AD 77-13-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | McCauley Propeller Systems | 2A34C | MCCAULEY PROPELLER Models |
| aircraft | McCauley Propeller Systems | 2AF34C55 | MCCAULEY PROPELLER Models |
| aircraft | McCauley Propeller Systems | 3AF32C75 | MCCAULEY PROPELLER Models |
| aircraft | McCauley Propeller Systems | 3AF32C87 | MCCAULEY PROPELLER Models |
| aircraft | McCauley Propeller Systems | 3AF32C93 | MCCAULEY PROPELLER Models |
| aircraft | McCauley Propeller Systems | 3AF34C74 | MCCAULEY PROPELLER Models |
| aircraft | McCauley Propeller Systems | 3AF34C92 | MCCAULEY PROPELLER Models |
| aircraft | McCauley Propeller Systems | D2A34C | MCCAULEY PROPELLER Models |
| aircraft | McCauley Propeller Systems | D2AF34C | MCCAULEY PROPELLER Models |
| aircraft | McCauley Propeller Systems | D3A32C77 | MCCAULEY PROPELLER Models |
Unsafe Condition
Blade actuating pin failures resulting from using an incorrect actuating pin, improper rework of the ferrules, or improper installation of the blade actuating pins and washers, which can cause stripped threads on the actuating pin ends and prevent proper seating on the washer.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Disassemble the propeller and inspect blade actuating pins, washers per McCauley Service Bulletins 99, 99-1, 99-2, 99-3, and related manuals. Repair or replace improperly installed components and reassemble per the same service bulletins and manuals. Note compliance in aircraft records and report inspection results to FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 25 hours' time in service after the effective date of this AD
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Affected Aircraft
McCauley Propeller Systems models 2A34C, 2AF34C55, 3AF32C75, 3AF32C87, 3AF34C74, 3AF34C92, D2A34C, D2AF34C, D3A32C7, etc., with specific hub serial numbers modified by Hoosier Aircraft Accessory, Inc. between December 8, 1972, and June 30, 1975.
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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