AD 74-10-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Pacific Propeller, Inc. | A6441FN-606 | DETROIT DIESEL ALLISON AEROPRODUCTS Model A6441FN-606 and -606A Propellers |
Unsafe Condition
Propeller blades and hubs that have been stripped, inspected for corrosion, and replated may experience corrosion leading to failure if not maintained within specified intervals.
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Required Actions
Remove from service and inspect for corrosion and replating as specified. Blades and hubs must be stripped, inspected, and replated at intervals not exceeding 36 months from initial installation. New blades may remain in service up to 40 months, but those over 31 months at the effective date must comply with the specified schedule.
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Compliance Time
Compliance required as indicated, unless already accomplished. Specific deadlines include removal by 25 flight hours after May 17, 1974, or by dates such as May 11, June 11, July 11, October 11, 1974, and January 11, 1975, depending on months since initial installation.
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Affected Aircraft
Pacific Propeller, Inc. Model A6441FN-606 and -606A propellers installed on aircraft prior to May 17, 1974.
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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