Service difficulty report · Warning Light · Boeing 737990ER

Difficulty date
June 17, 2017
Submitted
June 19, 2017
Operation
Air carrier
Aircraft
N464AS
Make and model
Boeing 737990ER
Aircraft serial
40714
Aircraft time
12,551 hours, 4,082 cycles
Part
Warning Light
Condition
False Activation
Location
Left 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 MASTER RECALL, THE LT PACK LIGHT ILLUMINATED. LIGHT EXTINGUISHED WITH MASTER CAUTION RESET. ACFT GROUNDED. PERFORMED A PACK ZONE TEMP CONTROLLER BITE CHECK AND FOUND THE NR 1 TCV FAULT LIGHT FOR THIS PACK, ZONE TEMP CONTROL NR 1. RESET, REPERFORMED BITE ALL PASS. NO HISTORY 30 DAYS, ACFT GOOD FOR SERVICE IAW AMM 21-51-00.