Service difficulty report · Control Valve · Boeing 737990ER

Difficulty date
February 10, 2020
Submitted
February 14, 2020
Operation
Air carrier
Aircraft
N486AS
Make and model
Boeing 737990ER
Aircraft serial
44107
Aircraft time
17,632 hours, 5,662 cycles
Part
Control Valve
Part number
3989083
Part serial
10676
Condition
Failed
Location
Rt A/C Pack Temp
Part time
43,533 hours, 13,198 cycles
Stage of operation
NR
How discovered
9
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 LIGHT ILLUMINATES ON MASTER CAUTION RECALL. GROUNDED - YES. ACCOMPLISHED BITE CK & R/H PACK TCV FAULTS, REMOVED & REPLACED R/H TCV REF B737-900 AMM 21-51-10 OPS & LK CK GOOD.