SDR UALA2011091404973

Service difficulty report · Lug · Boeing 757222

Difficulty date: September 11, 2011
Submitted: October 7, 2011
Operation: Air carrier
Aircraft: N559UA
Make and model: Boeing 757222
Aircraft serial: 26657
Aircraft time: 63,322 hours, 23,367 cycles
Engine: Pwa PW2037
System (JASC): 2400 · Electrical Power System
Part: Lug
Condition: Damaged
Location: Electrical Sys
Stage of operation: IN
How discovered: O
Nature of condition: O
Precautionary procedure: O

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

What was found

FIRST OFFICER INST XFER STATUS MESSAGE PRESENT. DURING TROUBLESHOOTING, FOUND A SET OF BURNED WIRE LUGS AT TERMINAL BLOCK TB5014 PHASE A INSIDE OF THE P6-4 PANEL BOTTOM. WIRES ARE IDENTIFIED AS W2020-0001-06 PER WDM. SUSPECT MESSAGES ARE RELATED TO BUS PHASE NOT POWERED. TRIMMED DAMAGED WIRE AND REPLACED TERMINAL LUGS AT TB5014 TERMINAL NR 1. W2020-0001-06. NO OTHER WIRE DAMAGE FOUND, RT FMC AND INST XFER STATUS OKAY.