AD 67-29-04

67-29-04 GRUMMAN: Amdt. 39-497 Part 39 Federal Register October 25, 1967. Applies to Type G-164 aircraft, Serial Numbers 1 through 400.

Compliance required as indicated.

Gulfstream G-164 type aircraft have experienced loose rivets which attach the rod ends of the elevator forward pushrod assembly. To detect loose rivets on the assembly, P/N A1847-1 (Aircraft Serial Numbers 1 through 100) and P/N A1847-3 (Aircraft Serial Numbers 101 through 400), accomplish the following:

(a) For aircraft with 250 or more hours' total time in service on the effective date of this AD comply with paragraph (c) within the next 50 hours' time in service, and thereafter at intervals not to exceed 100 hours' time in service from the last inspection.

(b) For aircraft with less than 250 hours' total time in service on the effective date of this AD comply with paragraph (c) before the accumulation of 300 hours' total time in service, and thereafter at intervals not to exceed 100 hours' time inservice from the last inspection.

(c) Visually inspect the fore and aft ends of the pushrod assemblies to determine if there are loose rivets or elongated holes.

(d) If loose rivets or elongated holes are found during the inspection required in paragraphs (a) or (b), before further flight, remove rivets (4 places) and repair as follows:

(1) Line ream original rivet holes .190 + .001 inch. (4 places)

(2) Install AN3-13A bolt, AN960-10 washer (under nut), and AN365-1032 nut. (4 places)

If holes have elongated in excess of .191 inches, repair as follows:

(3) Line ream original rivet holes .250 + .001 inch. (4 places)

(4) Install AN4-14A bolt, AN960-416 washer (under nut), and AN365-428 nut. (4 places)

If holes have been elongated in excess of .251 inch then replace the assembly.

(e) The repetitive inspection required by paragraphs (a) and (b) of this AD may be discontinued upon accomplishment of the repair specified in paragraph (d) or equivalent repair approved by the Chief, Engineering & Manufacturing Branch, FAA Eastern Region.

(f) Upon request, with substantiating data submitted through an FAA maintenance inspector, compliance time may be increased by the Chief, Engineering & Manufacturing Branch, FAA Eastern Region.

This amendment effective October 27, 1967.