# SDR HDNA20150325001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 24, 2015
- Submitted: March 25, 2015
- Operation: Air carrier
- Aircraft: [N911XC](https://openairdocs.org/aircraft/N911XC), registered now
- Make and model: Urocop EC135T1
- Registry model: [Urocop EC135T1](https://openairdocs.org/model/eurocopter-deutschland-ec135t1) (OpenAirDocs)
- Aircraft serial: 0154
- Aircraft time: 9,109 hours, 29,005 cycles
- Engine: Tmeca ARRIEL2B1
- System (JASC): [7714 · Engine RPM Indicating System](https://openairdocs.org/jasc/7714)
- Part: Indicator
- Part number: L771M40C1003
- Part serial: 0040
- Condition: Faulty
- Location: Triple Tach
- Part time: 9,999 hours, 9,999 cycles
- Stage of operation: NR
- How discovered: C
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HDNA20150325001

## Discrepancy

TRIPLE TACH INDICATOR FAILS SELF-TEST WHEN IT GETS HOT DUE TO OUTSIDE AIR TEMP BEING WARM.

---
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.