
----------------------------------------------------------------------------------------------------------------

    We estimate the following costs to install any necessary O-ring 
seals that would be required based on the results of this proposed 
check of maintenance records. We have no way of determining the number 
of airplanes that may need this seal installation:

------------------------------------------------------------------------
                                                          Total cost per
               Labor cost                   Parts cost       airplane
------------------------------------------------------------------------
4 work hours x $80 = $320...............              $8            $328
------------------------------------------------------------------------

    We estimate the following costs to replace any brake calipers on 
Model SR20 airplanes, serial numbers (S/Ns) 1005 through 1194, that 
would be required based on the results of this proposed check of 
maintenance records. We have no way of determining the number of these 
Model SR20 airplanes that may need to replace brake calipers:

------------------------------------------------------------------------
                                                          Total cost per
               Labor cost                   Parts cost       airplane
------------------------------------------------------------------------
12 workhours x $80 = $960...............          $1,167          $2,127
------------------------------------------------------------------------

    We estimate the following costs to replace any brake calipers on 
Model SR20 airplanes, S/Ns 1195 through 1600, that would be required 
based on the results of this proposed check of maintenance records. We 
have no way of determining the number of these Model SR20 airplanes 
that may need to replace brake calipers:

------------------------------------------------------------------------
                                                          Total cost per
               Labor cost                   Parts cost       airplane
------------------------------------------------------------------------
8 workhours x $80 = $640................          $1,167          $1,807
------------------------------------------------------------------------

    We estimate the following costs to replace any brake calipers on 
Model SR22 airplanes that would be required based on the results of 
this proposed check of maintenance records. We have no way of 
determining the number of Model SR22 airplanes that may need to replace 
brake calipers:

------------------------------------------------------------------------
                                                          Total cost per
               Labor cost                   Parts cost       airplane
------------------------------------------------------------------------
5 workhours x $80 = $400................            $845          $1,245
------------------------------------------------------------------------

    We estimate the following costs to do the proposed modification of 
the MLG wheel fairings to add the temperature indicator sticker 
inspection holes, trim the wheel fairings to prevent them from holding 
fluids, and install the temperature indicator sticker on the brake 
calipers:

[[Page 26709]]



----------------------------------------------------------------------------------------------------------------
                                                    Total cost per
            Labor cost                Parts cost       airplane             Total cost on U.S. operators
----------------------------------------------------------------------------------------------------------------
2 workhours x $80 = $160..........              $2            $162  2,135 x $162 = $345,870.
----------------------------------------------------------------------------------------------------------------

    The CDC has indicated that CDC will provide warranty credit as 
stated in the service information for modifying the MLG wheel fairings 
by adding the temperature indicator sticker inspection holes, trimming 
the wheel fairings to prevent them from holding fluids, and installing 
the temperature indicator sticker on the brake calipers.
    We estimate the following costs to do the proposed insertion of 
Revision A6 into the POH:

----------------------------------------------------------------------------------------------------------------
                                                                                  Total cost per   Total cost on
                  Labor cost                               Parts cost                airplane     U.S. operators
----------------------------------------------------------------------------------------------------------------
1 workhour x $80..............................  Not applicable..................             $80        $170,800
----------------------------------------------------------------------------------------------------------------

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. See the ADDRESSES section for a location 
to examine the regulatory evaluation.

Examining the Dockets

    You may examine the docket that contains the proposal, any comments 
received and any final disposition on the Internet at http://dms.dot.gov, or in person at the DOT Docket Offices between 9 a.m. and 
5 p.m., Monday through Friday, except Federal holidays. The Docket 
Office (telephone 1-800-647-5227) is located on the plaza level of the 
Department of Transportation Nassif Building at the street address 
stated in ADDRESSES. Comments will be available in the AD docket 
shortly after the Docket Management Facility receives them.

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 Federal Aviation Administration 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.


Sec.  39.13  [Amended]

    2. The FAA amends Sec.  39.13 by adding the following new 
airworthiness directive:

Cirrus Design Corporation: Docket No. FAA-2006-24010; Directorate 
Identifier 2006-CE-14-AD.

Comments Due Date

    (a) We must receive comments on this airworthiness directive 
(AD) action by July 10, 2006.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to the following airplane models and serial 
numbers (S/N) that are certificated in any category:
    (1) Group 1: Model SR20 Airplanes, S/N 1005 through 1600.
    (2) Group 2: Model SR22 Airplanes, S/N 0002 through 1739.
    (3) Group 3: Model SR20 Airplanes, S/N 1005 through 1592.
    (4) Group 4: Model SR22 Airplanes, S/N 0002 through 1727.

Unsafe Condition

    (d) This AD results from several reports of airplanes that 
experienced brake fires and two airplanes that lost directional 
control. The actions specified in this AD are intended to detect, 
correct, and prevent overheating damage to the brake caliper piston 
O-ring seals, which could result in leakage of brake hydraulic 
fluid. Consequently, this could lead to the loss of braking with 
loss of airplane directional control or brake fire.

Compliance

    (e) To address this problem, you must do the following:

[[Page 26710]]



                 Table 1.--Actions/Compliance/Procedures
------------------------------------------------------------------------
           Actions                 Compliance            Procedures
------------------------------------------------------------------------
(1) For Group 1 and Group 2   Within 50 hours time- No special
 Airplanes: Check the          in-service (TIS)      procedures
 maintenance records to        after the effective   necessary to check
 determine whether the brake   date of this AD,      the maintenance
 caliper piston O-ring seals   unless already done.  records. The owner/
 were replaced at the last                           operator holding at
 annual or 100-hour                                  least a private
 inspection.                                         pilot certificate
                                                     as authorized by
                                                     section 43.7 of the
                                                     Federal Aviation
                                                     Regulations (14 CFR
                                                     43.7) may make this
                                                     check. You must
                                                     make an entry into
                                                     the airplane
                                                     records that shows
                                                     compliance with
                                                     this portion of the
                                                     AD in accordance
                                                     with section 43.9
                                                     of the Federal
                                                     Aviation
                                                     Regulations (14 CFR
                                                     43.9).
(2) For Group 1 and Group 2   Before further        For the replacement,
 Airplanes: If you find as a   flight after the      brake maintenance
 result of the check           check required by     procedures are
 required by paragraph         paragraph (e)(1) of   included in Section
 (e)(1) of this AD that        this AD.              32-42 of the SR20
 there is no record of the                           or SR22 Aircraft
 replacement of brake                                Maintenance Manual.
 caliper piston O-ring seals                         For the replacement
 at the last annual or 100-                          of old brake
 hour inspection, then do                            calipers with new
 the following:                                      brake calipers,
(i) Replace the O-ring seals                         follow Cirrus
 with new O-ring seals; or                           Design Corporation
(ii) Replace old brake                               Service Bulletin SB
 calipers with new brake                             2X-32-13, Issued:
 calipers.                                           December 15, 2005.
(3) For Group 3 and Group 4   Do the modification   Follow Cirrus Design
 Airplanes:                    within 50 hours TIS   Corporation Service
(i) Modify the main landing    after the effective   Bulletin SB 2X-32-
 gear (MLG) wheel fairings     date of this AD,      14 R1, Issued:
 to add temperature            unless already        January 18, 2006,
 indicator sticker             done. Do the          Revised: February
 inspection holes and trim     temperature           17, 2006.
 the wheel fairings to         indicator sticker
 prevent them from holding     installation within
 fluids; and                   50 hours TIS after
(ii) Install a temperature     the effective date
 indicator sticker on the      of this AD, unless
 brake calipers.               already done, and
                               thereafter before
                               further flight
                               anytime you have
                               the o-ring seals
                               replaced due to
                               overheating of the
                               brake assembly
                               (temperature
                               indicator sticker
                               turned black).
(4) For all airplanes:        Within 50 hours TIS   The owner/operator
 Insert the appropriate        after the effective   holding at least a
 Revision A6 part number (P/   date of this AD,      private pilot
 N) into the Pilot's           unless already done.  certificate as
 Operating Handbook (POH),                           authorized by
 as presented in TABLE 2.--                          section 43.7 of the
 REVISION A6 TO THE PILOT'S                          Federal Aviation
 OPERATING HANDBOOK, in                              Regulations (14 CFR
 paragraph (f) of this AD..                          43.7) may insert
                                                     the information
                                                     into the POH as
                                                     specified in
                                                     paragraph (e)(4) of
                                                     this AD. Make an
                                                     entry into the
                                                     airplane
                                                     maintenance records
                                                     showing compliance
                                                     with this portion
                                                     of the AD in
                                                     accordance with
                                                     section 43.9 of the
                                                     Federal Aviation
                                                     Regulations (14 CFR
                                                     43.9).
(5) For Group 3 and Group 4   As of the effective   Follow Cirrus Design
 Airplanes:                    date of this AD.      Corporation Service
(i) Do not install any MLG                           Bulletin SB 2X-32-
 fairings without also doing                         14 R1, Issued:
 the modifications required                          January 18, 2006,
 by paragraph (e)(3)(i) of                           Revised: February
 this AD; and                                        17, 2006.
(ii) Do not replace any
 brake calipers without also
 installing the temperature
 indicator sticker required
 by paragraph (e)(3)(ii) of
 this AD.
------------------------------------------------------------------------

    (f) The following table specifies the POH Revision A6 part 
number as required in paragraph (e)(4) of this AD:

                             Table 2.--Revision A6 to the Pilot's Operating Handbook
----------------------------------------------------------------------------------------------------------------
                                                   Model SR20 or
               Affected airplanes                SR22 airplane POH                Date FAA-approved
                                                        P/N
----------------------------------------------------------------------------------------------------------------
(1) Model SR20, S/N 1148 through 1267..........          11934-002  January 18, 2006.
(2) Model SR20, S/N 1005 through 1147 that have          11934-002  January 18, 2006.
 the 3,000-pound gross weight modification
 following Cirrus Design Corporation Service
 Bulletin SB 20-01-00, Issued: February 25,
 2003.
(3) SR20, S/N 1268 through 1739................          11934-003  January 18, 2006.
(4) SR22, S/N 002 through 1739.................          13772-001  January 18, 2006.
----------------------------------------------------------------------------------------------------------------

Alternative Methods of Compliance (AMOCs)

    (g) The Manager, Chicago Aircraft Certification Office (ACO), 
ATTN: Wess Rouse, Aerospace Engineer, FAA, ACE-117C, Chicago ACO, 
2300 East Devon Avenue, Room 107, Des Plaines, Illinois 60018; 
telephone: (847) 294-8113; facsimile: (847) 294-7834, has the 
authority to approve alternative methods of compliance for this AD, 
if requested using the procedures found in 14 CFR 39.19.

[[Page 26711]]

Related Information

    (h) To get copies of the documents referenced in this AD, 
contact Cirrus Design Corporation, 4515 Taylor Circle, Duluth, 
Minnesota 55811; telephone: (218) 727-2737, or on the Internet at 
http://www.cirrusdesign.com. To view the AD docket, go to the Docket 
Management Facility; U.S. Department of Transportation, 400 Seventh 
Street, SW., Nassif Building, Room PL-401, Washington, DC, or on the 
Internet at http://dms.dot.gov. The docket number is Docket No. FAA-
2006-24010; Directorate Identifier 2006-CE-14-AD.

    Issued in Kansas City, Missouri, on May 1, 2006.
Steven W. Thompson,
Acting Manager, Small Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. E6-6905 Filed 5-5-06; 8:45 am]
BILLING CODE 4910-13-P