Service difficulty report · Control Valve · Boeing 737890

Difficulty date
July 21, 2015
Submitted
July 28, 2015
Operation
Air carrier
Aircraft
N590AS
Make and model
Boeing 737890
Aircraft serial
35687
Aircraft time
28,921 hours, 8,808 cycles
Part
Control Valve
Part number
3989084
Part serial
1495
Condition
Malfunctioned
Location
Lt A/C Pack
Part time
71,576 hours, 39,492 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 A/C PACK LIGHT ILLUMINATED ON RECALL, CANCELS WITH RESET. ACFT GROUNDED. PERFORMED PACK BITE TEST. FOUND FAULT WITH LT TEMP. CONTROL VALVE. REPLACED LT TEMP CONTROL VALVE REF AMM 21-51-10. OPS CHECK GOOD. PERFORMED PACK BITE TEST, NO FAULTS FOUND.