Service difficulty report · Selector Valve · Bombdr DHC8402

Difficulty date
December 7, 2009
Submitted
December 8, 2009
Operation
Air carrier
Aircraft
N188WQ
Make and model
Bombdr DHC8402
Aircraft serial
4188
Aircraft time
4,028 hours, 4,002 cycles
Part
Selector Valve
Part number
483003
Part serial
FAH0296
Condition
Leaking
Location
Nlg
Stage of operation
CL
How discovered
O
Nature of condition
O
Precautionary procedure
A

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

What was found

NOSE GEAR DOOR WILL NOT CLOSE. AIRCRAFT FERRIED TO ALB MAINTENANCE BASE, WHERE MAINT DETERMINED THAT THE LANDING GEAR SELECT VALVE WAS DEFECTIVE. ONE COIL MEASURED APPROX 43 OHMS, THE OTHER COIL MEASURED APPROX 9.5 MEGOHMS. THIS VALVE PROBLEM HAS HAD MULTIPLE OCCURRENCES IN OUR FLEET IN THE PAST, AS RECENT AS LAST WEEK IN A/C 199WQ. THE LANDING GEAR SELECT VALVE WAS REPLACED AND THE FUNCTIONAL CHECK OF THE GEAR AND DOORS WAS NORMAL.