SDR ASAA2019022078195

Service difficulty report · Warning Light · Boeing 737890

Difficulty date: February 17, 2019
Submitted: February 20, 2019
Operation: Air carrier
Aircraft: N586AS
Make and model: Boeing 737890
Aircraft serial: 35189
Aircraft time: 43,401 hours, 13,222 cycles
System (JASC): 2160 · Cabin Temperature Control System
Part: Warning Light
Condition: False Activation
Location: Cockpit Temp
Stage of operation: NR
How discovered: V
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

CONT CAB ZONE TEMP LIGHT ILLUMINATES ON MASTER RECALL PRESS. CLEARS ON RESET MC RESET. GROUNDED - YES. ACCOMPLISHED PZTC BITE REF B737-800 AMM TASK 21-61-00-700-806-002. FOUND RT PZTC FAULT LOGGED FLT DCK TRIM VLV. ABLE TO CLEAR FAULT AFTER BITE. LEFT PZTC LOGGED "THIS PACK TCV" PERFORMED VLV RESET PER FIM 21-62 TASK 830. FAULT CLEARED. PERFORMED LEFT AND RT PACK GROUND RUN FOR AN HR. NO FAULTS LOGGED. SYS OPS NML. 21-61-00-700-807-002 CABIN TEMPERATURE CONTROL AND INDICATION - OPERATIONAL TEST.