AD 74-11-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Gulfstream Aerospace Corporation | G-1159 | Airworthiness Directives; GRUMMAN AMERICAN AVIATION CORPORATION Model G-1159 |
Unsafe Condition
The fire extinguisher circuits may fail due to insufficient redundancy in the electrical squib circuits, which could prevent activation of the fire extinguishing system during an emergency.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace left and right fire extinguisher switches MS24523-21 with MS24524-21 switches, wire switches according to Grumman Gulfstream II Aircraft Service Change 121, and replace pilot's circuit breaker panel nameplate 1159AV2042 with 1159SB20082-11.
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Compliance Time
within the next 100 hours time in service after the effective date of this AD
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Affected Aircraft
Grumman American Aviation Corporation Model G-1159, serial numbers 1 through 110 and 775 except 91 and 95
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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