AD 83-24-11 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | McCauley Propeller Systems | 2A34C | MCCAULEY ACCESSORY DIVISION Models 2A34C66/90AT-2, E2A34C73/90AT- 8, and 2A36C23/84B-0 Propellers |
| aircraft | McCauley Propeller Systems | 2A36C23 | MCCAULEY ACCESSORY DIVISION Models 2A34C66/90AT-2, E2A34C73/90AT- 8, and 2A36C23/84B-0 Propellers |
| aircraft | McCauley Propeller Systems | E2A34C | MCCAULEY ACCESSORY DIVISION Models 2A34C66/90AT-2, E2A34C73/90AT- 8, and 2A36C23/84B-0 Propellers |
Unsafe Condition
Propeller blade failure due to scratch(es) within the first four outboard threads or other unairworthy conditions in the retention threads of McCauley Models 2A34C66/90AT-2, E2A34C73/90AT-8, and 2A36C23/84B-0 propellers.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Disassemble and inspect retention threads on blades and ferrules per Service Bulletin 151A. Replace blades with scratches in first four outboard threads or other unairworthy conditions. Repair blades with scratches from fifth thread inboard and repair/replate ferrules with sharp edges. Dye penetrant inspect threads if no scratches observed. Obtain special flight permit to operate to a base where AD is accomplished if needed.
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Compliance Time
Within the next 25 hours time in service or within the next 30 days after the effective date of this AD, whichever occurs earlier for propellers with 400 or more hours time in service since new. For propellers with less than 400 hours time in service since new, prior to accumulating 425 hours time in service.
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Affected Aircraft
McCauley Propeller Systems Models 2A34C66/90AT-2, E2A34C73/90AT-8, and 2A36C23/84B-0 propellers with specific serial numbers listed in McCauley Service Bulletin No. 151A dated December 6, 1985.
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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