SDR ASAA2019022518275

Service difficulty report · Warning Light · Boeing 737890

Difficulty date: February 21, 2019
Submitted: February 26, 2019
Operation: Air carrier
Aircraft: N563AS
Make and model: Boeing 737890
Aircraft serial: 35180
Aircraft time: 46,590 hours, 13,950 cycles
System (JASC): 2160 · Cabin Temperature Control System
Part: Warning Light
Condition: False Activation
Location: Cockpit Temp
Stage of operation: TX
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

AFTER ENGINE START CONT CAB ZONE TEMP LITE ILLUMINATED WILL NOT EXTINGUISH AFTER FOLLOWING QRH. GROUNDED - YES. REF B737-800 FIM 21-61 TASK 801, #1 PZTC BITE TEST PASSED NO FAULT NOTED, #2 PZTC BITE TEST FAULTED FLT DECK TRIM VALVE, NO ACTIVE FAULT SHOWS AFTER #2 PZTC RESET, BOTH PACKS OPS TES NORMAL REF B737-800 AMM 21-61-00, CLEARS MEL 21-21G.