AD 89-04-10

89-04-10 GULFSTREAM: Amendment 39-6156. Final copy of Priority Letter issued February 16, 1989.

Applicability: Model G-IV airplanes, Serial Numbers 1060 through 1088; and all G-IV airplanes, Serial Numbers 1000 through 1059, which have been modified by Gulfstream Product Enhancement Program # 16 (PEP-16); certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To prevent inadvertent pusher activation during rotation on takeoff, accomplish the following:

A. Within 24 hours after the effective date of this Airworthiness Directive (AD), and until modifications required by paragraph B., below, are accomplished, revise the Limitations Section of the FAA-approved Airplane Flight Manual (AFM) to include the following limitation. This may be accomplished by inserting a copy of this AD in the AFM:

"OPERATIONS AT AIRFIELDS WITH A PRESSURE ALTITUDE BELOW SEA LEVEL ARE PROHIBITED."

B. Within 14 days after the effective date of this AD, replace Sundstrand Stall Warning Computer, part number (P/N) 965-0041-034 (any Mod Number), with Sundstrand Stall Warning Computer, P/N 965-0041-036, in accordance with Gulfstream Customer Alert Bulletin Number 4, dated February 1, 1989.

C. An alternate means of compliance or adjustment of compliance times, which provides an acceptable level of safety, may be used when approved by the Manager, Atlanta Aircraft Certification Office, FAA, Central Region.

NOTE: If appropriate, the request should be forwarded through a Principal Avionics Inspector, (PAI), who may add comments and then send it to the Manager, Atlanta Aircraft Certification Office.

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.

All persons affected by this directive who have not received copies of the service information from the manufacturer, may obtain copies upon request to Gulfstream Aerospace Corporation, Technical Operations Department, Travis Field, P.O. Box 2206, Savannah, Georgia 31404-2206. This information may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington or at the FAA, Central Region, Atlanta Aircraft Certification Office, 1669 Phoenix Parkway, Suite 210C, Atlanta, Georgia.

This AD was effective earlier to all recipients of Priority Letter AD 89-04-10, dated February 16, 1989.

This amendment (39-6156, AD 89-04-10) becomes effective April 3, 1989.