# SDR CA190201017

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 31, 2019
- Submitted: August 13, 2020
- Operation: General aviation
- Make and model: Cessna 172N
- Registry model: [Cessna 172N](https://openairdocs.org/model/cessna-172n) (OpenAirDocs)
- Aircraft time: 22,636 hours
- Engine: Lyc O320D2J
- System (JASC): [2434 · DC Generator-Alternator](https://openairdocs.org/jasc/2434)
- Part: Alternator
- Part number: D0FF10300B
- Condition: Inoperative
- Location: Dc
- Stage of operation: CR
- How discovered: O
- Nature of condition: H
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA190201017

## Discrepancy

(CAN) AT CRUISE RETURNING TO BASE CREW NOTICED ALTERNATOR DROPPED OFF. CREW CHECKED SWITCH AND CIRCUIT BREAKER. CHECKED OK. ON FINAL INTO CYBW INTERMITTENT FLAPS, RADIO AND LIGHT FAILURES. UPON INVESTIGATION AND INSPECTION THE POWER TERMINAL TO THE ALTERNATOR HAD SNAPPED OFF AND WAS ARCHING TO THE ALTERNATOR. THE BATTERY WAS DRAINED BEYOND RECOVERY AND WAS REPLACED WITH NEW. THE ALTERNATOR WAS REPLACED AND ALTERNATOR WIRING REPAIRED AS REQUIRED. FUNCTION CHECKS CARRIED OUT WITH NO FURTHER DEFECTS.

---
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.