Service difficulty report · Sequence Valve · Bombdr DHC8400

Difficulty date
October 12, 2010
Submitted
January 4, 2011
Operation
Air carrier
Make and model
Bombdr DHC8400
Engine
Pwc PW150A
Propeller
Rotol CR4086123F17
Part
Sequence Valve
Part number
483025
Condition
Faulted
Location
Nlg
Part time
393 hours
Stage of operation
CR
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

ONCE IN THE CRUISE THE LANDING GEAR INOP CAUTION LIGHT CAME ON, AFTER ABOUT 30 SECONDS IT WENT OFF AGAIN AND PROCEEDED TO DO THIS 3 TO 4 TIMES. IT THEN CAME ON AND REMAINED ON. THE FOLLOWING FAULT CODES WHERE RETRIEVED FROM THE PSEU, AS IAW FIM 32-10-00: PSEU CHAN A FAIL DOT04A FAIL (2) DOT04A LOAD FAULT RESISTANCE TEST HAS NARROWED DOWN THE SOURCE OF THE FAULT TO THE NLG SOLENOID SEQUENCE VALVE, SSV REPLACED.