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A-139 flight crew experienced inflight failure of tail rotor deicing system. Post flight inspection revealed electrical arcing in tail rotor assembly.
| Attributes | |
| ACN | 1011091 |
| Time | |
| Date | 201205 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | Marginal |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Agusta Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Cruise |
| Route In Use | Direct |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Ice/Rain Protection System |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 35 Flight Crew Total 8000 Flight Crew Type 75 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
While on leg one of an eight leg training flight; utilized the ice protection system. We had a tail rotor degraded (half the tail rotor blades not being heated) caution light and switched system off. Turned system on again after 10 minutes; system operated ok then tail rotor degraded caution light again. Switched system off and left off for remaining seven legs. No other cockpit indications. Between leg three and leg four stopped for fuel. No abnormalities seen during walk around pre-flight. Continued leg four through leg eight. Subsequent maintenance post flight inspection revealed electrical arcing to the tail rotor assembly.
Original NASA ASRS Text
Title: A-139 flight crew experienced inflight failure of tail rotor deicing system. Post flight inspection revealed electrical arcing in tail rotor assembly.
Narrative: While on leg one of an eight leg training flight; utilized the Ice Protection System. We had a Tail Rotor Degraded (half the tail rotor blades not being heated) caution light and switched system off. Turned system on again after 10 minutes; system operated OK then Tail Rotor Degraded Caution light again. Switched system off and left off for remaining seven legs. No other cockpit indications. Between leg three and leg four stopped for fuel. No abnormalities seen during walk around pre-flight. Continued leg four through leg eight. Subsequent maintenance post flight inspection revealed electrical arcing to the tail rotor assembly.
Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.