SDR ASAA2019031028575

Service difficulty report · Warning System · Boeing 737990ER

Difficulty date: March 10, 2019
Submitted: March 12, 2019
Operation: Air carrier
Aircraft: N423AS
Make and model: Boeing 737990ER
Aircraft serial: 35206
Aircraft time: 23,199 hours, 7,622 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Warning System
Condition: False Activation
Location: Cockpit
Stage of operation: NR
How discovered: O
Nature of condition: N
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 ILLUMINATES ON RECALL . QRH COMPLETED LIGHT RESETS. GROUNDED - YES. PERFORMED LEFT PZTC BITE FOUND LEFT RAM AIR ACTUATOR FAULT. CW FIM 21-62 TASK 837 FAULT CLEARED NO HISTORY 30 DAYS LEFT PACK LIGHT NO LONGER ILLUMINATES ON RECALL.