Service difficulty report · Valve · Boeing 737990ER

Difficulty date
February 13, 2023
Submitted
February 17, 2023
Operation
Air carrier
Aircraft
N491AS
Make and model
Boeing 737990ER
Aircraft serial
44109
Aircraft time
26,997 hours, 8,473 cycles
Part
Valve
Part number
3989085
Part serial
20140
Condition
Faulty
Location
Right Ecs Bay
Part time
29,963 hours, 9,686 cycles
Stage of operation
NR
How discovered
V
Nature of condition
J
Precautionary procedure
K

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

What was found

PACK 2 ILLUMINATED ON RECALL. GROUNDED - YES. ACCOMPLISHED PACK TEMPERATURE CONTROL BITE PROCEDURE REF B737-900 FIM 21-62 TASK 801. #2 CONTROLLER SHOWS THIS PACK TCV HARD FAIL. R & R RIGHT PACK TCV V141 REF B737-900 AMM 21-51/401 OPS CK GOOD.