Service difficulty report · Control Valve · Boeing 737890

Difficulty date
August 5, 2012
Submitted
August 8, 2012
Operation
Air carrier
Aircraft
N530AS
Make and model
Boeing 737890
Aircraft serial
36578
Aircraft time
9,213 hours, 2,855 cycles
Engine
Cfmint CFM567B273
Part
Control Valve
Part number
3989083
Part serial
9779
Condition
Failed
Location
A/C Pack
Part time
18,007 hours, 5,472 cycles
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

ON MASTER CAUTION RECALL - RT PACK LIGHT ILLUMINATED, LIGHT EXTINGUISHED ON RESET. R & R NR 2 (RT SIDE) TEMPERATURE CONTROL VALVE, HAD A HARD FAULT DURING CONTROLLER BITE CHECK. MX DONE IAW AMM 21-51-10-000-801 AND 21-51-10-400-801, OPS AND LEAK CHECK GOOD.