Service difficulty report · Valve · Boeing 737890

Difficulty date
June 16, 2011
Submitted
June 20, 2011
Operation
Air carrier
Aircraft
N517AS
Make and model
Boeing 737890
Aircraft serial
35197
Aircraft time
9,208 hours, 2,859 cycles
Part
Valve
Part number
32144464
Part serial
9842
Condition
Malfunctioned
Location
Bleed Air Sys
Part time
13,982 hours, 5,444 cycles
Stage of operation
CR
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

RIGHT SIDE BLEED TRIP OFF LIGHT CAME ON IN CRUISE. RESET PER GRH NO OTHER PROBLEMS (DID NOT TRIP AGAIN). FOUND HIGH STAGE VALVE DOES NOT MOVE SMOOTHLY REF MM 36 00 00. REPLACED HIGH STAGE VALVE REF MM 36 11 06. PERFORMED ENG BLEED SYS HEALTH CHECK REF MM 36 11 00, PERFORMED PRECOOLER CONTROL VALVE SYS HEALTH CHECK. PRECOOLER VALVE FAILED TEST. REPLACED PCCV REF MM 36 12 02. VERIFIED HEALTH CHECK, NO DEFECTS NOTED.