Service difficulty report · Modulating Valve · Boeing 737890

Difficulty date
December 2, 2015
Submitted
December 4, 2015
Operation
Air carrier
Aircraft
N538AS
Make and model
Boeing 737890
Aircraft serial
41188
Aircraft time
14,071 hours, 4,126 cycles
Part
Modulating Valve
Part number
3989083
Part serial
17320
Condition
Failed
Location
Cabin Temp
Part time
14,073 hours, 4,127 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

CONTROLLER CABIN ZONE TEMP LIGHT ON RECALL. ACFT GROUNDED. R & R FLT DECK TRIM MODULATING VALVE IAW AMM 21-61-21-400-801. LEAK CHECK GOOD IAW SAME REF ZONE TEMP FAULT NO LONGER ON RECALL.