Eurocopter AS350BA accident near Globe, Arizona, November 5, 2009
On November 5, 2009 at about 2:30 am local time, a Eurocopter AS350BA (helicopter), registered N617LH, was substantially damaged in an accident during approach (VFR pattern downwind) near Globe, Arizona (San Carlos Apache Airport). It was an instructional flight under general aviation rules (Part 91). 2 people were seriously injured. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The pilot receiving instruction’s failure to maintain adequate airspeed or control of the helicopter during a simulated hydraulic failure maneuver, which resulted in a hard landing. Contributing to the accident was the flight instructor’s delayed remedial actions and the lack of a positive exchange of control.
Source: NTSB aviation accident database, copy made November 2, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- November 5, 2009 · about 2:30 am local time · cases in 2009
- Place
- Globe, Arizona · San Carlos Apache Airport · cases near this airport · map
- Type
- Accident
- Injuries
- 2 people were seriously injured.
- Weather
- visual conditions (good weather)
- Aircraft
- Eurocopter AS350BA · all AS350BAs on the register
- Registration
- N617LH · registry record · serial 2140
- Damage
- Substantial damage
- Flight
- Instructional flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
During a night vision goggle (NVG) training flight, the flight instructor initiated a simulated hydraulic failure on the downwind leg for landing. The flight instructor stated that during this maneuver, the pilot receiving instruction did not properly adjust the trim and did not maintain sufficient air speed. The helicopter slowed to about 20 knots, which was half the speed the flight instructor expected. When the flight instructor heard what he believed to be the low rotor horn and heard the pilot exclaim “uh-oh,” the flight instructor tried to regain control of the helicopter; however, the helicopter impacted the ground hard. Interviews with the pilot and instructor established that both were manipulating the controls after the initial loss of control and that no positive exchange of control had occurred. The pilot reported that the last time he had performed a simulated hydraulic failure was almost 1 year before the accident and that he had never performed such a procedure or had one demonstrated while operating with NVGs. The pilot and instructor reported no in-flight abnormalities with the helicopter before the initiation of the simulated hydraulic failure, and postaccident examination of the hydraulic system components revealed no abnormalities that would have precluded normal operation.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
What happened, in order
- Loss of control in flight during approach (VFR pattern downwind) defining event
- Collision with terrain or object (not controlled flight into terrain) during uncontrolled descent
The NTSB's findings
- Personnel issues › Experience/knowledge › Training › Training with equipment › Pilot
- cause Personnel issues › Task performance › Use of equip/info › Aircraft control › Pilot
- cause Aircraft › Aircraft oper/perf/capability › Performance/control parameters › Airspeed › Not attained/maintained
- factor Personnel issues › Action/decision › Action › Delayed action › Instructor/check pilot
Flight instructor
- Certificate: commercial pilot
- Ratings: single-engine land; instructor: helicopter; instructor: instrument helicopter; instrument: helicopter; rotorcraft: helicopter
- Flight time: 13,103 hours in all; 266 in this make and model
- Last flight review: August 28, 2009
- Medical certificate: Class 2 (with waivers/limitations)
- Seat: left
- Injury: serious injuries
Pilot
- Certificate: commercial pilot
- Ratings: instructor: helicopter; instructor: instrument helicopter; instrument: helicopter; rotorcraft: helicopter
- Flight time: 2,101 hours in all; 134 in this make and model
- Last flight review: November 20, 2008
- Medical certificate: Class 1 (without waivers/limitations)
- Seat: rgt
- Injury: serious injuries
The aircraft
- Airframe total time: 4,559 hours
- Last inspection: approved inspection programme, October 31, 2009
- Maximum gross weight: 4,630 lb
- Seats: 6
- Landing gear: fixed
- Engine: Turbomeca Arriel 1B (turboshaft); 0 hours total
- Operator: Omni Flight Helicopters Inc
The flight
- Departed from: IWA Mesa AZ at 1:45 am
- Destination: P13 Globe AZ
- Runway 09, 6,500 ft by 100 ft
- A second pilot was aboard
Weather at the time
- Light: night
- Wind: from 050° at 3 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 82°F (28°C), dew point 34°F (1°C)
- Altimeter: 30.02 inHg
- Observation at 2:37 am from IWA, 49 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 2 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
16 documents, released by the NTSB on June 7, 2012. View them here, or download them; the NTSB redacts some personal details before release, and this site shows the NTSB's own titles rather than its file names.
The same docket at the NTSB · documents without a copy here are fetched from the NTSB when you open them.
Connections how this case links to the rest of the register
- N617LH on the register today · the tail number may have moved to another aircraft since
- Airbus Helicopters AS350 AStar (Écureuil), now H125 893 registered today · the model family and its accident history
- Airbus Helicopters 267 aircraft on the register
- Engine: Turbomeca Arriel 1B 18 aircraft carry this series today · as the NTSB recorded it
- San Carlos Apache Airport · nearest airport
- Mesa Gateway Airport · departed from
- Accidents and incidents in Arizona 2,985 since 1982 · 466 in the last ten years
- Arizona 8,435 aircraft registered
The whole map of how records connect · these connections as data: /graph/accident/WPR10LA046.json.
The bigger picture in Aviation Analytics: accidents over time since 1982, by model, by phase of flight and conditions, by place and on the map.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text does not name anyone involved, its policy at this time. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.