Accident · 2015-07-13
What the record says
- Event date
- 2015-07-13
- Event type
- Accident
- Highest injury level
- No injuries
- Aircraft
- ROBINSON HELICOPTER R22 BETA (N184SH)
- Operating rule
- Part 91
- Operator
- Alpine Aviation, Inc. Operator named in NTSB report
- Operated by (per NTSB report)
- ALPINE AVIATION LLC
Probable cause
Abnormal ground contact during a 180 degree autorotation, resulting in a severed tail rotor driveshaft by a main rotor blade. A factor contributing to the accident was the rotor blowback condition due to the aft tilting of the main rotor disk.
Source: NTSB case GAA15CA181Flight crew
Certification and experience as recorded in the NTSB accident database for this event. The NTSB records these facts about the crew's flying history; GroundCheck shows them as filed, without names or identities.
| Role | Certificate | Instrument rating | Age | Medical | Flight hours |
|---|---|---|---|---|---|
| Flight instructor pilot flying | Flight instructor / Commercial | Helicopter | 38 | Class 2 (2014-12-01) | 2,800 total · 1,800 in this make/model · 2,750 as PIC · 150 last 90 days |
| Student pilot pilot flying | Student | None | 39 | Class 2 (2015-01-21) | 94 total · 94 in this make/model · 10 as PIC · 78 last 90 days |
Facts as the NTSB records them — GroundCheck adds no judgement. Preliminary records may be revised as the investigation proceeds.