Service difficulty report · Ring Gear · Dhav DHC6300

Difficulty date
September 20, 2011
Submitted
January 23, 2013
Operation
Air carrier
Make and model
Dhav DHC6300
Aircraft time
34,597 hours
Engine
Pwa PT6A34
Propeller
Hartzl HCB3TN3
Part
Ring Gear
Part number
E3024765C
Part serial
SG36070
Condition
Failed
Location
Engine
Part time
515 hours
Stage of operation
CR
How discovered
O
Nature of condition
Y
Precautionary procedure
E

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

What was found

(CAN) IN CRUISE FLIGHT, CHIP DETECTOR LIGHT ILLUMINATED. 2-3 MINUTES LATER OIL PRESSURE BEGAN TO DROP AND BECAME ERATTIC. ENGINE WAS SHUTDOWN AND ACFT LANDED. A PRELIMINARY INSPECTION REVEALED THAT THE POWER SECTION SUN GEAR HAD FAILED. THE GEAR WAS NOT PART OF RECENTLY ISSUED FAA AWD 2011-20-51 THIS GEAR SN WAS SG36-070. A TEAR DOWN REPORT WILL BE SUBMITTED WITH THIS SDR WHEN IT BECOMES AVAILABLE.