AD 2008-13-28
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper | Aircraft | Airworthiness Directives; Hartzell Propeller Inc. ( )HC-( )(2,3)Y(K,R)-2 Two- and Three-Bladed Compact Series Propellers |
| aircraft | Beechcraft | Corporation Model 76 Duchess | Airworthiness Directives; Hartzell Propeller Inc. ( )HC-( )(2,3)Y(K,R)-2 Two- and Three-Bladed Compact Series Propellers |
| engine | Lycoming | Engines LIO-360 series and LO-360 series reciprocating | Airworthiness Directives; Hartzell Propeller Inc. ( )HC-( )(2,3)Y(K,R)-2 Two- and Three-Bladed Compact Series Propellers |
Unsafe Condition
Propeller hub cracks initiating from the lubrication holes, leading to blade separation and potential loss of control of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform initial and repetitive eddy current inspections (ECI) of the area around the lubrication holes of the hub blade sockets. Use the procedures described in Hartzell Propeller Inc. Alert Service Bulletin (ASB) No. HC-ASB-61-297, Revision 1.
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Compliance Time
Within 50 hours time-in-service (TIS) or 12 months after the effective date of the AD, whichever occurs first, for initial ECI. Repetitive ECIs must be performed within 50-hour TIS intervals or within 12 months from the previous ECI, whichever occurs first.
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Affected Aircraft
Hartzell Propeller Inc. left-hand rotating ( )HC-( )(2,3)Y(K,R)-2 two- and three-bladed, aluminum hub, 'compact' series propellers, with hubs having a non-suffix serial number and lubrication holes located on the shoulder of the hub blade socket. These propellers are installed on Lycoming Engines LIO-360 series and LO-360 series reciprocating engines, installed on Piper Aircraft, Inc. Seneca PA-34-200 and Seminole PA-44-180, and Hawker Beechcraft Corporation Model 76 Duchess airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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