SDR 99ZZZX2537

Service difficulty report · Sun Gear · Dhav DHC3

Difficulty date: June 15, 1999
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N511BW
Make and model: Dhav DHC3
Aircraft serial: 35
Engine: Pwa R1340*
System (JASC): 7210 · Turbine Engine Reduction Gear
Part: Sun Gear
Condition: Failed
Location: Gearbox
Part time: 5,745 hours
Stage of operation: TO
Nature of condition: J
Precautionary procedure: C

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

UPON TOUCH DOWN RUN, AT TAKEOFF POWER SETTING, ENGINE RUNNING AT FULL POWER FAILED TO POWER PROPELLER. UPON INVESTIGATION, SUN GEAR IN REDUCTION GEARBOX WAS FOUND TO BE IN 3 PIECES. FAILURE DUE TO CRACKED GEAR. REASON FOR CRACKS, UNKNOWN. REPLACED NOSE CASE WITH GEAR REDUCTION ASSY. TEST RAN GOOD.