Service difficulty report · Relay · Beech F33A

Difficulty date
April 6, 2013
Submitted
May 3, 2013
Operation
General aviation
Aircraft
N8251C
Make and model
Beech F33A
Aircraft serial
CE1543
Aircraft time
22,275 hours
Engine
Cont IO520*
Engine time
1,675 hours
Propeller
Hartzl PHCC3YF1
Part
Relay
Part number
SM50D7
Part serial
MFD1219
Condition
Intermittent
Location
Mlg
Part time
142 hours
Stage of operation
LD
How discovered
O
Nature of condition
B
Precautionary procedure
H

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

What was found

DURING THE SECOND LANDING AT AIRPORT, THE CREW SELECTED GEAR DOWN, THE GEAR SHOWED DOWN AND LOCKED AND CREW SAW AND SMELLED SMOKE. THE LANDING GEAR CIRCUIT BREAKER TRIPPED AFTER GEAR COMPLETED CYCLE. MX CONFIRMED SOURCE OF SMOKE WAS FROM THE LANDING GEAR ACTUATOR MOTOR. WE BELIEVE THE DYNAMIC BRAKE RELAY CAUSED THE LANDING GEAR MOTOR TO OVERTRAVEL AGAINST HARD STOP AND SMOKE. SAME PROBLEM THREE TIMES IN PAST FOUR MONTHS. WE'RE CURRENTLY WORKING DIRECTLY WITH RELAY MFG AND ACFT MFG.

More about the Beech F33A