AD 87-21-07 R1

87-21-07 R1 GULFSTREAM (AERO COMMANDER): Amendment 39-5741 as revised by Amendment 39-6182.

Applicability: Models 500, 500A, 500B, 500U, 520, 560, 560A, 560E, 560F, 680, 680E, 680F, 680F(P), 680FL(P), and 720 Serial Numbers (S/N 1 through 1854); and Models 500S (S/N 1755 through 3323), 680FL (S/N 1261 through 1853), 685 (S/N 12001 through 12066), and 700 (S/N 70001 through 70032) airplanes equipped with reciprocating engines, certificated in any category.

Compliance: Required as indicated unless already accomplished.

To preclude misfueling of the airplane resulting in engine failure, accomplish the following:

(a) Within the next 12 calendar months after the effective date of this revised AD, unless already accomplished in accordance with the requirements of AD 87-21-07 effective November 12, 1987, modify all fuel filler opening(s) in accordance with the applicable instructions contained in Gulfstream Service Information No. SI-209A, dated June 7, 1988.NOTE: AD 73-6-2, applicable to certain of the above-referenced airplanes, is a prerequisite to the accomplishment of the actions prescribed in this AD.

(b) Airplanes may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished.

(c) In accordance with FAR Part 43, Appendix A, Item (c), the modifications required by this AD are preventative maintenance and may be performed by the holder of a pilot certificate issued under FAR Part 61 on airplanes owned or operated by him, subject to the limitations of FAR 43.3(g). The maintenance record entries required by FAR's 43.9 and 91.173 must be accomplished.

(d) An equivalent means of compliance with this AD may be used if approved by the Manager, Airplane Certification Branch, Southwest Region, Department of Transportation, FAA, Fort Worth, Texas 76193-0150, Telephone (817) 624-5150.

All persons affected by this directive may obtain copies of the documents referred to herein upon request to the Gulfstream Aerospace Corporation, Wiley Post Airport, P.O. Box 22500, Oklahoma City, Oklahoma 73123; or may examine these documents at the FAA, Office of the Assistant Chief Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106.

This amendment revises AD 87-21-07, (Amendment 39-5741). This amendment (39-6182, AD 87-21-07 R1) becomes effective May 5, 1989.