Service difficulty report · Modulating Valve · Boeing 737890

Difficulty date
February 5, 2010
Submitted
February 9, 2010
Operation
Air carrier
Aircraft
N586AS
Make and model
Boeing 737890
Aircraft serial
35189
Aircraft time
8,819 hours, 2,921 cycles
Part
Modulating Valve
Part number
3989083
Condition
Faulted
Location
Cabin Temp
Part time
8,822 hours, 2,922 cycles
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

ON RECALL AIR COND ZONE TEMP FOR CONT CAB REMAINS ILLUMINATED. ALL LIGHTS EXTINGUISH AFTER RESETTING THE MASTER CAUTION SYSTEM. RELEASED PER MEL 21-21F. AUTH BY SEAMC. NR 2 TEMP CONT FAULTED TCU FLT DK V143, WAS ABLE TO RESET VALVE REF MM 21-61-00-700-806-80780. 02/06/2010. REMOVED AND REPLACED CONT CABIN TRIM VALVE. OPS CHECK GOOD REF 21-61-21. PARTS VERIFIED BY SEAMC. SEAMC NOTIFIED. CLEARS MEL. REMOVED PLACARD.