Service difficulty report · Warning System · Boeing 737990ER

Difficulty date
October 26, 2018
Submitted
October 29, 2018
Operation
Air carrier
Aircraft
N478AS
Make and model
Boeing 737990ER
Aircraft serial
44105
Aircraft time
13,230 hours, 4,460 cycles
Part
Warning System
Condition
False Activation
Location
Cockpit
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

ON RECALL CONT CABIN ZONE TEMP LIGHT ON. GOES OUT ON RECALL. GROUNDED - YES. ACCOMPLISHED PACK ZONE TEMP CTL BITE. FAULTED FLT DK TCV. FAULT CLEARS. ACCOMPLISHED BITE AGAIN. NO FAULTS. RAN PACKS & VARIED TEMP. NO FAULTS. REF FIM 21-62 TASK 801.