SDR ASAA2016071917424

Service difficulty report · Control Valve · Boeing 737890

Difficulty date: July 19, 2016
Submitted: July 21, 2016
Operation: Air carrier
Aircraft: N581AS
Make and model: Boeing 737890
Aircraft serial: 35188
Aircraft time: 35,314 hours, 10,687 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Control Valve
Condition: Faulted
Location: Nr 1
Stage of operation: TX
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

LEFT PACK LIGHT ILLUMINATED ON RECALL, DURING AFTER START CHECKLIST, RESET MASTER CAUTION AND PACK LIGHT EXTINGUISHED. ACFT GROUNDED. FIM TASK 801, 21-61, PZTC NR 1 SHOWED TCV FAULT, UNABLE TO VERIFY FAULT. RESET AND LEFT PACK LIGHT NO LONGER ILLUMINATES.