Service difficulty report · Contactor · Emb EMB145LR

Difficulty date
December 31, 2017
Submitted
January 31, 2018
Operation
Air carrier
Aircraft
N286SK
Make and model
Emb EMB145LR
Aircraft serial
145443
Aircraft time
33,554 hours, 28,177 cycles
Part
Contactor
Part number
464CC01Y1
Part serial
6278
Condition
Burned
Location
Electrical
Stage of operation
CL
How discovered
9
Nature of condition
N
Precautionary procedure
A

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

What was found

ON DEPARTURE AND PRIOR TO ACTIVATING THE LANDING GEAR HANDLE, THE EMERGENCY LIGHTS CAME ON AND ON ACTIVATION OF THE LANDING GEAR HANDLE FOR GEAR RETRACTION, THE CREW RECEIVED AN EICAS MESSAGES FOR THE EMERGENCY LIGHT NOT ARMED & ELEC EMERGENCY ABNORMAL. EICAS MESSAGES WENT AWAY AND RETURNED WITH NO SWITCH ACTIVATION. THE CREW HEARD RELAYS FIRING BEHIND THE CO PILOT`S SEAT AND ALSO NOTICED AMPERAGE SPIKES ON THE NR 2 GENERATOR FROM 50-120 AMPS. EICAS MESSAGES CEASED AT APPROXIMATELY 50 - 100 AGL ON SHORT FINAL. LANDING WAS UNEVENTFUL. THE ONLY CMC MESSAGE DURING THE TIME FRAME WAS A NR 2 ENGINE THRUST REVERSER UP TRANS SWITCH FAIL. FOUND CONTACTOR BURNED AND A BROKEN WIRE.

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