SDR CALA2013122793990

Service difficulty report · Wire · Boeing 757222

Difficulty date: December 13, 2013
Submitted: December 30, 2013
Operation: Air carrier
Aircraft: N515UA
Make and model: Boeing 757222
Aircraft serial: 24840
Aircraft time: 75,896 hours, 28,195 cycles
Engine: Pwa PW2037
System (JASC): 2997 · Hydraulic Power System Wiring
Part: Wire
Condition: Faulty
Location: Trim System
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

EICAS MESSAGE, MACH SPD TRIM, DISPLAYED & MACH SPD LIGHT ILLUMINATED. FOR AIRCRAFT N501UA-N522UA DO 27-09-00 FIG106C AIRCRAFT N523UA-N594UA DO 27-09-00 FIG 106. CREW COMMENTS ILLUMINATED AFTER USE OF ALTERNATE STAB TRIM LEVERS, ITEM ROLLED FWD. WHEN ACTIVATING ALTERNATE STAB TRIM LEVERS EICAS MESSAGE, UNSCHEDULED STAB TRIM, APPEARS ALONG WITH AURAL WARNING. WIRE AT STAB TRIM STANDBY SWITCH S538. OPERATIONS OK, NO MESSAGES OR LIGHTS.