Service difficulty report · Control Valve · Boeing 737990ER

Difficulty date
May 29, 2015
Submitted
June 2, 2015
Operation
Air carrier
Aircraft
N459AS
Make and model
Boeing 737990ER
Aircraft serial
36352
Aircraft time
4,743 hours, 1,566 cycles
Part
Control Valve
Part number
3989084
Part serial
20969
Condition
Malfunctioned
Location
Lt A/C Pack
Part time
4,755 hours, 1,569 cycles
Stage of operation
NR
How discovered
O
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 ON RECALL. ACFT GROUNDED. VERIFIED TCV FAULT ON LT PACK. REPLACED LT PACK TEMP CONTROL VALVE IAW AMM 21-51-10. OPS CHECK NORMAL.