# SDR HEEA0015522

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 13, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N6559Z
- Make and model: Bell 412
- Registry model: [Bell 412](https://openairdocs.org/model/bell-412) (OpenAirDocs)
- Aircraft serial: 36019
- System (JASC): [6240 · Main Rotor Indicating System](https://openairdocs.org/jasc/6240)
- Part: Indicator
- Part number: 412075010109
- Condition: Erratic
- Location: Triple Tach
- Stage of operation: NR
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HEEA0015522

## Discrepancy

TRIPLE TACHOMETER, ALL NEEDLES ARE ERRATIC THROUGHOUT SCALE.

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