AD 79-25-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hamilton Standard Division | 24PF-303 | HAMILTON STANDARD Model 24PF Propellers |
| aircraft | Hamilton Standard Division | 24PF-304 | HAMILTON STANDARD Model 24PF Propellers |
| aircraft | Hamilton Standard Division | 24PF-305 | HAMILTON STANDARD Model 24PF Propellers |
| aircraft | Hamilton Standard Division | 24PF-306 | HAMILTON STANDARD Model 24PF Propellers |
| aircraft | Hamilton Standard Division | 24PF-309 | HAMILTON STANDARD Model 24PF Propellers |
| aircraft | Hamilton Standard Division | 24PF-310 | HAMILTON STANDARD Model 24PF Propellers |
Unsafe Condition
Fracture of P/N 738410-1 bell crank and P/N 738405-1 pivot due to cyclic loading.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace bell cranks and pivots in accordance with the schedule: those with less than 2,600 hours time in service as of the effective date must be removed before 3,000 hours time in service; those with 2,600 hours or more must be removed before 400 additional hours time in service. The AD establishes a 3,000 hour life limit for these components.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to the accumulation of specified hours time in service as outlined in the schedule (3,000 hours or 400 additional hours depending on existing time in service as of the effective date).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Hamilton Standard Division Model 24PF propellers with P/N 764995-1, 764996-2, 764996-3, 767600-2, 767600-3, incorporating P/N 738410-1 bell cranks and P/N 738405-1 pivots.
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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