SDR ASAA2020030432348

Service difficulty report · Unknown · Boeing 737890

Difficulty date: March 2, 2020
Submitted: March 4, 2020
Operation: Air carrier
Aircraft: N535AS
Make and model: Boeing 737890
Aircraft serial: 35200
Aircraft time: 35,530 hours, 10,251 cycles
System (JASC): 2160 · Cabin Temperature Control System
Part: Unknown
Condition: Malfunctioned
Location: Cabin Temp
Stage of operation: NR
How discovered: O
Nature of condition: J
Precautionary procedure: K

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

What was found

CONT CAB ZONE TEMP LIGHT-EXTINGUISHES WITH RECALL. GROUNDED - YES. ACCOMPLISHED B737-800 FIM 21-61 TASK 801, PZTC #1 FAULTED TRIM VALVE & CAB SENSOR, PZTC #2 FAULTED CAB SENSOR, RESET BOTH PZTC, FAULTS WENT AWAY, OPS BOTH PACKS FOR SEVERAL MINUTES NO FAULTS ACTIVE ON RECALL TEST & PZTC BITE TEST, B737-800 AMM 21-00-00.