SDR ASAA2019041072891

Service difficulty report · Controller · Boeing 737890

Difficulty date: April 7, 2019
Submitted: April 10, 2019
Operation: Air carrier
Aircraft: N570AS
Make and model: Boeing 737890
Aircraft serial: 35185
Aircraft time: 46,080 hours, 13,690 cycles
System (JASC): 2160 · Cabin Temperature Control System
Part: Controller
Condition: Malfunctioned
Location: A/C Packs
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

PRIMARY CONT CABIN ZONE TEMP LIGHT ON. GROUNDED - YES. CONT CABIN ZONE TEMP LIGHT ACTIVE ON RECALL, #2 PACK ZONE TEMP CONTROLLER SHOWS FLT DECK TRIM VALVE FOR PREVIOUS FLT, GREEN FOR VERIFY. RESET CONTROLLER, RAN PACKS, PZTC BITE SHOWS 3 GREEN BOTH CONTROLLERS REF B737-800 FIM 21-62 TASK 801.