Service difficulty report · Control Valve · Boeing 737890

Difficulty date
May 18, 2012
Submitted
May 21, 2012
Operation
Air carrier
Aircraft
N566AS
Make and model
Boeing 737890
Aircraft serial
35181
Aircraft time
20,545 hours, 6,357 cycles
Engine
Cfmint CFM567B27
Part
Control Valve
Part number
3989083
Part serial
2578
Condition
Malfunctioned
Location
Pack Temp
Part time
49,946 hours, 22,711 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

PACK LIGHT ILLUMINATED WITH RECALL. ACFT GROUNDED. NR1 TEMP CONTROL SHOWS TCV FAULT LAST FLT. REPLACED LT TEMP CONTROL VALVE REF MM 21-51-10. OPS CHECK IS GOOD. BITE CHECKED GOOD, REF MM 21-61-00.