Service difficulty report · Control Valve · Boeing 737890

Difficulty date
July 18, 2014
Submitted
July 22, 2014
Operation
Air carrier
Aircraft
N577AS
Make and model
Boeing 737890
Aircraft serial
35186
Aircraft time
28,017 hours, 8,403 cycles
Part
Control Valve
Part number
3989083
Part serial
8951
Condition
Malfunctioned
Location
Rt A/C Pack
Part time
27,729 hours, 8,535 cycles
Stage of operation
AP
How discovered
V
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

DURING RECALL ON LANDING CHECK LIST RT PACK LIGHT ILLUMINATED. ACFT GROUNDED. BITE CHECKED NR 2 PACK CONTROLLER REF FIM 21-62, TASK 801. FOUND RAM AIR ACTUATOR FAULT, BUT NO FAULT WITH VERIFY, RESET FAULTS AND RE-CHECKED, FAULT DID NOT RETURN. RT PACK, OPS NORMAL. REMOVED & REPLACED RT TCV IAW MM 21-51-10 OPS & LEAK CHECKED GOOD.