Service difficulty report · Warning Message · Boeing 737990ER

Difficulty date
August 23, 2020
Submitted
August 26, 2020
Operation
Air carrier
Aircraft
N481AS
Make and model
Boeing 737990ER
Aircraft serial
44106
Aircraft time
19,348 hours, 6,196 cycles
Part
Warning Message
Condition
False Activation
Location
Lt A/C Pack
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 MC RECALL LT PACK LIGHT ILLUMINATED. FOLLOWED QRH, EXTINGUISHED AFTER MC RESET. GROUNDED - YES. NR 1 ZONE TEMP CONT LOGGED SRADA EXIT FAULT. PERFORMED PACK TEMP CONTROL BITE PROCEDURE ON THE NR 1 & 2 ZONE TEMP CONTROL UNIT, PER B737-900 FIM 21-62 TASK 801. NO MAINT MSG NOTED AND GO LIGHTS VERIFIED GREEN.