Service difficulty report · Control Valve · Boeing 737990ER

Difficulty date
September 16, 2018
Submitted
September 18, 2018
Operation
Air carrier
Aircraft
N493AS
Make and model
Boeing 737990ER
Aircraft serial
41727
Aircraft time
9,549 hours, 3,232 cycles
Part
Control Valve
Part number
3989085
Part serial
25814
Condition
Failed
Location
Ac Bay
Part time
9,562 hours, 3,235 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

RIGHT PACK LIGHT ILLUMINATES ON RECALL AND RESETS WITH MASTER CAUTION RESET. GROUNDED - YES. REPLACED RT PACK PRIMARY TEMP CONTROL VALVE PER AMM 21-61-21-400-801.