ASN Wikibase Occurrence # 177884
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| Date: | Monday 6 July 2015 |
| Time: | 12:05 |
| Type: |  Aérospatiale SA 342J Gazelle |
| Owner/operator: | M.W. Helicopters |
| Registration: | YU-HET |
| MSN: | 1204 |
| Year of manufacture: | 1975 |
| Engine model: | Turbomeca Astazou XIVH |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Stapleford Tawney, Essex -
 United Kingdom
|
| Phase: | Standing |
| Nature: | Test |
| Departure airport: | Stapleford Tawney, Essex (EGSX) |
| Stapleford Tawney, Essex (EGSG) | |
| Investigating agency: | AAIB |
| Confidence Rating: |  Accident investigation report completed and information captured |
On 06-07-2015, an SA342J Gazelle helicopter had completed maintenance and was being ground run by a mechanic when the aircraft inadvertently became airborne. The helicopter took off to 10 feet and then dropped to the ground. MW Helicopters engineer on board was reportedly not a qualified pilot – and was not injured in the accident. Starboard skid ripped off, tail boom badly creased. The official AAIB report into the accident was published on 10-11-2016, and the following is an extract from that report:
"The helicopter was undergoing a maintenance check near to the maintenance organisation’s hangars. The engineer was ground running YU-HET and checking the hydraulic system when the incident occurred. According to his report the collective lever was fully down and he had applied full friction to the lever. He commenced the low hydraulic pressure check by activating the hydraulic test switch on the instrument panel; his left hand was on the collective lever and his feet were on the yaw pedals.
On activating the test switch the collective lever “came up violently”, the helicopter lifted about 10 feet into the air, and yawed to the right. It turned through 180 degrees and a main rotor blade struck the ground. The helicopter then landed heavily, causing significant damage to the canopy, cabin floor, tail boom, the right skid and a main rotor blade."
Accident investigation:
 |
|
Sources:
https://assets.publishing.service.gov.uk/media/57ff8e35ed915d25be000008/Sud_Aviation_SA342J_Gazelle_YU-HET_11-16.pdf
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 18-Jul-2015 08:16 | HeliNews+ | Added |
| 18-Jul-2015 08:17 | harro | Updated [Aircraft type] |
| 18-Aug-2015 14:11 | Dr. John Smith | Updated [Operator, Source, Embed code] |
| 15-Jul-2016 18:11 | Dr.John Smith | Updated [Location, Departure airport, Destination airport, Narrative] |
| 28-Jul-2016 18:10 | TB | Updated [Operator, Location, Departure airport, Destination airport, Narrative] |
| 30-Jul-2016 06:45 | Anon. | Updated [Damage] |
| 22-Sep-2016 13:40 | Aerossurance | Updated [Operator, Location, Departure airport, Destination airport] |
| 10-Nov-2016 16:41 | Dr.John Smith | Updated [Time, Operator, Location, Departure airport, Destination airport, Source, Narrative] |
| 30-Nov-2016 14:25 | Dr. John Smith | Updated [Embed code] |
| 04-Feb-2018 09:43 | TB | Updated [Time, Operator, Location, Source, Embed code] |
Corrections or additions? ... Edit this accident description
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