Service difficulty report · Control Valve · Boeing 737890

Difficulty date
May 16, 2019
Submitted
May 20, 2019
Operation
Air carrier
Aircraft
N587AS
Make and model
Boeing 737890
Aircraft serial
35684
Aircraft time
44,537 hours, 12,937 cycles
Part
Control Valve
Part number
3989085
Part serial
9870
Condition
Failed
Location
Ac Bay
Part time
41,906 hours, 13,267 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

PACK LIGHT ON WITH RECALL. RESETS WITH MASTER CAUTION. GROUNDED - YES. PERFORMED PACK ZONE TEMP CONTROL BITE PER AMM 21-61-00 FAULTED LT PACK TCV. REMOVED TCV PER AMM 25-51-10-000-801. INSTALLED TCV PER AMM 21-51-10-400-801 OPS TEST IS GOOD BITE TEST IS GOOD AND LEAK CHECK IS GOOD.