SDR ASAA2016062217122

Service difficulty report · Control Valve · Boeing 737890

Difficulty date: June 22, 2016
Submitted: June 24, 2016
Operation: Air carrier
Aircraft: N508AS
Make and model: Boeing 737890
Aircraft serial: 35691
Aircraft time: 30,470 hours, 9,252 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Control Valve
Part number: 3989085
Part serial: 20258
Condition: Failed
Location: Ac Bay
Part time: 9,343 hours, 2,966 cycles
Stage of operation: DE
How discovered: O
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

UPON RECALL DURING DESCENT, LT PACK LIGHT ON. LIGHT RESET UPON MASTER CAUTION RESET, ACFT GROUNDED. ACCOMPLISHED NR 1 PACK/ZONE TEMP CONTROLLER BITE, TCV LIGHT ILLUMINATED. R & R LT PACK TEMP CONTROL VALVE, INSTALLATION TEST OK, REF AMM 21-51-00, 21-51-10. ETOPS GROUND VERIFICATION SUCCESSFUL.