Service difficulty report · Shaft · Pilats PC1245

Difficulty date
March 27, 2001
Submitted
May 2, 2001
Operation
General aviation
Make and model
Pilats PC1245
Aircraft time
1,718 hours
Engine
Pwa PT6A67B
Propeller
Hartzl HCE4A3D
Part
Shaft
Part number
B001
Condition
Sheared
Location
Te Flaps
Part time
1,898 hours, 1,620 cycles
Stage of operation
AP
How discovered
O
Nature of condition
B, A
Precautionary procedure
C, B

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

What was found

(CAN) ON SELECTION OF FLAPS DOWN, FLAPS CAUTION ON C.A.W.S. PANEL CAME ON. FLAPS WERE RESET & TRIED AGAIN. FLAPS CAUTION CAME ON AGAIN. A/C LANDED W/O FLAP. MULTIPLE RESETS WERE THEN TRIED ON GROUND WHICH WOULD CAUSE F LAP CCT BREAKER ON BATTERY BUS TO POP. TROUBLE SHOOTING REVEALED 2 INIT E203 CODES (MORE THAT 20 TURNS DIFFERENCE BETWEEN L/H & R/H ROTATION SENSORS, THEN MULTIPLE E208 CODES (OVERLOAD CB POPPED), & E203 CODES AGAIN. AS AIRCRAF T WASHED SHORTLY BEFORE DEPTR, IT IS FELT THAT R/H FLAP FROZE IN FLT CAUSING INIT E203 CODE. SUBSEQUENT RESETS CAUSED R/H INBOARD FLEX SHAFT TO SWELL & JAM IN ITS HOUSING CAUSING E208 CODES. DURING TROUBLE SHOOTING AFTER MORE RESETS, FLEX SHAFT EVENTUALLY BROKE CAU