SDR UIEA2018052900998

Service difficulty report · Controller · Boeing 767277

Difficulty date: May 28, 2018
Submitted: May 29, 2018
Operation: Air carrier
Aircraft: N767MW
Make and model: Boeing 767277
Aircraft serial: 22694
Aircraft time: 54,879 hours, 37,983 cycles
System (JASC): 2160 · Cabin Temperature Control System
Part: Controller
Condition: Defective
Location: Cabin Temp
Stage of operation: IN
How discovered: 9
Nature of condition: J
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 WAS INOPERATIVE. PERFORMED A BITE TEST OF THE ZONE TEMP CONTROLLER FAULT TRIM VALVE, FOUND AFT ZONE TEMP VALVE MOTOR CIRCUIT BREAKER TRIPPED. REMOVED AND REPLACED ZONE TEMP TRIM AIR VALVE. OPS CHECKED GOOD IAW AMM 21-61-01. FOUND THE ZONE TEMP CONTROLLER FAULT LIGHT REMAINED. REMOVED AND REPLACED THE CABIN ZONE TEMP CONTROLLER IAW AMM 21-61-03. ZONE TEMP OPS CHECKED GOOD IN MANUAL & AUTO.