AD 62-26-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Gulfstream Aerospace Corporation | G-159 | Airworthiness Directives; GRUMMAN Model G-159 Aircraft |
Unsafe Condition
Abnormal fuel system operation has caused structural damage to the wing area, specifically damage to the wing structure in the integral tanks with attention to the three top and three bottom rivets in the vertical stiffeners on the ribs.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Defuel left and right wing tanks, remove inspection covers, inspect for wing structure damage; repair damage per Grumman FAA-approved instructions and modify by removing Parker P/N 119-578735 fuel vent flow valves, drilling a 5/32-inch hole in the valve body, brush-coating the hole, and reinstalling the valve. Exceptions allow ferrying without passengers or operation under a special flight permit if damage is confined to stiffener and rib attachments.
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Compliance Time
prior to further flight
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Affected Aircraft
GRUMMAN Model G-159 Aircraft Serial Numbers 1 through 93 (except 75 and 76) and Aircraft Serial Number 114.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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