Service difficulty report · Downlock Switch · Beech 1900D

Difficulty date
July 20, 2006
Submitted
November 29, 2006
Operation
Air carrier
Aircraft
N172MJ
Make and model
Beech 1900D
Aircraft serial
UE72
Aircraft time
20,702 hours, 30,962 cycles
Part
Downlock Switch
Part number
H111541
Part serial
NA
Condition
Failed
Location
Mlg
Stage of operation
TX
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

LANDING GEAR INDICATION CIRCUIT BREAKER POPPED TWICE. SWUNG GEAR SEVERAL TIMES AND FOUND THAT THE CB DOESN'T POP BUT THE LANDING GEAR IN TRANSIT LIGHT REMAINS ILLUMINATED EVEN THOUGH GEAR IS UP AND LOCKED. WHEN LANDING GEAR HANDLE IS SELECTED DOWN, ALL SYSTEMS OPS CHECK NORMALLY. UPON INVESTIGATION OF UPLOCK SWITCHES THE RT MLG UPLOCK SWITCH HAS SEVERAL WIRES THAT ARE CHAFED. REMOVED AND REPLACED RT MLG UPLOCK SWITCH, OPS CHECK GOOD.

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