SDR ASAA2019031028574

Service difficulty report · Warning System · Boeing 737890

Difficulty date: March 10, 2019
Submitted: March 12, 2019
Operation: Air carrier
Aircraft: N579AS
Make and model: Boeing 737890
Aircraft serial: 35187
Aircraft time: 45,665 hours, 13,563 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Warning System
Condition: False Activation
Location: Cockpit
Stage of operation: CL
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

DURING CLIMB OUT OF FOG RIGHT PACK LIGHT ILLUMINATED FOLLOWED QRH AND RESET TRIP RIGHT PACK LIGHT WENT OUT ONLY TO RE-ILLUMINATE SEVERAL MINUTES LATER. FOLLOWED QRH CLOSED ISOLATION VALVE AND TURNED OFF RIGHT PACK. GROUNDED - YES. C/W FIM 21-53 TASK 818 OPERATED RIGHT PACK AND PERFORMED BITE TEST NO FAULTS FOUND. PACK LIGHT FOR RIGHT PACK DID NOT ILLUMINATE PERFORMED GROUND VERIFICATION OF RIGHT PACK/ZONE TEMP CONTROLLER REF FIM 21-62 TASK 801 NO DEFECTS NOTED AT THIS TIME.