# SDR HEER20180404921

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 4, 2018
- Submitted: April 5, 2018
- Operation: Air carrier
- Aircraft: [N440PH](https://openairdocs.org/aircraft/N440PH), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53327
- Aircraft time: 20,987 hours
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Hydraulic Line
- Part number: 70061F000X176A
- Part serial: NA
- Condition: Ruptured
- Location: Tail Rotor
- Stage of operation: NR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HEER20180404921

## Discrepancy

EXPERIENCED A LOUD SQUEAL FOLLOWED BY A HYDRAULIC CAUTION LIGHT FOLLOWED BY FEEDBACK IN FLIGHT CONTROLS.  TAIL ROTOR SERVO PRESSURE LINE RUPTURE.  REPLACED HYDRAULIC PUMP DUE TO RUN DRY.

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