Service difficulty report · Warning System · Boeing 737990ER

Difficulty date
February 7, 2019
Submitted
February 12, 2019
Operation
Air carrier
Aircraft
N402AS
Make and model
Boeing 737990ER
Aircraft serial
41189
Aircraft time
24,732 hours, 8,127 cycles
Part
Warning System
Condition
False Activation
Location
Cocpit
Stage of operation
NR
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

UPON RECALL ON AFTER START CHECKLIST, CONT CAB ZONE TEMP LIGHT ILLUMINATES ALONG WITH MASTER CAUTION AND AIR COND LIGHTS, ACCOMPLISHED QRH ITEMS. GROUNDED - YES. PERFORMED PACK TEMPERATURE CONTROL BITE PER FIM 21-62 TASK 801. FLT DECK TRIM VALVE FAULTED ON BIT BUT CLEARED ON VERIFY.