Service difficulty report · Valve · Boeing 737990ER

Difficulty date
December 1, 2018
Submitted
December 6, 2018
Operation
Air carrier
Aircraft
N448AS
Make and model
Boeing 737990ER
Aircraft serial
36356
Aircraft time
10,761 hours, 3,596 cycles
Part
Valve
Part number
3989085
Part serial
26394
Condition
Failed
Location
Ac Bay
Part time
10,795 hours, 3,608 cycles
Stage of operation
NR
How discovered
O
Nature of condition
J
Precautionary procedure
K

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

What was found

LEFT PACK LIGHT ILLUMINATES DURING RECALL. GROUNDED - YES. REMOVED & REPLACED LEFT PACK TCV, V139, REF AMM 21-51-10-400-801. LEAK CK GOOD PER THE SAME. ACCOMPLISHED PFTC BITE TEST REF AMM 21-61-00-740-801-002. GROUND TEST PASSED WITH NO FAULTS.