AD 79-24-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Pacific Propeller, Inc. | A6441FN-606 | DETROIT DIESEL - ALLISON DIVISION Models A6441FN-606 and -606A Propellers |
Unsafe Condition
Propeller blade failure due to fatigue.
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Required Actions
Complete an interim inspection of the blades using fluorescent magnetic particle method per Detroit Diesel Allison Commercial Service Letter 501-D13/-606 CSL-240. Inspections must be done within specified time windows based on hours since last inspection or overhaul, with intervals not exceeding 3150 hours thereafter. Report results to FAA and inspect hub if cracks or excessive spalling found.
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Compliance Time
Compliance is required as indicated in the specific inspection timelines: within next 150, 450, or 600 hours, or prior to exceeding specified hour limits, depending on hours since last inspection or overhaul.
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Affected Aircraft
Pacific Propeller, Inc. Models A6441FN-606 and -606A propeller blades.
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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