AD 82-11-02

82-11-02 GULFSTREAM AMERICAN CORPORATION (formerly Grumman American Corporation, Grumman Aerospace Corporation): Amendment 39-4384. Applies to Gulfstream American Models G-1159 and G-1159B series airplanes, certificated in all categories. Compliance required as indicated unless previously accomplished.

To prevent possible severe flutter of the elevator and/or elevator trim tab, accomplish the following:

A. Within the next 50 hours time in service after the effective date of this AD, and thereafter at intervals not to exceed 50 hours time in service until repairs are accomplished in accordance with paragraph B, inspect the left and right outboard elevator trim tab hinge fittings and left and right elevator rear spar for cracks in accordance with Gulfstream American Customer Bulletin No. 325, Amendment 1, dated March 26, 1982. If cracks are found, repair or replace the failed parts before further flight in accordance with Gulfstream American Customer Bulletin No. 315 datedApril 15, 1982.

B. Within 150 hours time in service after the effective date of this AD, unless already accomplished, accomplish the following in accordance with Gulfstream American Service Change No. 315 dated April 15, 1982:

(1) Remove the left and right elevator outboard trim tab hinge fittings, P/N 1159CSM20105-1, and replace with P/N 1159CSM20837.

(2) Remove the left and right elevator ribs, P/N 1159CS20420-1 and -2, and replace with ribs, P/N 1159RDC300-919 and -920.

(3) Inspect and repair, if necessary, the elevator rear spar.

C. Perform a mass balance inspection of the elevator in accordance with Gulfstream American Model G-1159 Maintenance Manual upon completion of repairs and installation of replacement parts.

D. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Chief, Atlanta Aircraft Certification Office.

E. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD.

The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1).

All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Gulfstream American Corporation, P.O. Box 2206, Savannah, Georgia 31402.

These documents may be examined at the Atlanta Aircraft Certification Office, FAA, 3400 Norman Berry Drive, East Point, Georgia 30344.

This amendment becomes effective May 31, 1982.