Service difficulty report · Drive Gear

Difficulty date
March 21, 2007
Submitted
May 1, 2007
Operation
General aviation
Engine
Garrtt TPE331*
Part
Drive Gear
Part number
3020094
Condition
Making Metal
Location
Propeller Gov
Component
Propeller Gov · Woodward
Component part number
8210261
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

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

What was found

(CAN) CONSTANT SPEED, SINGLE ACTING PROPELLER GOVERNOR P/N 895490-10 WAS RECEIVED AT MFG WITH REPORTED PROBLEM CUSTOMER RETURNED ON IN TRANSIT B69894 AND IRR NR 5170 STATING PROP GOVERNOR HAS NO RESET PRESSURE AND SHAFT STICKS AND WILL NOT RETURN TO MINIMUM STOP. THE FAULT WAS NOT CONFIRMED BY AN EXTERNAL VISUAL INSPECTION. A (RUN AS RECEIVED) WAS PERFORMED AND THE FOLLOWING WAS NOTED: ( PUMP CAPACITY WAS 7.8 QPM, SHOULD HAVE BEEN 9.0 QPM ) RELIEF VALVE PRESSURE WAS 440 PSI, SHOULD HAVE BEEN 465 +/- 20 PSI MAGNETIC PICKUP WAS 3.2 VOLTS AT 3700 RPM, SHOULD HAVE BEE 4.5 +/- 0.2 VOLTS THE UNIT WAS SYSTEMATICALLY DISASSEMBLED IAW COMPONENT MM (CMM 33091C, 1986), AND SIGNIFICANT DAMAGE WAS FOUND TO SEVERAL INTERNAL