SDR CA971015010

Service difficulty report · Ferrules · Dhav DHC8102

Difficulty date: October 2, 1997
Submitted: March 26, 2000
Operation: Air carrier
Make and model: Dhav DHC8102
Engine: Pwa PW120A
System (JASC): 2750 · Trailing Edge Flap Control System
Part: Ferrules
Part number: 0877
Condition: Worn
Location: Flap Drive Cable
Component: Sundstrandem · 745583A
Stage of operation: IN
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) A FAIR AMOUNT OF WEAR BEYOND LIMITS WAS FOUND ON THE END OF THE FERRULES OF THE SECONDARY FLAP DRIVES IT APPEARS THAT THE BEARINGS IN THE COUPLINGS ARE SPINNING AGAINST THE FERRULES AND CAUSING THE WEAR. IT WAS NOTED THAT SEVERAL OTHER SECTIONS OF THE SECONDARY DRIVE OUTER CASINGS HAVE THE SAME WEAR ON THE FERRULE END. THE WEAR LIMITS ARE ONLY .005. THE SUBMITTER EXPECTS TO SEE A LOT OF THESE IN THE FUTURE.