# SDR TRBA2011098

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 20, 2011
- Submitted: July 6, 2011
- Operation: Air carrier
- Aircraft: N420AT
- Make and model: Aerosp ATR 72-212
- Registry model: [Aerosp ATR 72-212](https://openairdocs.org/model/aerospatiale-atr-72-212) (OpenAirDocs)
- Aircraft serial: 420
- Aircraft time: 30,386 hours, 32,780 cycles
- System (JASC): [6123 · Propeller Feathering/Reversing](https://openairdocs.org/jasc/6123)
- Part: Autofeather Sys
- Condition: Malfunctioned
- Stage of operation: AP
- How discovered: O
- Nature of condition: F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TRBA2011098

## Discrepancy

DURING APPROACH, AT FLIGHT LEVEL 200 THE CREW REPORTED THE RT ENGINE WENT TO UNCOMMANDED FEATHER, BOTH PROPS /CONDITION LEVERS MAX RPM ,TORQUE SHOWED 0, NP 70 , ITT 400 ISH.  THE ACFT WENT THROUGH ANOTHER ACFT’S WAKE TURBULANCE ABOUT 600 '.  ACFT LANDED WITHOUT INCIDENT &  REMOVED FROM SERVICE.  R & R RT THE HIGH ENGINE AUTO FEATHER UNIT IAW MM 72-01-10. THE OPS CHECKED GOOD IAW JIC 72-00-00-OPT-10000 AND 61-00-00-OPT-10000. THE ACFT WAS RETURNED TO SERVICE.

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