Service difficulty report · Current Limiter · Cessna 550

Difficulty date
April 29, 2013
Submitted
May 6, 2013
Operation
Air carrier
Aircraft
N57SF
Make and model
Cessna 550
Aircraft serial
5500402
Aircraft time
8,504 hours, 10,985 cycles
Part
Current Limiter
Part number
ANL225
Condition
Failed
Location
Electrical Sys
Part time
4,000 hours, 4,000 cycles
Stage of operation
TX
How discovered
O
Nature of condition
H
Precautionary procedure
K

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

What was found

UPON INITIATING START OF THE LT ENGINE, NOTHING HAPPENED. NONE OF THE LT ENGINE INSTRUMENTS HAD POWER AND THERE WERE SEVERAL OTHER SYSTEMS THAT WOULD NOT OPERATE AS WELL. INVESTIGATION REVEALED LT MAIN CURRENT LIMITER (FL1) HAD FAILED. NO OVERHEATING AT THE LIMITER WAS EVIDENT. CURRENT LIMITER WAS REPLACED. POWER UP INSPECTION WAS MADE AND A NORMAL START INITIATED WITH NO ANOMALIES DETECTED. THE AIRCRAFT WAS THEN RETURNED TO SERVICE AFTER A FULL, ENGINES RUNNING, SYSTEMS CHECK.

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