91-25-05 GULFSTREAM AEROSPACE CORPORATION: Amendment 39-8107. Docket No. 91-NM-236-AD.
Applicability: Model G-1159A (G-III) series airplanes, serial numbers 357, and 402 through 498; and Model G-IV series airplanes, serial numbers 1000 through 1180; certificated in any category.
Compliance: Required as indicated, unless previously accomplished.
To prevent avionics system failures which would severely inhibit the ability of the flight crew to deal with adverse operating conditions, as well as their ability to conduct a safe flight and landing, accomplish the following:
(a) Within 25 hours time-in-service after the effective date of this AD, perform a one-time inspection to detect chafing or damage of the electrical feeder cable located between the power distribution box and the co-pilot's junction box, in accordance with Gulfstream Alert Customer Bulletins No. 6A (for Model G-III series airplanes), or No. 7A (for Model G-IV series airplanes), both dated October1, 1991, as applicable.
(b) If chafing or damage is detected as a result of the inspection required by paragraph (a) of this AD, prior to further flight, repair the electrical feeder cable in accordance with a manner approved by the Manager, Atlanta Aircraft Certification Office (ACO), FAA, Small Airplane Directorate.
(c) An alternative method of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Atlanta Aircraft Certification Office (ACO), FAA, Small Airplane Directorate. The request should be forwarded through an FAA Principal Maintenance or Avionics Inspector, who may concur or comment and then send it to the Manager, Atlanta ACO.
(d) 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.
(e) The inspection requirements shall be done in accordance with Gulfstream Alert Customer Bulletin No. 6A, dated October 1, 1991, or Gulfstream Alert Customer Bulletin No. 7A, dated October 1, 1991, 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 Gulfstream Aerospace Corporation, P.O. Box 2206, M/S D-10, Savannah, Georgia 31402-9980. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue S.W., Renton, Washington; at the FAA, Small Airplane Directorate, Atlanta Aircraft Certification Office, 1669 Phoenix Parkway, Suite 210C, Atlanta, Georgia; or at the Office of the Federal Register, 1100 L Street N.W., Room 8401, Washington, D.C.
(f) This amendment (39-8107, AD 91-25-05) becomes effective on December 18, 1991.