Service difficulty report · Check Valve · Bombdr DHC8402

Difficulty date
November 21, 2010
Submitted
November 29, 2010
Operation
Air carrier
Aircraft
N420QX
Make and model
Bombdr DHC8402
Aircraft serial
4147
Aircraft time
9,586 hours, 10,464 cycles
Part
Check Valve
Condition
Malfunctioned
Location
Mlg
Stage of operation
CL
How discovered
O
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

AFTER NORMAL GEAR RETRACTION THE LT RED (UNSAFE) GEAR LIGHT ILLUMINATED FOR 5 SECONDS THEN EXTINGUISHED. THE LT AMBER (DOOR) LIGHT THEN ILLUMINATED FOR 5 SECONDS THEN EXTINGUISHED. C/W TC- SB84-32-81 ON WO 110090, REPLACEMENT OF INLINE RESTRICTOR WITH CHECK VALVE - MODSUM 4-113671. C/W LANDING GEAR OPS CHECK IAW AMM TASK 32-31-00-710-801. CHECKS GOOD. C/W MANY GEAR SWINGS, FOUND NO FAULTS IN PSEU, COULD NOT DUPLICATE, GEAR LIGHTS NORMAL. RETURNED TO SERVICE.