# SDR 9JLA2021052729346

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 13, 2021
- Submitted: May 27, 2021
- Operation: Air carrier
- Aircraft: [N400TC](https://openairdocs.org/aircraft/N400TC), registered now
- Make and model: Beech 400A
- Registry model: [Beech 400A](https://openairdocs.org/model/hawker-beechcraft-400a) (OpenAirDocs)
- Aircraft serial: RK225
- Aircraft time: 9,364 hours, 7,458 cycles
- System (JASC): [2432 · Battery/Charger System](https://openairdocs.org/jasc/2432)
- Part: Protector
- Part number: 50284003
- Part serial: 98054
- Condition: Faulty
- Location: Battery
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9JLA2021052729346

## Discrepancy

FLIGHT CREW REPORTED THAT THE BATTERY FEED TEST DID NOT TEST CORRECTLY DURING PREFLIGHT CHECKS, FLIGHT WAS CANCELLED. THE MAINTENANCE VENDOR TROUBLESHOT AND FOUND A FAULTY BATTERY FEEDER PROTECTOR UNIT P/N 50284-003 S/N 98054. THE UNIT WAS REMOVED AND A NEW UNIT WAS REMOVED AND A NEW UNIT WAS INSTALLED. OPERATIONAL CHECKS WERE SATISFACTORY. THE AIRCRAFT WAS THEN RETURN TO SERVICE.

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