SDR ASAA2016042616539

Service difficulty report · Valve · Boeing 737990ER

Difficulty date: April 26, 2016
Submitted: April 28, 2016
Operation: Air carrier
Aircraft: N492AS
Make and model: Boeing 737990ER
Aircraft serial: 44110
Aircraft time: 1,437 hours, 496 cycles
System (JASC): 2160 · Cabin Temperature Control System
Part: Valve
Part number: 3989085
Part serial: 25514
Condition: Failed
Location: Cabin Temp
Part time: 1,462 hours, 503 cycles
Stage of operation: NR
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

DURING RECALL CONTROLLER CABIN ZONE TEMP LIGHT ILLUMINATED. ACFT GROUNDED. ACCOMPLISHED FIM 21-62, TASK 832 FOUND FLT DECK TRIM VALVE FAULTED. R & R FLT DECK TRIM VALVE REF MM 21-61-21 RE-ACCOMPLISHED BITE, FIM 21-62, TASK 801, NO FAULTS FOUND. CLEARED MEL 21-21F.