Service difficulty report · A/C Pack · Boeing 737990ER

Difficulty date
November 19, 2022
Submitted
November 21, 2022
Operation
Air carrier
Aircraft
N423AS
Make and model
Boeing 737990ER
Aircraft serial
35206
Aircraft time
34,741 hours, 11,041 cycles
Part
A/C Pack
Part number
UNKNOWN
Condition
Warning Light
Location
Unknown
Stage of operation
NR
How discovered
V
Nature of condition
J
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

LEFT PACK LIGHT ILLUMINATED. RAN QRH, RESETS WITH MASTER CAUTION RESET. GROUNDED - YES. BITE OF LEFT PACK TEMP CONTROLLER SHOWS TCV FAULT LAST LEG. BITE OF CONTROLLER OPS NORMAL AND FAULT CLEARS REF B737-900 AMM 21-61-20-400-801.