Airworthiness Directives; Robert E. Rust, Jr. Model DeHavilland DH.C1 Chipmunk 21, DH.C1 Chipmunk 22, and DH.C1 Chipmunk 22A Airplanes, 53861-53863 [2010-21741]

Download as PDF Federal Register / Vol. 75, No. 170 / Thursday, September 2, 2010 / Rules and Regulations responsibilities among the various levels of government. For the reasons discussed above, I certify that the 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 an economic evaluation of the estimated costs to comply with this AD. See the AD docket to examine the economic evaluation. 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. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. Adoption of the Amendment Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows: ■ emcdonald on DSK2BSOYB1PROD with RULES 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. § 39.13 [Amended] 2. Section 39.13 is amended by adding a new airworthiness directive to read as follows: ■ VerDate Mar<15>2010 18:14 Sep 01, 2010 Jkt 220001 2010–12–51 AGUSTA S.p.A.: Amendment 39–16409. Docket No. FAA–2010–0824; Directorate Identifier 2010–SW–045–AD. Applicability: Model A119 and AW119 MKII helicopters, with a 90-degree tail rotor gearbox (TGB), part number (P/N) 109–0440– 06–103, installed, certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent abnormal vibration and damage to the tail rotor system, loss of the yaw control function, and subsequent loss of control of the helicopter, do the following: (a) Before further flight, remove the forward boot, P/N 109–0135–10, from the hub-locking nut (nut), P/N 109–0135–12, as shown in Figure 1 of Agusta Alert Bollettino Tecnico No. 119–38, dated March 25, 2010 (ABT). (1) Insert a 0.3 millimeter (mm) thickness gauge, not exceeding 10 mm in width, between the tail rotor control rod (rod) and the nut as shown in Figure 2 of the ABT until the gauge stops. (2) From the face of the nut, measure the depth the gauge is inserted between the rod and the nut before it stops: (i) If the depth measurement is between 4 mm and 6 mm, the bushing, P/N 109–0135– 14–101, is installed. Within 5 hours time-in service, reidentify the TGB, P/N 109–0440– 06–103, by using an etch pen to change the last three digits of the P/N from –103 to –105. Note 1: Installing a new nameplate by following the Compliance Instructions, Part II, of the ABT satisfies the reidentification requirements of the TGB P/N in paragraph (a)(2)(i) of this AD. (ii) If the depth measurement is greater than 6 mm, before further flight, replace the TGB, P/N 109–0440–06–103, with TGB, P/N 109–0440–06–105, and replace the associated parts listed in the Accomplishment Instructions, Part I, paragraph 4, of the ABT with the associated parts listed in the Accomplishment Instructions, Part I, paragraph 5, of the ABT. (b) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Contact the Manager, Safety Management Group, FAA, ATTN: Eric Haight, Aviation Safety Engineer, FAA, Rotorcraft Directorate, Regulations and Guidance Group, 2601 Meacham Blvd., Fort Worth, Texas 76137, telephone (817) 222– 5204, fax (817) 222–5961, for information about previously approved alternative methods of compliance. (c) The Joint Aircraft System/Component (JASC) Code is 6520: Tail Rotor Gearbox. (d) Replacing the associated parts and removing the boot, and measuring the insertion depth of the gauge shall be done by following the specified portions of Agusta Alert Bollettino Tecnico No. 119–38, dated March 25, 2010. The Director of the Federal Register approved this incorporation by reference in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Agusta, Via Giovanni Agusta, 520 21017 Cascina Costa di Samarate (VA), Italy, telephone 39 0331–229111, fax 39 0331– 229605/222595, or at https://customersupport. agusta.com/technical_advice.php. Copies PO 00000 Frm 00021 Fmt 4700 Sfmt 4700 53861 may be inspected at the FAA, Office of the Regional Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, Fort Worth, Texas, or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202–741–6030, or go to: https://www.archives.gov/federal_register/ code_of_federal_regulations/ibr_locations. html. (e) This amendment becomes effective on September 17, 2010, to all persons except those persons to whom it was made immediately effective by Emergency AD 2010–12–51, issued June 1, 2010, which contained the requirements of this amendment. Note 2: The subject of this AD is addressed in the European Aviation Safety Agency Emergency AD No. 2010–0059–E, dated March 26, 2010. Issued in Fort Worth, Texas, on August 12, 2010. Mark R. Schilling, Acting Manager, Rotorcraft Directorate, Aircraft Certification Service. [FR Doc. 2010–21593 Filed 9–1–10; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2010–0632; Directorate Identifier 2010–CE–025–AD; Amendment 39–16426; AD 2010–18–01] RIN 2120–AA64 Airworthiness Directives; Robert E. Rust, Jr. Model DeHavilland DH.C1 Chipmunk 21, DH.C1 Chipmunk 22, and DH.C1 Chipmunk 22A Airplanes Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule. AGENCY: We are adopting a new airworthiness directive (AD) for all Robert E. Rust, Jr. Models DeHavilland DH.C1 Chipmunk 21, DH.C1 Chipmunk 22, and DH.C1 Chipmunk 22A airplanes. This AD requires you to do a one-time inspection of the flap operating system for an unapproved latch plate design installation, with replacement as necessary. This AD results from a report of a latch plate failing in service that was not made in accordance with the applicable de Havilland drawing. We are issuing this AD to detect and correct an unauthorized latch plate design installation which could result in an uncommanded retraction of the flaps. This failure could lead to a stall during a landing approach. SUMMARY: E:\FR\FM\02SER1.SGM 02SER1 53862 Federal Register / Vol. 75, No. 170 / Thursday, September 2, 2010 / Rules and Regulations This AD becomes effective on October 7, 2010. On October 7, 2010, the Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD. ADDRESSES: For service information identified in this AD, contact de Havilland Support Limited, Duxford Airfield, Cambridgeshire, CB22 4QR, England, phone: +44 (0) 1223 830090; fax: +44 (0) 1223 830085; e-mail: info@dhsupport.com; Internet: https:// www.dhsupport.com/. To view the AD docket, go to U.S. Department of Transportation, Docket Operations, M–30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue, SE., Washington, DC 20590, or on the Internet at https:// www.regulations.gov. The docket number is FAA–2010–0632; Directorate Identifier 2010–CE–025–AD. FOR FURTHER INFORMATION CONTACT: Carey O’Kelley, Aerospace Engineer, FAA, Atlanta Aircraft Certification DATES: Office (ACO), 1701 Columbia Avenue, College Park, Georgia 30337; telephone: (404) 474–5543; fax: (404) 474–5606. SUPPLEMENTARY INFORMATION: Discussion On June 14, 2010, we issued a proposal to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) to include an AD that would apply to all Robert E. Rust, Jr. Models DeHavilland DH.C1 Chipmunk 21, DH.C1 Chipmunk 22, and DH.C1 Chipmunk 22A airplanes. This proposal was published in the Federal Register as a notice of proposed rulemaking (NPRM) on June 21, 2010 (75 FR 34956). The NPRM proposed to require a one-time inspection of the flap operating system for an unapproved latch plate design installation with replacement as necessary. Comments We provided the public the opportunity to participate in developing this AD. We received no comments on the proposal or on the determination of the cost to the public. Conclusion We have carefully reviewed the available data and determined that air safety and the public interest require adopting the AD as proposed except for minor editorial corrections. We have determined that these minor corrections: • Are consistent with the intent that was proposed in the NPRM for correcting the unsafe condition; and • Do not add any additional burden upon the public than was already proposed in the NPRM. Costs of Compliance We estimate that this AD affects 64 airplanes in the U.S. registry. We estimate the following costs to do the inspection: Labor cost Parts cost Total cost per airplane Total cost on U.S. operators 3 work-hours × $85 per hour = $255 .............................................................. Not Applicable .................................... $255 $16,320 We estimate the following costs to do any necessary replacements that would be required based on the results of the inspection. We have no way of determining the number of airplanes that may need this replacement: Labor cost Parts cost Total cost per airplane .5 work-hour × $85 per hour = $42.50 ............................................................................................................................ $175 $217.50 emcdonald on DSK2BSOYB1PROD with RULES 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 AD. VerDate Mar<15>2010 18:14 Sep 01, 2010 Jkt 220001 Regulatory Findings We have determined that this AD will not have federalism implications under Executive Order 13132. This AD will 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 this AD: 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 summary of the costs to comply with this AD (and other information as included in the Regulatory Evaluation) and placed it in PO 00000 Frm 00022 Fmt 4700 Sfmt 4700 the AD Docket. You may get a copy of this summary by sending a request to us at the address listed under ADDRESSES. Include ‘‘Docket No. FAA–2010–0632; Directorate Identifier 2010–CE–025–AD’’ in your request. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the Federal Aviation Administration amends 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. E:\FR\FM\02SER1.SGM 02SER1 Federal Register / Vol. 75, No. 170 / Thursday, September 2, 2010 / Rules and Regulations § 39.13 [Amended] 2. FAA amends § 39.13 by adding the following new AD: ■ 2010–18–01 Robert E. Rust, Jr.: Amendment 39–16426; Docket No. FAA–2010–0632; Directorate Identifier 2010–CE–025–AD. Effective Date (a) This AD becomes effective on October 7, 2010. Affected ADs (b) None. and DH.C1 Chipmunk 22A airplanes, all serial numbers, that are certificated in any category. Note: These airplanes are also identified as CHIPMUNK 22A, CHIPMUNK DHC–1T10, CHIPMUNK T.10 MK–22, DH.C1 MK22A, DHC–1, DHC–1 CHIPMUNK, DHC–1 CHIPMUNK 22, DHC–1 SERIES 22, or DHC– 1 T.MK. 10. Subject (d) Air Transport Association of America (ATA) Code 27: Flight Controls. 53863 question was not manufactured to the applicable de Havilland drawing. The unapproved latch plate was made of a shaft that was pressed into a plate, rather than being machined from bar material as one piece. The shaft and plate on the unapproved part can become separated or bent, resulting in rapid wear and failure of the part. This condition, if not corrected, could result in an un-commanded retraction of the flaps. This failure could lead to a stall during a landing approach. Unsafe Condition Applicability (c) This AD applies to Models DeHavilland DH.C1 Chipmunk 21, DH.C1 Chipmunk 22, Compliance (e) This AD results from a report of a latch plate supplied under part number (P/N) C1– CF–1489 failing in service. The part in (f) To address this problem, you must do the following, unless already done: Actions Compliance Procedures (1) Inspect the flap operating system to identify the P/N of the latch plate installed. If latch plate P/N C1–CF–1489 is installed, inspect the latch plate to determine if it is in compliance with the design standard. An unapproved latch plate P/N C1–CF–1489 is made from two pieces pressed together while one that complies with the design standard is machined in one piece from bar material. (2) If during the inspection required in paragraph (f)(1) of this AD an unapproved latch plate P/N C1–CF–1489 is found, replace the latch plate with a latch plate that complies with the design standard. The following U.S. standard hardware may be substituted for the hardware specified in the service information: (i) 1/16’’ diameter cotter pin that is P/N MS24665–153 (or equivalent) in place of split pin P/N SP90/C; and (ii) Washer that is P/N MS15795–806B (or equivalent) in place of washer P/N SP13/ B. Within 50 hours time-in-service (TIS) after October 7, 2010 (the effective date of this AD) or within 90 days after October 7, 2010 (the effective date of this AD), whichever occurs first. Follow de Havilland Support Limited Technical News Sheet (TNS) CT(C1) No 208 Issue 1, dated January 30, 2009. Before further flight after the inspection where the unapproved latch plate P/N C1–CF– 1849 was found. Follow de Havilland Support Limited TNS CT(C1) No 208 Issue 1, dated January 30, 2009. CB22 4QR, England, phone: +44 (0) 1223 830090; fax: +44 (0) 1223 830085; e-mail: info@dhsupport.com; Internet: https:// www.dhsupport.com/. (3) You may review copies of the service information incorporated by reference for this AD at the FAA, Central Region, Office of the Regional Counsel, 901 Locust, Kansas City, Missouri 64106. For information on the availability of this material at the Central Region, call (816) 329–3768. (4) You may also review copies of the service information incorporated by reference for this AD at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741–6030, or go to: https://www.archives.gov/federal_register/ code_of_federal_regulations/ ibr_locations.html. DEPARTMENT OF TRANSPORTATION emcdonald on DSK2BSOYB1PROD with RULES Alternative Methods of Compliance (AMOCs) (g) The Manager, Atlanta Aircraft Certification Office (ACO), FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Send information to ATTN: Carey O’Kelley, Aerospace Engineer, FAA, Atlanta ACO, 1701 Columbia Avenue, College Park, Georgia 30337; telephone: (404) 474–5543; fax: (404) 474–5606. Before using any approved AMOC on any airplane to which the AMOC applies, notify your appropriate principal inspector (PI) in the FAA Flight Standards District Office (FSDO), or lacking a PI, your local FSDO. Material Incorporated by Reference (h) You must use de Havilland Support Limited TNS CT(C1) No 208 Issue 1, dated January 30, 2009, to do the actions required by this AD, unless the AD specifies otherwise. (1) The Director of the Federal Register approved the incorporation by reference of this service information under 5 U.S.C. 552(a) and 1 CFR part 51. (2) For service information identified in this AD, contact de Havilland Support Limited, Duxford Airfield, Cambridgeshire, VerDate Mar<15>2010 18:14 Sep 01, 2010 Jkt 220001 Issued in Kansas City, Missouri, on August 25, 2010. John R. Colomy, Acting Manager, Small Airplane Directorate, Aircraft Certification Service. [FR Doc. 2010–21741 Filed 9–1–10; 8:45 am] BILLING CODE 4910–13–P PO 00000 Frm 00023 Fmt 4700 Sfmt 4700 Federal Aviation Administration 14 CFR Part 73 [Docket No. FAA–2010–0693; Airspace Docket No. 10–ASW–6] RIN 2120–AA66 Amendment of Restricted Area R– 5113; Socorro, NM Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: This action changes the using agency of Restricted Area R–5113, Socorro, NM, to ‘‘U.S. Air Force, Air Force Research Laboratory.’’ There are no changes to the boundaries; designated altitudes; time of designation; or activities conducted within the affected restricted area. DATES: Effective date 0901 UTC, November 18, 2010. SUMMARY: E:\FR\FM\02SER1.SGM 02SER1

Agencies

[Federal Register Volume 75, Number 170 (Thursday, September 2, 2010)]
[Rules and Regulations]
[Pages 53861-53863]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2010-21741]


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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2010-0632; Directorate Identifier 2010-CE-025-AD; 
Amendment 39-16426; AD 2010-18-01]
RIN 2120-AA64


Airworthiness Directives; Robert E. Rust, Jr. Model DeHavilland 
DH.C1 Chipmunk 21, DH.C1 Chipmunk 22, and DH.C1 Chipmunk 22A Airplanes

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

ACTION: Final rule.

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

SUMMARY: We are adopting a new airworthiness directive (AD) for all 
Robert E. Rust, Jr. Models DeHavilland DH.C1 Chipmunk 21, DH.C1 
Chipmunk 22, and DH.C1 Chipmunk 22A airplanes. This AD requires you to 
do a one-time inspection of the flap operating system for an unapproved 
latch plate design installation, with replacement as necessary. This AD 
results from a report of a latch plate failing in service that was not 
made in accordance with the applicable de Havilland drawing. We are 
issuing this AD to detect and correct an unauthorized latch plate 
design installation which could result in an un-commanded retraction of 
the flaps. This failure could lead to a stall during a landing 
approach.

[[Page 53862]]


DATES: This AD becomes effective on October 7, 2010.
    On October 7, 2010, the Director of the Federal Register approved 
the incorporation by reference of certain publications listed in this 
AD.

ADDRESSES: For service information identified in this AD, contact de 
Havilland Support Limited, Duxford Airfield, Cambridgeshire, CB22 4QR, 
England, phone: +44 (0) 1223 830090; fax: +44 (0) 1223 830085; e-mail: 
info@dhsupport.com; Internet: https://www.dhsupport.com/.
    To view the AD docket, go to U.S. Department of Transportation, 
Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 
New Jersey Avenue, SE., Washington, DC 20590, or on the Internet at 
https://www.regulations.gov. The docket number is FAA-2010-0632; 
Directorate Identifier 2010-CE-025-AD.

FOR FURTHER INFORMATION CONTACT: Carey O'Kelley, Aerospace Engineer, 
FAA, Atlanta Aircraft Certification Office (ACO), 1701 Columbia Avenue, 
College Park, Georgia 30337; telephone: (404) 474-5543; fax: (404) 474-
5606.

SUPPLEMENTARY INFORMATION:

Discussion

    On June 14, 2010, we issued a proposal to amend part 39 of the 
Federal Aviation Regulations (14 CFR part 39) to include an AD that 
would apply to all Robert E. Rust, Jr. Models DeHavilland DH.C1 
Chipmunk 21, DH.C1 Chipmunk 22, and DH.C1 Chipmunk 22A airplanes. This 
proposal was published in the Federal Register as a notice of proposed 
rulemaking (NPRM) on June 21, 2010 (75 FR 34956). The NPRM proposed to 
require a one-time inspection of the flap operating system for an 
unapproved latch plate design installation with replacement as 
necessary.

Comments

    We provided the public the opportunity to participate in developing 
this AD. We received no comments on the proposal or on the 
determination of the cost to the public.

Conclusion

    We have carefully reviewed the available data and determined that 
air safety and the public interest require adopting the AD as proposed 
except for minor editorial corrections. We have determined that these 
minor corrections:
     Are consistent with the intent that was proposed in the 
NPRM for correcting the unsafe condition; and
     Do not add any additional burden upon the public than was 
already proposed in the NPRM.

Costs of Compliance

    We estimate that this AD affects 64 airplanes in the U.S. registry.
    We estimate the following costs to do the inspection:

----------------------------------------------------------------------------------------------------------------
                                                                                                     Total cost
                   Labor cost                                 Parts cost               Total cost      on U.S.
                                                                                      per airplane    operators
----------------------------------------------------------------------------------------------------------------
3 work-hours x $85 per hour = $255..............  Not Applicable....................         $255       $16,320
----------------------------------------------------------------------------------------------------------------

    We estimate the following costs to do any necessary replacements 
that would be required based on the results of the inspection. We have 
no way of determining the number of airplanes that may need this 
replacement:

------------------------------------------------------------------------
                                                             Total cost
                 Labor cost                    Parts cost   per airplane
------------------------------------------------------------------------
.5 work-hour x $85 per hour = $42.50........         $175       $217.50
------------------------------------------------------------------------

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 AD.

Regulatory Findings

    We have determined that this AD will not have federalism 
implications under Executive Order 13132. This AD will 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 this AD:
    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 summary of the costs to comply with this AD (and 
other information as included in the Regulatory Evaluation) and placed 
it in the AD Docket. You may get a copy of this summary by sending a 
request to us at the address listed under ADDRESSES. Include ``Docket 
No. FAA-2010-0632; Directorate Identifier 2010-CE-025-AD'' in your 
request.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the Federal Aviation Administration amends 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.

[[Page 53863]]

Sec.  39.13  [Amended]

0
2. FAA amends Sec.  39.13 by adding the following new AD:

2010-18-01 Robert E. Rust, Jr.: Amendment 39-16426; Docket No. FAA-
2010-0632; Directorate Identifier 2010-CE-025-AD.

Effective Date

    (a) This AD becomes effective on October 7, 2010.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Models DeHavilland DH.C1 Chipmunk 21, 
DH.C1 Chipmunk 22, and DH.C1 Chipmunk 22A airplanes, all serial 
numbers, that are certificated in any category.

    Note:  These airplanes are also identified as CHIPMUNK 22A, 
CHIPMUNK DHC-1T10, CHIPMUNK T.10 MK-22, DH.C1 MK22A, DHC-1, DHC-1 
CHIPMUNK, DHC-1 CHIPMUNK 22, DHC-1 SERIES 22, or DHC-1 T.MK. 10.

Subject

    (d) Air Transport Association of America (ATA) Code 27: Flight 
Controls.

Unsafe Condition

    (e) This AD results from a report of a latch plate supplied 
under part number (P/N) C1-CF-1489 failing in service. The part in 
question was not manufactured to the applicable de Havilland 
drawing. The unapproved latch plate was made of a shaft that was 
pressed into a plate, rather than being machined from bar material 
as one piece. The shaft and plate on the unapproved part can become 
separated or bent, resulting in rapid wear and failure of the part. 
This condition, if not corrected, could result in an un-commanded 
retraction of the flaps. This failure could lead to a stall during a 
landing approach.

Compliance

    (f) To address this problem, you must do the following, unless 
already done:

----------------------------------------------------------------------------------------------------------------
               Actions                             Compliance                            Procedures
----------------------------------------------------------------------------------------------------------------
(1) Inspect the flap operating        Within 50 hours time-in-service       Follow de Havilland Support Limited
 system to identify the P/N of the     (TIS) after October 7, 2010 (the      Technical News Sheet (TNS) CT(C1)
 latch plate installed. If latch       effective date of this AD) or         No 208 Issue 1, dated January 30,
 plate P/N C1-CF-1489 is installed,    within 90 days after October 7,       2009.
 inspect the latch plate to            2010 (the effective date of this
 determine if it is in compliance      AD), whichever occurs first.
 with the design standard. An
 unapproved latch plate P/N C1-CF-
 1489 is made from two pieces
 pressed together while one that
 complies with the design standard
 is machined in one piece from bar
 material.
(2) If during the inspection          Before further flight after the       Follow de Havilland Support Limited
 required in paragraph (f)(1) of       inspection where the unapproved       TNS CT(C1) No 208 Issue 1, dated
 this AD an unapproved latch plate P/  latch plate P/N C1-CF-1849 was        January 30, 2009.
 N C1-CF-1489 is found, replace the    found.
 latch plate with a latch plate that
 complies with the design standard.
 The following U.S. standard
 hardware may be substituted for the
 hardware specified in the service
 information:
(i) 1/16'' diameter cotter pin that
 is P/N MS24665-153 (or equivalent)
 in place of split pin P/N SP90/C;
 and
(ii) Washer that is P/N MS15795-806B
 (or equivalent) in place of washer
 P/N SP13/B.
----------------------------------------------------------------------------------------------------------------

Alternative Methods of Compliance (AMOCs)

    (g) The Manager, Atlanta Aircraft Certification Office (ACO), 
FAA, has the authority to approve AMOCs for this AD, if requested 
using the procedures found in 14 CFR 39.19. Send information to 
ATTN: Carey O'Kelley, Aerospace Engineer, FAA, Atlanta ACO, 1701 
Columbia Avenue, College Park, Georgia 30337; telephone: (404) 474-
5543; fax: (404) 474-5606. Before using any approved AMOC on any 
airplane to which the AMOC applies, notify your appropriate 
principal inspector (PI) in the FAA Flight Standards District Office 
(FSDO), or lacking a PI, your local FSDO.

Material Incorporated by Reference

    (h) You must use de Havilland Support Limited TNS CT(C1) No 208 
Issue 1, dated January 30, 2009, to do the actions required by this 
AD, unless the AD specifies otherwise.
    (1) The Director of the Federal Register approved the 
incorporation by reference of this service information under 5 
U.S.C. 552(a) and 1 CFR part 51.
    (2) For service information identified in this AD, contact de 
Havilland Support Limited, Duxford Airfield, Cambridgeshire, CB22 
4QR, England, phone: +44 (0) 1223 830090; fax: +44 (0) 1223 830085; 
e-mail: info@dhsupport.com; Internet: https://www.dhsupport.com/.
    (3) You may review copies of the service information 
incorporated by reference for this AD at the FAA, Central Region, 
Office of the Regional Counsel, 901 Locust, Kansas City, Missouri 
64106. For information on the availability of this material at the 
Central Region, call (816) 329-3768.
    (4) You may also review copies of the service information 
incorporated by reference for this AD at the National Archives and 
Records Administration (NARA). For information on the availability 
of this material at NARA, call (202) 741-6030, or go to: https://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.

    Issued in Kansas City, Missouri, on August 25, 2010.
John R. Colomy,
Acting Manager, Small Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2010-21741 Filed 9-1-10; 8:45 am]
BILLING CODE 4910-13-P
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