SDR ASAA2013121096713

Service difficulty report · Control Valve · Boeing 737890

Difficulty date: December 10, 2013
Submitted: December 12, 2013
Operation: Air carrier
Aircraft: N518AS
Make and model: Boeing 737890
Aircraft serial: 35693
Aircraft time: 18,707 hours, 5,627 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Control Valve
Part number: 3966081
Part serial: 2838
Condition: Failed
Location: A/C Bay
Part time: 21,861 hours, 6,599 cycles
Stage of operation: CR
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

15,000 FEET, DURING PACK HIGH FLOW INHIBIT TEST ON LT PACK WITH LT PACK OFF, FLAPS 1 SELECTED CABIN RATE F/O CLIMB DID NOT RATE UP. ACFT GROUNDED. R & R LT FLOW CONTROL VALVE IAW MM 21-51-01, PERFORMED OPS CHECK/LEAK TEST, CHECKED GOOD.