Service difficulty report · Check Valve · Dhav DHC6300

Difficulty date
February 11, 1999
Submitted
March 26, 2000
Operation
Air carrier
Make and model
Dhav DHC6300
Engine
Pwa PT6A27
Part
Check Valve
Part number
2650157
Condition
Failed
Location
Boost Pump
Stage of operation
IN
Nature of condition
O
Precautionary procedure
K

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

What was found

(CAN) VALVE PURCHASED NEW. INSIDE VALVE THERE IS A FLAPPER DOOR WITH A RUBBER SEAL. FLAPPER DOOR SEAL HAD SWOLLEN KEEPING THE DOOR OPEN; THUS, DEFEATING THE PURPOSE OF THE CHECK VALVE IN THE BOOSTER PUMP SYSTEM.