Service difficulty report · Modulating Valve · Boeing 737890

Difficulty date
September 18, 2014
Submitted
September 22, 2014
Operation
Air carrier
Aircraft
N536AS
Make and model
Boeing 737890
Aircraft serial
35203
Aircraft time
10,592 hours, 3,085 cycles
Part
Modulating Valve
Part number
3989083
Part serial
16570
Condition
Failed
Location
A/C Bay
Part time
10,587 hours, 3,084 cycles
Stage of operation
TX
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

AFTER START ON RECALL FWD CABIN ZONE TEMP LIGHT ILLUMINATED. LIGHT EXTINGUISHED WITH MASTER CAUTION RESET. ACFT GROUNDED. R & R FWD CABIN TRIM AIR MODULATING VALVE IAW AMM 21-61-21. OPS CK GOOD. PERFORMED BITE CK. BITE CK GOOD.