ASN Wikibase Occurrence # 179612
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| Date: | Saturday 4 August 2012 |
| Time: | 13:30 |
| Type: |  Hiller UH-12B |
| Owner/operator: | Private |
| Registration: | N38763 |
| MSN: | 497 |
| Year of manufacture: | 1953 |
| Engine model: | Franklin 6V4-200-C33 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Elstree Aerodrome, Hertfordshire -
 United Kingdom
|
| Phase: | Approach |
| Nature: | Training |
| Departure airport: | Elstree, Hertfordshire (EGTR) |
| Elstree, Hertfordshire (EGTR) | |
| Investigating agency: | AAIB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Ex-G-ATZB (first registered in the UK as such 12/9/1966); Sold 28/8/1979 and UK registration cancelled 21/1/1980, when re-registered as N38763 to a new owner in St. Petersburg, Florida. Written off (damaged beyond repair) 4/8/2012 when crashed on approach to Elstree Aerodrome, Hertfordshire during a dual training sortie. According to the following extract from the official AAIB report into the accident:
"The pilot carried out hovering practice on the airfield for about 15 minutes before translating away for a visual circuit. Weather conditions were fine, with a surface wind from the south-west at 15 kt and an air temperature of 15 degrees C. Whilst downwind, the pilot noticed a high engine oil temperature and low pressure, which had both been normal during the earlier hovering. He turned towards the grass area to the north of the runway for an immediate landing.
As the helicopter lost translational lift, the pilot noticed that main rotor rpm was reducing so he applied power to correct. However, as the rotor rpm did not recover, the pilot lowered the collective control. The helicopter descended in a slight tail-low attitude and the tail struck the ground, causing damage to the airframe and tail rotor assembly.
The pilot’s assessment was that the helicopter had lost power, compounded by the fact that the carburettor heat control had not been returned to the ‘cold’ position before the approach and landing"
Damage sustained to airframe: Damage to tail rotor, tail rotor gearbox and tail boom. All of which appear to have rendered the airframe as "beyond economical repair", as the US Registration N38763 was cancelled by the FAA on 31/3/3014 (some 19 months later)
Accident investigation:
 |
|
Sources:
1. https://assets.digital.cabinet-office.gov.uk/media/5422f188e5274a131400037b/Hiller_UH-12_B_N38763_04-13.pdf
2. http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?omni=Home-N-Number&nNumberTxt=38763
3. http://helihub.com/2012/08/04/04-aug-12-n38763-hiller-uh-12b-elstree-uk/
4. https://nnumber.org/N38763/
5. CAA: https://publicapps.caa.co.uk/docs/HistoricalMaterial/G-ATZB.pdf
6. https://www.flickr.com/photos/39860650@N02/7083241069
7. http://www.airport-data.com/aircraft/photo/000038926.html
8. https://abpic.co.uk/pictures/view/1341067/
9. https://www.pprune.org/rotorheads/512310-uk-aaib-april-2013-a.html
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 16-Sep-2015 18:01 | Dr. John Smith | Added |
| 04-Jan-2017 21:51 | Dr. John Smith | Updated [Time, Source, Narrative] |
Corrections or additions? ... Edit this accident description
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