Service difficulty report · Chiller · Boeing 747422

Difficulty date
September 1, 2010
Submitted
September 3, 2010
Operation
Air carrier
Aircraft
N118UA
Make and model
Boeing 747422
Aircraft serial
28811
Aircraft time
46,640 hours, 5,685 cycles
Engine
Pwa PW4056
Part
Chiller
Part number
2676
Part serial
1287
Condition
Leaking
Location
Galley
Stage of operation
CR
How discovered
9
Nature of condition
K
Precautionary procedure
O

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

What was found

WATER LEAK IN ECONOMY PLUS, MOSTLY ON LT SIDE BUT SOME ON RT. TURNED OFF C2 CHILLER ON RT SIDE. LEAK SUBSIDED. THIS IS CHRONIC. ENSURE BLOCKAGE DOES NOT EXIST AND WATER FLOWS FREELY DOWN TO DRAIN MAST. WATER LEAKS AROUND ROWS 20 THRU 25 ABC AND 21 THRU 25 HKG. REINSTALLED BOTH CHILLERS AND COVER PLATE OVER UNUSED EXHAUST PORT, OPS CHECK FINE, NO LEAK FOUND AS OPENING CEILING PANELS. CHECKED UPPER DECK GALLEY CHILLER AND DRAIN PAN IS NOT DAMAGED, CHECKED UPPER DECK GALLEY FOR WATER LEAK ONTO FLOORING, UPPER DECK GALLEY SINK TO BE DEFERRED IF SOURCE IS NOT DETERMINED. ACCOMPLISHED CH1064. UNABLE TO FIND ANY WETNESS FROM THE BOTTOM OF THE CHILLER DRAIN PAN. BOTH SIDES OF THE CHILLER. REPLACED 2 NEW CHILLERS.