Service difficulty report · Circuit Breaker · Lear 35A

Difficulty date
May 8, 2006
Submitted
May 12, 2006
Operation
General aviation
Aircraft
N242MT
Make and model
Lear 35A
Aircraft serial
621
Aircraft time
10,053 hours, 5,883 cycles
Engine
Garrtt TFE731*
Part
Circuit Breaker
Part number
70008840
Condition
Tripped
Location
Cockpit
Part time
10,053 hours, 5,883 cycles
Stage of operation
CR
How discovered
O
Nature of condition
H, G
Precautionary procedure
B

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

What was found

(ELECTRICAL ANOMALY), LT AND RT ESSENTIAL (A) CIRCUIT BREAKERS DEPLOYED. ALL EFIS WENT DARK. YAW DAMP AND AUTO PILOT DISENGAGED. LOST ALL NAV AND COMM. RADIOS, LOST ANNUNCIATOR PANEL LIGHTS. MAY HAVE LOST AIRSPEED INDICATORS AND FUEL COMPUTERS. LOST BOTH N 1’S . BOTH ITT’S, DC AND AC ELECTRICAL INDICATORS FUNCTIONED NORMALLY AND INDICATED NORMAL ELECTRICAL SYSTEM CONDITION. GEAR, FLAPS, SPOILERS, TRIMS, TR’S ALL FUNCTIONED NORMALLY. TR ARM AND DEPLOY LIGHTS DID NOT WORK.

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