Service difficulty report · Warning Light · Boeing 737990ER

Difficulty date
August 5, 2019
Submitted
August 6, 2019
Operation
Air carrier
Aircraft
N472AS
Make and model
Boeing 737990ER
Aircraft serial
60580
Aircraft time
17,331 hours, 5,573 cycles
Part
Warning Light
Condition
False Activation
Location
Cabin Temp
Stage of operation
TX
How discovered
O
Nature of condition
N
Precautionary procedure
D

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

What was found

FWD CABIN ZONE TEMP LIGHT ILLUMINATES DURING MASTER CAUTION RECALL, EXTINGUISHES WITH MASTER CAUTION RESET. GROUNDED - YES. DURING BITE OF PACK TEMP CONTROLLER FOUND FAULT LIGHT ON FWD TEMP SELECTOR, ACCOMPLISHED FIM 21-62 TASK 809. ZONE TEMP FAULT WAS RESET TEMP OPS CHECK GOOD.