Service difficulty report · Heat Exchanger · Boeing 757222

Difficulty date
July 20, 2011
Submitted
August 12, 2011
Operation
Air carrier
Aircraft
N535UA
Make and model
Boeing 757222
Aircraft serial
25130
Aircraft time
66,847 hours, 24,628 cycles
Engine
Pwa PW2037
Part
Heat Exchanger
Condition
Malfunctioned
Location
A/C Pack
Stage of operation
NR
How discovered
9
Nature of condition
M
Precautionary procedure
O

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

What was found

RIGHT PACK PUTTING OUT 90 DEGREE AIR. REPLACED RT PACK LOW LEVEL CTR L VALVE, NO HELP. RT PACK OUT TEMP STILL AT 81 DEGREES. LEFT PACK 34 DEGREES. REPLACED HEAT EXCHANGERS PER MM AND CONDENSER.