Service difficulty report · Control Valve · Boeing 737890

Difficulty date
October 16, 2017
Submitted
October 18, 2017
Operation
Air carrier
Aircraft
N535AS
Make and model
Boeing 737890
Aircraft serial
35200
Aircraft time
26,482 hours, 7,673 cycles
Part
Control Valve
Part number
3989085
Part serial
18522
Condition
Failed
Location
Rt A/C Pack
Part time
17,440 hours, 5,782 cycles
Stage of operation
NR
How discovered
9
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

RIGHT PACK LIGHT ILLUMINATED. LIGHT EXTINGUISHED WITH RECALL RESET. SYSTEM OPERATES NORMALLY. ACFT GROUNDED. FOUND TCV FAILED ON THE RIGHT PACK. REMOVED AND REPLACED RIGHT TEMP CONTROL VALVE IAW AMM 21-51-10. LEAK AND OPS CHECKED GOOD.