Service difficulty report · Valve · Boeing 737890

Difficulty date
March 30, 2016
Submitted
April 1, 2016
Operation
Air carrier
Aircraft
N596AS
Make and model
Boeing 737890
Aircraft serial
35688
Aircraft time
30,295 hours, 9,276 cycles
Part
Valve
Part number
3989085
Part serial
23926
Condition
Failed
Location
Rt A/C Pack
Part time
2,855 hours, 918 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

RIGHT PACK LIGHT ILLUMINATED UPON RECALL, EXTINGUISHED WITH RESET. ACFT GROUNDED. PERFORMED PACK ZONE TEMP CONTROL BITE IAW FIM 21-62, TASK 801. RT CONTROLLER FAULTED THIS PACK TCV IAW FIM 21-62, TASK 831, FAULTS RT TCV. REMOVED RT PACK TEMP CONTROL VALVE IAW AMM 21-51-10-000-801. INSTALLED TEMP CONTROL VALVE IAW AMM 21-51-10-400-801. PERFORMED INSTALLATION TEST IAW AMM 21-51-10-400-801, PARA E, INSTALL TEST IS GOOD. RAN PACKS FOR 30 MINUTES, NO FAULTS ON EITHER PACK ZONE TEMP CONTROLLERS.