AD 2008-22-21
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Grumman | Various | Airworthiness Directives; Allied Ag Cat Productions, Inc. Model G-164 Series Airplanes |
Unsafe Condition
Corrosion in the rudder main tubular spar could result in failure of the weld to the main spar tube, leading to loss of directional control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Drill an access hole and perform a visual inspection using a borescope of the lower end internal cavity of the rudder main spar tube for corrosion. Also, perform a visual inspection of the exterior of the rudder main spar tube for corrosion.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Initially inspect within the next 60 months after the last inspection required in AD 78-08-09 or within the next 30 days after December 19, 2008, whichever occurs later. Repetitively inspect thereafter at intervals not to exceed 60 calendar months.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Allied Ag Cat Productions, Inc. Models G-164, G-164A, G-164B, G-164B with 73'' wing gap, G-164B-15T, G-164B-34T, G-164B-20T, G-164C, G-164D, and G-164D with 73'' wing gap, all serial numbers.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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