AD 2006-22-12

Recurring final rule

Data completeness: 80%

Airworthiness Directives; Hartzell Propeller Inc. Model HC-B5MP-3( )/M10282A( )+6 and HC-B5MP-3( )/M10876( )( )( )( ) Five-Bladed Propellers.

AD Number: 2006-22-12
Status: final_rule
Effective Date: November 13, 2006
Product Category: engine
Docket: Docket No. FAA-2006-25841
FR Citation: 71 FR 62899

Unsafe Condition

Fretting wear occurring between the engine and propeller mounting flanges results in loss of mounting bolt preload, causing failure of the mounting bolts.

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Required Actions

Initial and repetitive torque inspections of propeller mounting bolts must be performed. Initial and repetitive inspections of the propeller mounting flange and engine mounting flange are required. Flanges must be resurfaced if necessary.

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Compliance Time

Before further flight

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Affected Aircraft

Hartzell Propeller Inc. Model HC-B5MP-3( )/M10282A( )+6 and HC-B5MP-3( )/M10876( )( )( )( ) five-bladed propellers.

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Source: Official FAA Source ↗

Retrieved: Apr 4, 2026

Rights: U.S. Government Public Domain

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