Service difficulty report · Wire · Boeing 757222

Difficulty date
June 20, 2010
Submitted
July 9, 2010
Operation
Air carrier
Aircraft
N575UA
Make and model
Boeing 757222
Aircraft serial
26689
Aircraft time
58,110 hours, 21,572 cycles
Engine
Pwa PW2037
Part
Wire
Condition
Open
Location
Chiller
Component
Chiller
Component part number
3741
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

GALLEY CHILLER INOP AT R1 DOOR GALLEY G1B. C/B C3023 ON P37 PANEL WAS TRIPPED. C/B RESET BUT WOULD TRIP AFTER APROX 10 SEC. WITH C.B FOR CHILLER ON FWD GALLEY SW PANEL OPEN, C3023 STAYS IN. RANG OUT WIRES FROM CHILLER TO C/B YS8C001, NO DISCREPANCIES NOTED. WITH CONNECTOR OFF OF CHILLER, AND YS8C001 IN, C.B C3023 STAYS IN. CHECKED VOLTAGE ON EACH PHASE TO CHILLER, ALL 3 PHASES OK. REPLACED CHILLER PER MM. WIRING CKS PER WDM. WHEN RINGING OUT CHILLER, FOUND PHASE A AND B SHORTED. AFTER REMOVAL OF CHILLER RECHECKED FOR SHORTED WINDINGS AND NO SHORTS NOTED. POSSIBLE CONNECTOR SHORT, MAY HAVE BEEN DISTURBED ENOUGH DURING REMOVAL TO REMOVE SHORT. CHILLER WILL BE TAGGED WITH REJECT FOLLOW UP TAG.