Service difficulty report · Control Valve · Boeing 737890

Difficulty date
May 22, 2013
Submitted
May 29, 2013
Operation
Air carrier
Aircraft
N532AS
Make and model
Boeing 737890
Aircraft serial
36346
Aircraft time
11,507 hours, 3,533 cycles
Part
Control Valve
Part number
3989083
Part serial
1612
Condition
Failed
Location
Lt A/C Pack
Part time
62,146 hours, 35,048 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

LEFT PACK LIGHT ILLUMINATED ON RECALL, DURING LANDING CHECK. STAYED ON UNTIL PACK RESET. ACFT GROUNDED. TESTED THE LT PACK SYS IAW AMM 21-51-00-700-803. PACK/ZONE CONTROLLER SHOWED A FAULT AT THE TCV. RESET THE CONTROLLER AND RETESTED. NO FAULTS INDICATED. RAN THE PACKS THAN RETESTED, STILL NO FAULTS. DUE TO RECENT HISTORY R & R TCV IAW AMM 21-51-10-400. OPS AND LEAK CHECK GOOD.