AD 54-01-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hamilton Standard Division | 232 | HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers |
| aircraft | Hamilton Standard Division | 242 | HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers |
| aircraft | Hamilton Standard Division | 34D | HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers |
| aircraft | Hamilton Standard Division | 34E | HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers |
| aircraft | Hamilton Standard Division | 43D | HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers |
| aircraft | Hamilton Standard Division | 43E | HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers |
Unsafe Condition
Unwanted reversal of Hamilton Standard propellers could occur due to broken plunger spring, oil film between armature and valve body, or foreign particle lodged between valve and seat in Model 67000 reverse solenoid valves.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Do not use Hamilton Standard Model 67000 reverse solenoid valves on civil aircraft subsequent to December 31, 1954.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Compliance required as indicated.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Hamilton Standard Models 43D, 43E, 34D, 34E, 232, and 242 propellers.
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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