ASN Wikibase Occurrence # 195226
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| Date: | Friday 5 May 2017 |
| Time: | 09:30 LT |
| Type: |  Airbus Helicopters H125 (AS 350B3e) |
| Owner/operator: | Confidentia Aviation Ltd |
| Registration: | G-MATH |
| MSN: | 8274 |
| Year of manufacture: | 2016 |
| Engine model: | Turbomeca Arriel 2D |
| Fatalities: | Fatalities: 1 / Occupants: 3 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Wycombe Air Park, Booker, Buckinghamshire -
 United Kingdom
|
| Phase: | Landing |
| Nature: | Training |
| Departure airport: | Wycombe Air Park (EGTB) |
| Wycombe Air Park (EGTB) | |
| Investigating agency: | AAIB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The accident occurred whilst the helicopter was engaged in hydraulic failure training. An instructor was in the left seat of the helicopter, a pilot under training in the right seat and another pilot under training, who was a passenger on this flight, was seated in the rear.
The right-seat pilot was performing a hydraulics-off approach, to finish in a run-on landing. The instructor became dissatisfied with the approach parameters and took control in the latter stages, performing a hydraulics-off go-around into a left-hand circuit, before lining up the helicopter on final approach for the pilot to make a second attempt. Once again, the instructor took control late in the approach and performed another go-around. On this occasion, the left turn onto the downwind was flown with a higher angle of bank (AOB). The instructor was unable to control the roll attitude and the helicopter rolled left, beyond 90° AOB, descended rapidly and struck the ground, coming to rest on its left side.
All three occupants were seriously injured. The right-seat pilot died some weeks later from injuries sustained in the accident.
No technical issues were identified and a definitive reason why the instructor was unable to roll the helicopter back to a level attitude could not be determined.
The investigation concluded that clearer instructions in the AS350 flight manual for hydraulics-off flight would help prevent similar accidents in future. In response to this accident, the helicopter manufacturer has taken safety actions including: amending the AS350 flight manual to limit the AOB to 30° during hydraulics-off flight and the inclusion of warnings not to conduct low speed manoeuvres with hydraulics off due to the danger of loss of control. It has also prepared a safety video describing how to perform hydraulics-off training.
Accident investigation:
 |
|
Sources:
1. http://www.getbucks.co.uk/news/local-news/marlow-helicopter-crash-three-injured-12991021
2. https://www.maidenhead-advertiser.co.uk/news/marlow-bourne-end-flackwell/114991/man-in-life-threatening-condition-after-helicopter-crash-at-wycombe-air-park.html_
3. http://www.bbc.com/news/uk-england-beds-bucks-herts-39819302
4. https://siteapps.caa.co.uk/g-info/
5. https://bucksfire.gov.uk/latest-incidents (entry for Friday 5 May, 9.35am)
6. https://twitter.com/scas999?lang=en
7. https://www.svt.se/nyheter/utrikes/svenska-helikopterpiloter-skadade-i-krasch-i-storbritannien
8. AAIB final report: https://www.gov.uk/aaib-reports/aaib-investigation-to-as350-b3e-ecureuil-g-math
Images:
Media:
Excellent joint response to helicopter crash at Wycombe Air Park this am with @Bucksfire & @ThamesVP #oneteam https://t.co/32nHkNbrgw pic.twitter.com/reclWpnFvc
— SCAS (@SCAS999) May 5, 2017
The AAIB has sent a team to Wycombe Air Park to investigate a helicopter accident.
— AAIB (@aaibgovuk) May 5, 2017
#AAIB investigation to AS350 B3e Ecureuil, G-MATH - Loss of control during hydraulics-off training, Wycombe Air Park, Buckinghamshire, 5 May 2017.https://t.co/NGkNbLFsyw#flightsafety #helicopter #humanfactors pic.twitter.com/QM8ma9B39v
— Aerossurance (@Aerossurance) October 11, 2018
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 05-May-2017 11:32 | Aerossurance | Added |
| 05-May-2017 11:34 | Aerossurance | Updated [Source, Embed code, Narrative] |
| 05-May-2017 12:49 | Anon. | Updated [Registration, Source, Photo, ] |
| 05-May-2017 12:51 | harro | Updated [Aircraft type, Registration, Cn, Operator, Source, Damage] |
| 05-May-2017 12:53 | harro | Updated [Location] |
| 05-May-2017 15:10 | Dr.John Smith | Updated [Aircraft type, Location, Phase, Nature, Destination airport, Source, Embed code, Narrative] |
| 05-May-2017 15:21 | Aerossurance | Updated [Aircraft type, Location, Embed code, Narrative] |
| 06-May-2017 08:56 | Iceman 29 | Updated [Embed code] |
| 06-May-2017 19:16 | Masen63 | Updated [Source] |
| 07-May-2017 15:00 | Anon. | Updated [Damage] |
| 11-Oct-2018 14:06 | Iceman 29 | Updated [Nature, Departure airport, Source, Embed code, Narrative] |
| 11-Oct-2018 18:45 | Dr.John Smith | Updated [Source, Embed code, Narrative] |
| 11-Oct-2018 19:14 | Aerossurance | Updated [Time, Aircraft type, Total fatalities, Source, Narrative] |
| 11-Oct-2018 19:24 | Aerossurance | Updated [Embed code, Narrative] |
| 13-Oct-2018 19:44 | harro | Updated [Embed code, Accident report, ] |
| 20-Nov-2023 13:34 | harro | Updated [Other fatalities, Departure airport, Destination airport] |
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