Service difficulty report · Warning System · Boeing 737990ER

Difficulty date
February 12, 2019
Submitted
February 15, 2019
Operation
Air carrier
Aircraft
N428AS
Make and model
Boeing 737990ER
Aircraft serial
36353
Aircraft time
11,841 hours, 3,884 cycles
Part
Warning System
Condition
False Activation
Location
Cockpit
Stage of operation
TX
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

AFTER ENGINE START, "CONT CAB" "ZONE TEMP" ILLUMINATED ON RECALL, "ZONE TEMP" LIGHT EXTINGUISHED WHEN "MASTER CAUTION" LIGHT PUSHED. GROUNDED - YES. OPERATED LEFT AIR CONDITIONING PACK AND ZONE TEMP LIGHT DID NOT TURN ON. #1 AND #2 PFTC BITE TESTS GOOD; NO FAULTS. REF FIM 21-62 TASK 842.