Service difficulty report · Downlock Switch · Beech C90

Difficulty date
July 10, 2014
Submitted
July 10, 2014
Operation
Air carrier
Aircraft
N13
Make and model
Beech C90
Aircraft serial
LJ1968
Aircraft time
1,333 hours, 704 cycles
Part
Downlock Switch
Condition
Out Of Rig
Location
Rt Mlg
Stage of operation
AP
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

ON LOWERING THE LANDING GEAR, THE RT MLG GAVE UNSAFE INDICATION. PERFORMED EMERGENCY PROCEDURES, UNEVENTFUL LANDING. CHECKED HYD PAK, MOTOR, WIRING RELAYS NO DEFECTS FOUND. CHECKED RT MLG ACTUATOR AND MLG DOWNLOCK SWITCH AND FOUND TO BE WITHIN LIMITS BUT ALSO FOUND TO BE ON OUTER EDGE OF LIMITS OPPOSITE TO EACH OTHER. RIGGED BOTH COMPONENTS TO MORE CENTER OF LIMITS ENSURING CLOSER TO EACH OTHERS TOLERANCE, CYCLED GEAR AND OPERATED WITH NO. PERFORMED TEST FLIGHT, CYCLED AND LANDED ACFT NUMEROUS TIMES WITH NO DEFECTS NOTED. RETURNED ACFT TO SERVICE.

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