Voglio sapere a riguardo di…

28476

Federal Register / Vol. 86, No. 101 / Thursday, May 27, 2021 / Rules and Regulations
cycles per hour TIS, the IFWU assembly is an REL IFWU assembly.
ii If any calculation specified in paragraph h2 of this AD results in 6 or less lift cycles per hour TIS, the IFWU assembly is a Non-REL IFWU assembly.
Note 1 to paragraph h2: Sikorsky Aircraft Corporation All Operators Letter AOL CCS61AOL040005, dated May 18, 2004, provides an example and additional information about tracking cycles and the moving average procedure.

jbell on DSKJLSW7X2PROD with RULES

Note 2 to paragraph h2: The following is a sample calculation for subsequent 50
hour TIS intervals. Assume the total number of lift cycles for the first 50 hour TIS interval used in the previous moving average calculation = 450 lift cycles and the total number of lift cycles for the previous 300
hours TIS = 2,700 lift cycles. The subsequent moving average of lift cycles per hour TIS =
2,700450 divided by 250 = 9 lift cycles per hour TIS.
3 Once an IFWU assembly is determined to be an REL IFWU assembly, it remains an REL IFWU assembly for the rest of its service life and is subject to the inspection for REL
IFWU assemblies required by paragraph i of this AD.
4 Once an IFWU assembly is determined to be an REL IFWU assembly, you no longer need to perform the 250-hour TIS moving average calculation required by paragraph h2 of this AD, but you must continue to count and record the lift cycles as required by paragraph g2 of this AD.
i Repetitive Inspections of REL IFWU
Assemblies and Replacement For each REL IFWU assembly, as determined by paragraph h1 or 2 of this AD:
1 Within 500 hours TIS or 7,500 lift cycles, whichever occurs first since the assembly was determined to be a REL IFWU
assembly, and thereafter at intervals not to exceed 500 hours TIS or 7,500 lift cycles, whichever occurs first, inspect for wear, surface distress, and endplay by following paragraphs B.1 through B.6 of the Accomplishment Instructions of Sikorsky Aircraft Corporation Alert Service Bulletin 61B3567B, Revision B, dated August 11, 2003. Record all the information specified in Figures 1 through 3 of the Sikorsky Aircraft Corporation Alert Service Bulletin 61B35
67B, Revision B, dated August 11, 2003. You may record this information on any suitable maintenance record, or you may use the Sikorsky evaluation forms provided in Sikorsky Aircraft Corporation Alert Service Bulletin 61B3567B, Revision B, dated August 11, 2003. This AD does not require you to contact Sikorsky or provide information to Sikorsky.
2 If during any inspection required by paragraph i1 of this AD, any IFWU
assembly part is found whose average wear, wear marks, surface distress, or endplay exceeds the limits specified in paragraphs B.1 through B.6 of the Accomplishment Instructions of Sikorsky Aircraft Corporation Alert Service Bulletin 61B3567B, Revision B, dated August 11, 2003, before further flight, replace the affected part with an airworthy IFWU assembly part.

VerDate Sep<11>2014

16:14 May 26, 2021

Jkt 253001

Note 3 to paragraph i2: Sikorsky Aircraft S61L/N Overhaul Manual, SA4045
83, Revision 20, dated August 15, 2003, as revised by Temporary Revisions 65193, 194, 195, and 196, contains the overhaul procedures for the IFWU assembly.
j Part Marking For each REL IFWU assembly, as determined by paragraph h1 or 2 of this AD: Before further flight after the assembly was determined to be an REL IFWU
assembly, permanently mark IFWU
camshafts, P/N 6135024052, 6135024072, S613520611, S613520614 and S6137
23075, and IFWU gear housings, P/N 61350
24051, 6135024068, S613520695, and S613723057, with the letters REL. Mark the camshafts by applying etching ink on the surface of the part that is 0.5-inch square with the depth of the letters not to exceed 0.001 inch. Before further flight and after etching, neutralize the etched surface and oil to prevent corrosion.
k Alternative Methods of Compliance AMOCs 1 The Manager, International Validation 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 International Validation Branch, send it to the attention of the person identified in paragraph l1 of this AD.
Information may be emailed to: 9-AVS-AIR730-AMOC@faa.gov.
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.
l Related Information 1 For more information about this AD, contact Isabel Saltzman, Aviation Safety Engineer, Boston ACO Branch, FAA, 1200
District Avenue, Burlington, MA 01803;
telephone 7812387649; email Isabel.L.Saltzman@faa.gov.
2 Service information identified in this AD that is not incorporated by reference is available at the addresses specified in paragraphs m3 and 4 of this AD.
m 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 Aircraft Corporation Alert Service Bulletin 61B3567B, Revision B, dated August 11, 2003.
ii Reserved 3 For service information identified in this AD, contact your local Sikorsky Field Representative or Sikorskys Service Engineering Group at Sikorsky Aircraft Corporation, 124 Quarry Road, Trumbull, CT

PO 00000

Frm 00008

Fmt 4700

Sfmt 4700

06611; telephone 1800-Winged-S; email wcs_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 the 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 8172225110.
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: fedreg.legal@nara.gov, or go to:
https www.archives.gov/federal-register/cfr/
ibr-locations.html.
Issued on May 4, 2021.
Gaetano A. Sciortino, Deputy Director for Strategic Initiatives, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202111081 Filed 52621; 8:45 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20201171; Product Identifier 2017SW124AD; Amendment 3921548; AD 20211015
RIN 2120AA64

Airworthiness Directives; Airbus Helicopters Deutschland GmbH
Helicopters Federal Aviation Administration FAA, DOT.
ACTION: Final rule.
AGENCY:

The FAA is adopting a new airworthiness directive AD for all Airbus Helicopters Deutschland GmbH
Model MBBBK 117 C2 and Model MBBBK 117 D2 helicopters. This AD
was prompted by a determination that a life limit for the adapter forward FWD
of the outboard load system, repetitive inspections of other components of that system, and for certain helicopters, a modification of the outboard load system, are necessary to address the unsafe condition. This AD requires a modification of the outboard load system for certain helicopters, repetitive inspections of the outboard load system and its components for any defect including cracking, damage, corrosion, and incorrect installation and applicable corrective actions, and implementation of a new life limit for the FWD adapter, as specified in a European Aviation Safety Agency now European Union Aviation Safety Agency EASA AD, which is
SUMMARY:

E:FRFM27MYR1.SGM

27MYR1