Service difficulty report · Heat Exchanger · Boeing 777222

Difficulty date
November 27, 2019
Submitted
December 3, 2019
Operation
Air carrier
Aircraft
N771UA
Make and model
Boeing 777222
Aircraft serial
26932
Aircraft time
94,675 hours, 16,695 cycles
Engine
Pwa PW4077
Part
Heat Exchanger
Part number
471111203600U
Condition
Inoperative
Location
Nr 1 Eng Oil
Stage of operation
CR
How discovered
O
Nature of condition
M, J
Precautionary procedure
A

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

What was found

2471-1 ESN 777036. DUE TO REPORTS OF HIGH OIL TEMP AND PPE REVIEW OF QAR DATA PPE REQUESTS MINIMUM WORK TO BE ACCOMPLISHED IS REPLACEMENT OF THE FUEL COOLED OIL COOLER (FCOC) PRIOR TO FLIGHT. M&E 27-7921-9-0002 PER AMM 79-21-01 R+R # 1 ENG FUEL OIL HEAT EXCHANGER REF AMM 79-21-01 PERFORMED IDLE LEAK CK ,IDLE CK GOOD.NEED TO PERFORM HIGH POWER CK DUE TO WRITE UP. ADD EMP:U177175,U159910 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1956142 SN OFF 3087 EXCHANGER, F/O OFF 27-7921-9-0002 3087 ON 27-7921-9-0002 6713 COMPLIED WITH TEST 3,6,17 PER MM 71-00-00. OIL TEMPS AND REST OF ENGINE INDICATIONS WITHIN LIMITS. L&R ENGINES MATCHED INDICATIO NS TOO