Service difficulty report · Control Valve · Boeing 737990ER

Difficulty date
October 8, 2018
Submitted
October 12, 2018
Operation
Air carrier
Aircraft
N479AS
Make and model
Boeing 737990ER
Aircraft serial
60576
Aircraft time
13,247 hours, 4,381 cycles
Part
Control Valve
Part number
3989083
Part serial
12176
Condition
Faulted
Location
Ac Bay
Part time
24,158 hours, 17,528 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

ON MASTER CAUTION RECALL, RIGHT SIDE PACK LIGHT ILLUMINATED. LIGHT EXTINGUISHED ON MASTER CAUTION RESET. GROUNDED - YES. PERFORMED PACK TEMP CONTROL BITE REF FIM 21-62 TASK 801. RIGHT PACK HAS FAULT: "THIS PACK TCV". FAULT RESET. DUE TO HISTORY, REMOVED/REPLACED RH PACK TCV REF AMM 21-51-10. OPS CHECK GOOD.