# SDR 99ZZZX1004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 2, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N421SR](https://openairdocs.org/aircraft/N421SR), registered now
- Make and model: Cessna 421C
- Registry model: [Cessna 421C](https://openairdocs.org/model/cessna-421c) (OpenAirDocs)
- Aircraft serial: 421C1215
- System (JASC): [2400 · Electrical Power System](https://openairdocs.org/jasc/2400)
- Part: Terminal Strip
- Part number: MS2742Z4
- Condition: Failed
- Location: Electrical Sys
- Part time: 2,232 hours
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX1004

## Discrepancy

CONNECTOR LUGS ON CABLES FROM ALTERNATORS TO TERMINAL STRIP CORRODED CAUSING HIGH RESISTANCE AND OVERHEATING UNDER FULL ALTERNATOR LOAD, NR 1 TERMINAL POST MELTED AWAY FROM TERMINAL STRIP ALLOWING PRIMARY DC WIRING TO CONTACT AIRFRAME STRUCTURE.  RESULT:  DUAL ALTERNATOR FAILURE, VERY RAPID BATTERY DISCHARGE.  SUBMITTER STATED TOTAL ELECTRICAL FAILURE RISK OF FIRE.

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