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Federal Register / Vol. 86, No. 198 / Monday, October 18, 2021 / Rules and Regulations
20211917 Sikorsky Aircraft Corporation:
Amendment 3921735; Docket No.
FAA20210106; Project Identifier AD
202000708R.
a Effective Date This airworthiness directive AD is effective November 22, 2021.
b Affected ADs None.
c Applicability This AD applies to Sikorsky Aircraft Corporation Model S92A helicopters, certificated in any category, with the following installed:
1 A Martin-Baker side facing utility seat supplier part number P/N
MBCS12410AA001 with a serial number S/N identified in Table 2 of Martin-Baker Special Information Leaflet SIL No. 831, dated July 10, 2019 SIL 831, that is not marked with SIL831 incorporated; or 2 A Martin-Baker observer seat supplier P/N MBCS12200 or MBCS73012 with an S/N identified in Table 2 of Martin-Baker SIL
No. 833, dated July 11, 2019 SIL 833, that is not marked with SIL833 incorporated.
Note 1 to paragraph c: SIL 831 and SIL
833 are attached to Sikorsky S92A
Helicopter Alert Service Bulletin ASB 92
25026, Basic Issue, dated March 5, 2020
ASB 9225026.
Note 2 to paragraph c: Section 3., the Accomplishment Instructions, Tables 1 and 2
of ASB 9225026, specify cross references of Martin-Baker supplier P/Ns with Sikorsky P/Ns and kit P/Ns.
Note 3 to paragraph c: The marking SIL831 incorporated or SIL833
incorporated, as applicable, could be located adjacent to identification labels on the underside of the sitting platform assembly P/N MBCS4111 or MBCS12215, respectively.
d Subject Joint Aircraft System Component JASC
Code: 2500, Cabin Equipment/Furnishings;
and 2520, Passenger Compartment Equipment.

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e Unsafe Condition This AD was prompted by an incident of a side facing utility seat detaching from wall attachment points during dynamic testing.
The FAA is issuing this AD to detect and address a main back tube, a component of the main back tube assembly, which does not meet design specifications. The unsafe condition, if not addressed, could result in increased surface friction in the direction of the seat attenuation, failure of proper utility seat attenuation during a crash event, excessive lumbar loads during a crash event, and subsequent excessive occupant injury.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions 1 Within 125 hours time-in-service or six months after the effective date of this AD, whichever occurs first, replace each main
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back tube assembly by following Section 3., Accomplishment Instructions, paragraphs C.
through E., of ASB 9225026; except where the service information referenced in ASB
9225026 specifies destroying and disposing of parts or discarding parts, this AD requires removing those parts from service instead.
Note 4 to paragraph g1: SIL 831 and SIL
833, referred to in ASB 9225026, refer to main back tube assembly as tube assembly, back main.
2 As of the effective date of this AD, do not install a Martin-Baker side facing utility seat identified in paragraph c1 of this AD
or a Martin-Baker observer seat identified in paragraph c2 of this AD unless the actions in paragraph g1 of this AD have been accomplished.
h Alternative Methods of Compliance AMOCs 1 The Manager, Boston ACO Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph i of this AD.
2 Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/
certificate holding district office.
i Related Information For more information about this AD, contact Dorie Resnik, Aerospace Engineer, Aviation Safety Section, Boston ACO Branch, FAA, 1200 District Ave., Burlington, MA
01803; phone: 781 2387693; email:
dorie.resnik@faa.gov.
j Material Incorporated by Reference 1 The Director of the Federal Register approved the incorporation by reference IBR of the service information listed in this paragraph under 5 U.S.C. 552a and 1 CFR
part 51.
2 You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise.
i Sikorsky S92A Helicopter Alert Service Bulletin ASB 9225026, Basic Issue, dated March 5, 2020, with attachments:
A Martin-Baker Special Information Leaflet SIL No. 831, dated July 10, 2019;
and B Martin-Baker SIL No. 833, dated July 11, 2019.
ii Reserved 3 As the design approval holder for the product identified in paragraph c of this AD, contact Sikorsky Aircraft Corporation for Martin-Baker service information, as well as Sikorsky S92A helicopter service information identified in this AD, by contacting your local Sikorsky Field Representative or Sikorskys Service Engineering Group at Sikorsky Aircraft Corporation, Mailstop K100, 124 Quarry Road, Trumbull, CT 06611; telephone 1800
9464337 1800WingedS; email wcs_

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cust_service_eng.gr-sik@lmco.com. Operators may also log on to the Sikorsky 360 website at https www.sikorsky360.com.
4 You may view this service information at FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call 817 2225110.
5 You may view this service information that is incorporated by reference at the National Archives and Records Administration NARA. For information on the availability of this material at NARA, email: fr.inspection@nara.gov, or go to:
https www.archives.gov/federal-register/cfr/
ibr-locations.html.
Issued on September 8, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202122464 Filed 101521; 8:45 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20210576; Project Identifier 2019CE008AD; Amendment 3921758; AD 20212020
RIN 2120AA64

Airworthiness Directives; Pacific Aerospace Limited Airplanes Federal Aviation Administration FAA, DOT.
ACTION: Final rule.
AGENCY:

The FAA is adopting a new airworthiness directive AD for certain Pacific Aerospace Limited Model 750XL
airplanes. This AD was prompted by mandatory continuing airworthiness information MCAI originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI
identifies the unsafe condition as installation of the wing leading edge tank fuel pickup assembly in a prestressed condition, which could cause cracks in the wing spar web or the fuel pickup assembly pipe. This AD requires inspecting the angle of the support bracket on the wing leading edge tank fuel pickup assembly and taking any necessary corrective actions. The FAA is issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective November 22, 2021.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD
as of November 22, 2021.
SUMMARY:

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