AD 89-18-02 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Allied Ag Cat Productions, Inc. | G-164 | Airworthiness Directives; SCHWEIZER (GRUMMAN) All Model G-164 Series Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164A | Airworthiness Directives; SCHWEIZER (GRUMMAN) All Model G-164 Series Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164B | Airworthiness Directives; SCHWEIZER (GRUMMAN) All Model G-164 Series Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164B-15T | Airworthiness Directives; SCHWEIZER (GRUMMAN) All Model G-164 Series Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164B-20T | Airworthiness Directives; SCHWEIZER (GRUMMAN) All Model G-164 Series Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164B-34T | Airworthiness Directives; SCHWEIZER (GRUMMAN) All Model G-164 Series Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164B (with 73 inch wing gap) | Airworthiness Directives; SCHWEIZER (GRUMMAN) All Model G-164 Series Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164C | Airworthiness Directives; SCHWEIZER (GRUMMAN) All Model G-164 Series Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164D | Airworthiness Directives; SCHWEIZER (GRUMMAN) All Model G-164 Series Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164D (with 73 inch wing gap) | Airworthiness Directives; SCHWEIZER (GRUMMAN) All Model G-164 Series Airplanes |
Unsafe Condition
Failure of the forward and aft elevator control system push-pull rods and end fittings due to corrosion and cracks.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 30 calendar days after the effective date, and every 12 calendar months thereafter, visually inspect the forward and aft elevator push-pull rod assemblies and end fittings for corrosion and cracks per Schweizer Service Bulletin No. 85. If corrosion or cracks are found, replace or repair the defective assembly using specified parts from the service bulletin and continue the inspections. Allow flight under FAR 21.197 to a location where the AD can be done. Alternate compliance may be approved by the FAA Manager.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 30 calendar days after the effective date of this AD, and thereafter at intervals not to exceed 12 calendar months
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All G-164 series (all serial numbers) airplanes certificated in any category.
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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