Service difficulty report · Modulating Valve · Boeing 737890

Difficulty date
May 10, 2021
Submitted
May 11, 2021
Operation
Air carrier
Aircraft
N506AS
Make and model
Boeing 737890
Aircraft serial
35690
Aircraft time
47,109 hours, 14,263 cycles
Part
Modulating Valve
Part number
3989083
Part serial
9902
Condition
Faulted
Location
Left Ecs Bay
Part time
47,008 hours, 14,534 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

CONT CABIN ZONE TEMP LIGHT. GROUNDED - YES. REMOVED & REPLACED FLIGHT DECK TRIM VALVE REF B737-800 AMM 21-61-21 OSP & LK CK GOOD ACCOMPLISHED BITE CK NO FAULTS FOUND.