SDR UALA2011070603335

Service difficulty report · Servo · Boeing 767322

Difficulty date: July 6, 2011
Submitted: July 25, 2011
Operation: Air carrier
Aircraft: N642UA
Make and model: Boeing 767322
Aircraft serial: 25092
Aircraft time: 87,170 hours, 13,923 cycles
Engine: Pwa PW4060
System (JASC): 2215 · Autopilot Main Servo
Part: Servo
Part number: A2832118
Condition: Faulty
Location: Autopilot Sys
Stage of operation: IN
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

'ELEV SERVO L FAIL' MSG ON MCDP AFTER TEST NR 8. COMPLETED MM FIM 22-00-03 PG 144 MCDP TEST NR 8. TRACED FAULT TREE TO PG 146 BLOCK 210, NEED TO REPLACE LEFT ELEVATOR AUTOPILOT SERVO M21. *NOTE, RPL LEFT FCC FOR TROUBLESHOOTING PER FIM, NO HELP. RE-INSTALLED ORIG L FCC. CONT OF AMIS ITEM 1702003: MCDP TEST NR 1 ON LEFT FCC HAS MSG 'NO INFC L ELEV SURF POS' BELIEVE TO BE RELATED TO TEST NR 8 'ELEV SRVO L FAIL' MSG. REPLACED LEFT ELEVATOR AUTOPILOT SERVO.