Service difficulty report · Warning System · Boeing 737990ER

Difficulty date
October 13, 2018
Submitted
October 15, 2018
Operation
Air carrier
Aircraft
N493AS
Make and model
Boeing 737990ER
Aircraft serial
41727
Aircraft time
9,857 hours, 3,329 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

PACK LIGHT ILLUMINATED ON RECALL. EXTINGUISHES WITH MASTER CAUTION RESET. GROUNDED - YES. VERBAL FROM CAPT WAS LEFT PACK LT ON RECALL. ACCOMPLISHED PZTC REF FIM 21-62 TASK 801 NO FAULTS ON NR 2, NR 1 ON BIT, PREV FLT HAD TCV FAULT WITH A GREEN ON VERIFY. RESET WITH NO FURTHER FAULTS. CLEAN BOTH PACKS AND RE-ACCOMPLISHED PZTC BITE BOTH CONTROLLERS WITH NO FAULTS.