Service difficulty report · Control Valve · Boeing 737890

Difficulty date
October 22, 2014
Submitted
October 24, 2014
Operation
Air carrier
Aircraft
N588AS
Make and model
Boeing 737890
Aircraft serial
35685
Aircraft time
26,618 hours, 8,159 cycles
Part
Control Valve
Part number
3989083
Part serial
11358
Condition
Malfunctioned
Location
Lt A/C Pack
Part time
18,761 hours, 5,750 cycles
Stage of operation
TX
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 ILLUMINATES DURING RECALL, RESETS W/MC RESET. ACFT GROUNDED. NR 1 TEMP CONTROLLER BIT & LAST FLIGHT REVIEW SHOWS "THIS PACK TCV FAULT". REPLACED LT PACK TCV WITH NEW REF: AMM 21-51-10. INTERROGATED PACK ZONE TEMP CONTROLLER AND ALL FAULTS CLEAR. REF: AMM 21-61-00.