Service difficulty report · Modulating Valve · Boeing 767323

Difficulty date
April 22, 2022
Submitted
April 27, 2022
Operation
Air carrier
Aircraft
N321CM
Make and model
Boeing 767323
Aircraft serial
29431
Aircraft time
84,119 hours, 14,121 cycles
Part
Modulating Valve
Part number
3987865
Part serial
2694
Condition
Failed
Stage of operation
NR
How discovered
V
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

AFT CABIN TEMP EICAS MSG. AFT CABIN TEMP EICAS MSG DEFERRED PER MEL 21-61-01-02 CAT C @ 0927Z, 4/22/22 AC REMAINS ETOPS 180. CLEARED MEL 21-61-02-02 REMOVED AND REPLACED AFT ZONE TRIM MODULATING VALVE PER AMM 21-61-07 @0530Z 4/23/22 AC REMAINS ETOPS 180. NO TRAX TIME INFO.