# SDR 96ZZZX4711

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 27, 1996
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N40CK](https://openairdocs.org/aircraft/N40CK), registered now
- Make and model: Beech B90
- Registry model: [Beech B90](https://openairdocs.org/model/beech-b90) (OpenAirDocs)
- Aircraft serial: LJ358
- System (JASC): [2437 · DC Indicating System](https://openairdocs.org/jasc/2437)
- Part: Shunt
- Part number: MS915872
- Condition: Broken
- Location: Ammeter
- Part time: 8,415 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/96ZZZX4711

## Discrepancy

MOUNTING BASE OF AMMETER SHUNT BROKE UP AROUND THE 2 MOUNTING SCREWS ALLOWING THE SHUNT TO MOVE ABOUT.  THE BASE OF THE MOUNT IS HOLLOW EXPOSING THE SCREWS THAT HOLD THE TERMINAL BLOCKS TO THE BASE.  THESE SCREWS CONTACTED THE BASE MOUNTING SCREWS ARCING TO GROUND.  THE REPLACEMENT SHUNT HAS A SOLID BASE MAKING IT STRONGER.  THERE ARE NO EXPOSED SCREWS ON THE BOTTOM OF THE BASE OF THE NEW UNIT.  BOTH SHUNTS HAVE THE SAME PART NUMBER.

---
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.