AD 67-17-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Pacific Propeller, Inc. | A6441FN-606 | AERO PRODUCTS Models A6441FN-606 and A6441FN-606A Propellers |
Unsafe Condition
Fixed splines P/N 6523110, 6509978, and P/N 6522974 (Serial No. 1367 and up) may not meet core hardness specifications, leading to potential failure.
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Required Actions
Remove from service fixed splines P/N 6523110 and 6509978. Inspect and mark P/N 6522974 (Serial No. 1367 and up) and others for core hardness compliance. Conduct daily inspections per Allison telegrams until non-compliant splines are replaced.
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Compliance Time
On or before July 1, 1967, and within the next 10 hours' time in service from the effective date.
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Affected Aircraft
Pacific Propeller, Inc. Models A6441FN-606 and A6441FN-606A Propellers with fixed splines P/N 6522974 (Serial No. 1367 and up), P/N 6523110, or P/N 6509978.
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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