74-11-05 GRUMMAN AMERICAN AVIATION CORPORATION: Amendment 39- 1849. Applies to Grumman G-1159, Serial Number 1 through 110 and 775 except 91 and 95, certificated in all categories.
Compliance required within the next 100 hours time in service after the effective date of this AD, unless already accomplished.
To provide dual electrical fire extinguisher squib circuits, accomplish the following or an equivalent rework approved by the Chief, Engineering and Manufacturing Branch, Southern Region.
Remove the left and right fire extinguisher switches MS24523-21 and install MS24524- 21 switches in their place.
Wire switches in accordance with Grumman Gulfstream II Aircraft Service Change 121.
Replace pilot's circuit breaker panel nameplate 1159AV2042 with nameplate 1159SB20082-11.
This rework is outlined in detail in the Grumman Gulfstream II Aircraft Service Change 121.
This amendment is effective May 24, 1974.