AD 54-01-02
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
The low pitch stop wedge can move forward from its position under the stop levers under vibratory conditions, allowing the propeller to travel into the reverse range upon governor demand for lower pitch.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Rework all low pitch stop levers and wedges as specified in Hamilton Standard Service Bulletin No. 273 and its Supplement No. 273A.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to June 1, 1954
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Affected Aircraft
Hamilton Standard Models 43D, 43E, 34D, 34E, 232, and 242 Propellers incorporating Low Pitch Stop Assemblies with Wedge Return Springs or Wedge Inserts on specified aircraft models.
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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