SDR GUUA95632040711A

Service difficulty report · Downlock Switch · Beech 1900D

Difficulty date: April 7, 2011
Submitted: April 8, 2011
Operation: Air carrier
Aircraft: N81556
Make and model: Beech 1900D
Aircraft serial: UE239
Aircraft time: 27,186 hours, 35,031 cycles
System (JASC): 3260 · Landing Gear Position and Warning
Part: Downlock Switch
Part number: 1003810061
Condition: Shorted
Location: Mlg
Stage of operation: AP
How discovered: O
Nature of condition: P
Precautionary procedure: O

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

What was found

ON APPROACH, WHEN GEAR EXTENDED, LANDING GEAR INDICATOR CIRCUIT BREAKER TRIPPED AND LANDING GEAR HANDLE LIGHT UNABLE TO TEST, WHEN CIRCUIT BREAKER RESET 3 GREEN LOCK INDICATION AND THEN CIRCUIT BREAKER TRIPPED AGAIN. REPLACED AND ADJUSTED NLG DOWNLOCK SWITCH OPS CHECKS GOOD.

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