Service difficulty report · Outflow Valve · Boeing 737924

Difficulty date
October 11, 2024
Submitted
October 14, 2024
Operation
Air carrier
Aircraft
N37408
Make and model
Boeing 737924
Aircraft serial
30125
Aircraft time
62,532 hours, 26,182 cycles
Part
Outflow Valve
Part number
40631997201AA
Part serial
9819740
Condition
Faulted
Location
Zone 100
Part time
78,256 hours, 28,633 cycles
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

AUTO FAIL PACK CONTROL CW WITH MEL 2114B. PULL (OPEN) AND SAFETY PRESSURIZATION CONTROL-AUTO 2 CIRCUIT BREAKER ON P6-4 PANEL. MEL 2114B APPROVED. FOUND CODE 068 OFV LRU FAIL. DDP CW MEL 2114B. *DM* SUGGEST FIM 21-31 TASK 802, SEE M/L FOR OUTFLOW VALVE V48, OR OUTFLOW VALVE GASKET, AS NEEDED. REF ELB LP 9537130 AND 9531980 REMOVED AND REPLACED THE OUTFLOW VALVE AND THE NO.1 AND NO.2 CABIN PRESSURE CONTROLLERS REF AMM 21-31-03-400-801, 21-31-00-710-801 TEST PASSED AND AMM 21-31-02 TEST PASSED WORK ACCOMPLISHED BY V900455