Service difficulty report · Warning System · Boeing 737990ER

Difficulty date
December 1, 2018
Submitted
December 5, 2018
Operation
Air carrier
Aircraft
N419AS
Make and model
Boeing 737990ER
Aircraft serial
41734
Aircraft time
22,638 hours, 7,438 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 MASTER CAUTION RECALL, RIGHT PACK LIGHT ILLUMINATED WHEN MASTER CAUTION RESET PRESSED, THE RT PACK LIGHT EXTINGUISHED. GROUNDED - YES. PERFORMED RT PACK/ZONE TEMPERATURE CONTROLLER BITE TEST, NO FAULTS NOTED REF AMM CH 21-51-00-700-803.