SDR UALA2010111704256

Service difficulty report · Wire · Boeing 757222

Difficulty date: November 17, 2010
Submitted: November 24, 2010
Operation: Air carrier
Aircraft: N545UA
Make and model: Boeing 757222
Aircraft serial: 25323
Aircraft time: 72,142 hours, 20,921 cycles
Engine: Pwa PW2037
System (JASC): 7297 · Turbine Engine System Wiring
Part: Wire
Condition: Broken
Location: Engine
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

NR 1 EGT ON EICAS FLUX BETWEEN 0 AND 430 STBY ENG INST OKAY. REPLACED LEFT EICAS COMPUTER AND CROSSLOADED OPC SOFTWARE 3174-BCG-006-06, PER MM. BITE CHECKS OKAY, NO MSGS. DURING EEC STATIC TEST NO WHITE BOX APPEARED AROUND PRI AND SEC DISPLAY ON EPCS PAGE. REPLACED EEC PER MM. ALSO, REPLACED LEFT PDIU PER MM. INSPECTED W31 HARNESS ASSY, FOUND BROKEN GROUND WIRE. REPLACED WIRE. ACCOMPLISHED EEC STATIC TEST, EPCS PT5-EEC MSG DID NOT REAPPEAR.