AD Amdt-39-9113
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Mitsubishi | MU-2 | Airworthiness Directives; Hartzell Model HC-B4 Series Propellers Installed on Mitsubishi MU-2 Series Aircraft |
Unsafe Condition
Fatigue cracks in the propeller hub arm bore and resonant speed shifting into the permitted ground idle operating range.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace existing propeller hubs with improved steel hubs, inspect and rework new hubs every 3,000 hours. Implement new repair limits, shot peening procedures, and retire 'N' configuration blades at 10,000 hours time in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Hartzell Model HC-B4TN-5(D,G,J)L/LT10282(B,K)-5.3R and HC-B4TN-5(D,G,J)L/LT10282N(B,K)-5.3R propellers on Mitsubishi MU-2 series aircraft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.