Service difficulty report · Warning Light · Boeing 737990ER

Difficulty date
February 5, 2018
Submitted
February 8, 2018
Operation
Air carrier
Aircraft
N408AS
Make and model
Boeing 737990ER
Aircraft serial
41732
Aircraft time
20,690 hours, 6,759 cycles
Part
Warning Light
Condition
False Activation
Location
Lt A/C Pack
Stage of operation
CL
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

DURING CLIMB, THE LEFT PACK LIGHT ILLUMINATED, PASSING 17,000 FT. THE PACK LIGHT WENT OUT AFTER PUSHING TRIP RESET IAW QRH. ACFT GROUNDED. OPERATED LEFT PACK ON GROUND IN SEVERAL DIFFERENT TEMP SELECTIONS. NO FAULTS FOUND. ACCOMPLISHED PACK BITE CHECK IAW AMM 21-61-00 ON BOTH TEMP CONTROLLERS, NO FAULTS LOGGED ON EITHER CONTROLLER. GROUND VERIFICATION CHECKED NORMAL.