SDR ASAA2019051929369

Service difficulty report · Warning System · Boeing 737890

Difficulty date: May 19, 2019
Submitted: May 20, 2019
Operation: Air carrier
Aircraft: N594AS
Make and model: Boeing 737890
Aircraft serial: 35191
Aircraft time: 42,466 hours, 12,710 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: J
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

RIGHT PACK LIGHT ILLUMINATES ON RECALL. GROUNDED - YES. REF FIM 21-62 TASK 848, BITE TEST #1 PZTC FOUND NO FAULT, BITE TEST #2 PZTC FAULTED TCV, RESET #2 PZTC AND RAN BOTH PACKS TO FULL WARM & FULL COOL FOR 30 MINUTES REF AMM 21-00-00, PERFORMED RECALL TEST FOUND NO ACTIVE FAULT, BITE TEST PZTC #1 & #2 PASSED NO FAULT.