# SDR SFOA20130506001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 29, 2013
- Submitted: May 6, 2013
- Operation: Air carrier
- Aircraft: [N57SF](https://openairdocs.org/aircraft/N57SF), registered now
- Make and model: Cessna 550
- Registry model: [Cessna 550](https://openairdocs.org/model/cessna-550) (OpenAirDocs)
- Aircraft serial: 5500402
- Aircraft time: 8,504 hours, 10,985 cycles
- System (JASC): [2436 · DC Regulator](https://openairdocs.org/jasc/2436)
- 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
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SFOA20130506001

## Discrepancy

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.