Service difficulty report · Control Valve · Boeing 737890

Difficulty date
November 5, 2015
Submitted
November 9, 2015
Operation
Air carrier
Aircraft
N557AS
Make and model
Boeing 737890
Aircraft serial
35176
Aircraft time
36,217 hours, 10,722 cycles
Part
Control Valve
Part number
3989083
Part serial
8682
Condition
Failed
Location
Rt A/C Pack
Part time
36,249 hours, 10,734 cycles
Stage of operation
NR
How discovered
O
Nature of condition
O
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 COMES ON AT MASTER CAUTION RECALL. ACFT GROUNDED. PERFORMED PACK TEMP CONT BITE IAW FIM 21-62, TASK 801. RT PACK LOGGED TCV FAULT. R & R RT PACK TCV REF. AMM 21-51-10. LEAK CK GOOD. PERFORMED RT PACK TEMP CONTROL BITE TEST IAW AMM 21-61-00. BITE TEST GOOD.