Service difficulty report · Control Valve · Boeing 737890

Difficulty date
April 30, 2012
Submitted
May 2, 2012
Operation
Air carrier
Aircraft
N589AS
Make and model
Boeing 737890
Aircraft serial
35686
Aircraft time
16,732 hours, 5,348 cycles
Engine
Cfmint CFM567B27
Part
Control Valve
Condition
Malfunctioned
Location
Lt Pack Temp
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 ILLUMINATED ON RECALL EXTINGUISHES W/MASTER CAUTION RESET. ACFT GROUNDED. PACK CONTROLLER BITE SHOWS TCV FAULT. TROUBLESHOT IAW FIM 21-62, TASK 848. VERIFICATION TEST OF NR 1 TEMP CONTROL VALVE NORMAL.