ASN Wikibase Occurrence # 215956
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| Date: | Tuesday 2 October 2018 |
| Time: | 11:15 |
| Type: |  Grob G115E Tutor T1 |
| Owner/operator: | VT Aerospace Ltd./RAF |
| Registration: | G-BYUU |
| MSN: | 82105/E |
| Year of manufacture: | 1999 |
| Engine model: | Lycoming AEIO-360-B1F |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Minor |
| Location: | near RAF Wittering, Cambridgeshire, England -
 United Kingdom
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Military |
| Departure airport: | RAF Wittering, Cambridgeshire |
| Wittering RAF Station (EGXT) | |
| Investigating agency: | AAIB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot noted an uncommanded reduction in engine speed when returning to Wittering after a successful air test following an engine change. The engine initially recovered but, when the speed reduced again, the pilot made a PAN call. A further loss of power meant that he was unable to maintain height and he transmitted a MAYDAY and prepared to land in a field. The engine stopped prior to the landing, which was accomplished without damaging the aircraft.
Examination found that the engine oil sump drain cap was missing. Loss of the cap resulted in an oil leak and engine seizure. There is no requirement for the oil cap to be wire locked on the Grob 115E, which is equipped with a modified (inverted) engine oil system to cater for aerobatic manoeuvres.
The maintenance organisation considered that the most likely scenario is that the drain cap was not correctly secured after the engine was installed. The maintenance organisation is reviewing their procedures and, as part of their continuous airworthiness management, is liaising with the manufacturer about an alternative cap that can be wire locked. In the interim, they have introduced an independent check to ensure that the cap is correctly refitted
Damage sustained to airframe: Per the AAIB report the damage was restricted to a non-specific "Engine failure"
Accident investigation:
 |
|
Sources:
1. https://www.stamfordmercury.co.uk/news/tutor-aircraft-makes-false-landing-near-raf-wittering-9045680/
2. https://www.peterboroughtoday.co.uk/news/emergency-services-attend-false-landing-near-raf-wittering-1-8654249
3. https://www.flightradar24.com/data/aircraft/g-byuu#1e11f4dc
4. AAIB: https://assets.publishing.service.gov.uk/media/5c111667ed915d0b7f404151/Grob_G115E_Tutor_G-BYUU_01-19.pdf
5. CAA: https://siteapps.caa.co.uk/g-info/
6. https://www.planelogger.com/Aircraft/Registration/G-BYUU/892431
7. https://www.jetphotos.com/photo/6355915
8. https://www.airplane-pictures.net/photo/31357/g-byuu-vt-aerospace-grob-g115-tutor-heron/
Media:
⚪️ UK - East Northamptonshire - Emergency services were called after a Grob G-115E Tutor T1 training aircraft, based at RAF Wittering, made a false landing near the base.https://t.co/3puClhqN2J pic.twitter.com/13RZtgp6OG
— Planes Of Legend (@PlanesOfLegend) 2 octobre 2018
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Oct-2018 17:30 | Sirjames111 | Added |
| 02-Oct-2018 17:32 | harro | Updated [Aircraft type, Cn, Damage, Narrative] |
| 02-Oct-2018 19:04 | Iceman 29 | Updated [Time, Source, Embed code, Narrative] |
| 02-Oct-2018 19:05 | Iceman 29 | Updated [Location, Embed code] |
| 02-Oct-2018 21:35 | Geno | Updated [Departure airport, Destination airport] |
| 03-Oct-2018 17:51 | Aerossurance | Updated [Aircraft type, Operator, Location, Narrative] |
| 10-Jan-2019 20:15 | harro | Updated [Departure airport, Destination airport, Narrative, Accident report, ] |
| 10-Jan-2019 22:05 | Dr. John Smith | Updated [Time, Operator, Location, Source, Damage, Narrative] |
| 24-Dec-2019 09:51 | stehlik49 | Updated [Operator, Departure airport, Operator] |
| 09-Jul-2023 21:10 | Nepa | Updated [[Operator, Departure airport, Operator]] |
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