Service difficulty report · Control Valve · Boeing 737890

Difficulty date
April 10, 2019
Submitted
April 11, 2019
Operation
Air carrier
Aircraft
N558AS
Make and model
Boeing 737890
Aircraft serial
35177
Aircraft time
48,616 hours, 14,340 cycles
Part
Control Valve
Part number
3989083
Part serial
10403
Condition
Inoperative
Location
Rt A/C Pack
Part time
42,167 hours, 12,841 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 CAUTION ILLUMINATES DURING RECALL CHECK. LIGHT RESETS. GROUNDED - YES. REMOVED AND REPLACED RIGHT PACK TCV VALVE REF B737-800 AMM 21-51-10. INSTALLATION AND LEAK CHECK GOOD. PERFORMED PACK/ZONE TEMP CONTROLLER BITE TEST REF AMM 21-61-00-700-806-002. NO FAULTS FOUND.