AD 88-12-11

88-12-11 SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS): Amendment 39-5896. Applies to all SNIAS Alouette/Lama Model SA 315B, SE 3160, SA 316B, SA 316C, SA 3180, SA 318B, SA 318C, and SA 319B helicopters, equipped with main gearbox P/N 3160S62-00-000 or P/N 319A62-00-000; freewheel P/N 3160S60-10-000; and clutch P/N 3160S63-20-000, P/N 3180S63-10-000, or P/N 319A63-00-000, certificated in all categories.

Compliance is required as indicated (unless already accomplished).

To prevent failures of the main drive shaft and freewheel assemblies by ensuring proper operation of the main gearbox oil jet, P/N 3160A62-01-002, and to improve sealing at the freewheel attachment joints, accomplish the following:

(a) Within the next 100 hours time in service or upon observance of a freewheel coupling and seal oil leak, whichever is earlier, comply with Alouette Service Bulletin 65-81, Issue 2, dated February 14, 1979, or Lama Service Bulletin 65-06, Issue 2, dated February 14,1979, as applicable.

(b) After compliance with paragraph (a) of this AD, accomplish the following: After the first flight following the installation of a new or overhauled main gearbox, then every 100 hours time in service, comply with section 1(c) of Alouette Service Bulletin 05-65, dated February 14, 1979, or Lama Service Bulletin 05-14, dated February 14, 1979, as applicable.

NOTE: Service Bulletin 05-65 supersedes Service Bulletin 05-42, dated November 10, 1971, and Service Bulletin 05-14 supersedes Service Bulletin 05-01, dated November 10, 1971.

(c) An alternate method of compliance, which provides an equivalent level of safety, may be used when approved by the Manager, Aircraft Certification Division, Department of Transportation, Federal Aviation Administration, Fort Worth, Texas 76193-0100, or by the Manager, Brussels Aircraft Certification Office, AEU-100, c/o American Embassy, Brussels, Belgium, APO NY 09667.

The procedures shall be done in accordancewith Allouette Service Bulletin 65-81, Issue 2, dated February 14, 1979, or Lama Service Bulletin 65-06, Issue 2, dated February 14, 1979, as applicable. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Aerospatiale Helicopter Corporation, 2701 Forum Drive, Grand Prairie, Texas 75053-4005. Copies may be inspected in the Rules Docket, Office of Regional Counsel, FAA, Southwest Region, 4400 Blue Mound Road, Building 3B, Room 158, Fort Worth, Texas, or at the Office of the Federal Register, 1100 L Street, NW., Room 8401, Washington, D.C.

This amendment supersedes AD 73-13-02, Amendment 39-1666, as amended by Amendment 39-2527. This amendment, 39-5896, becomes effective May 20, 1988.