Service difficulty report · Control Valve · Boeing 737990ER

Difficulty date
December 10, 2017
Submitted
December 11, 2017
Operation
Air carrier
Aircraft
N440AS
Make and model
Boeing 737990ER
Aircraft serial
41705
Aircraft time
16,435 hours, 5,454 cycles
Part
Control Valve
Part number
3989083
Part serial
1707C
Condition
Failed
Location
Right Ecs Bay
Part time
68,365 hours, 39,805 cycles
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

RIGHT PACK OVERHEAT LITE ON RECALL, EXTINGUISHES WHEN RESET. GROUNDED - YES. REMOVED AND REPLACED RIGHT PACK TEMP CONTROL VALVE PER B737-900 AMM 21-51-10. OPS CK GOOD. THIS REMOVES MEL 21-32B.