AD 76-21-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Allied Ag Cat Productions, Inc. | G-164 | Airworthiness Directives; Grumman Model G-164 Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164A | Airworthiness Directives; Grumman Model G-164 Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164B | Airworthiness Directives; Grumman Model G-164 Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164B-15T | Airworthiness Directives; Grumman Model G-164 Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164B-20T | Airworthiness Directives; Grumman Model G-164 Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164B-34T | Airworthiness Directives; Grumman Model G-164 Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164B (with 73 inch wing gap) | Airworthiness Directives; Grumman Model G-164 Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164C | Airworthiness Directives; Grumman Model G-164 Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164D | Airworthiness Directives; Grumman Model G-164 Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164D (with 73 inch wing gap) | Airworthiness Directives; Grumman Model G-164 Airplanes |
Unsafe Condition
Main landing gear strut failures associated with Frenco Co. P/N 1428 struts installed under STC SA647WE.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect main gear struts P/N 1428 for cracks via dye penetrant or magnetic particle inspection within 100 landings after AD effective date (if not done in last 1900 landings), then every 2000 landings. Replace cracked struts with unused same P/N before flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 100 landings after the effective date of this airworthiness directive, unless accomplished within the last 1900 landings, and thereafter at intervals not to exceed 2000 landings from the last inspection
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Grumman Model G-164 airplanes with Frenco Co. main landing gear struts P/N 1428 installed under STC SA647WE
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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