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| Date: | Wednesday 9 January 2013 |
| Time: | 12:30 |
| Type: |  Grob G115E Tutor T1 |
| Owner/operator: | 3 EFTS RAF |
| Registration: | G-CGKC |
| MSN: | 82303/E |
| Engine model: | Lycoming AEIO-360-B1F |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Other fatalities: | 0 |
| Aircraft damage: | Substantial |
| Location: | near RAF Cranwell, Cranwell, Sleaford, Lincolnshire, England -
 United Kingdom
|
| Phase: | Landing |
| Nature: | Military |
| Departure airport: | RAF Cranwell, Lincolnshire |
| RAF Cranwell | |
| Investigating agency: | AAIB |
Two Grob 115E aircraft have suffered detachment of a Hoffman propeller counterweight assembly during initial climb at RAF Cranwell (G-BYUB in Aug 12 & G-CGKC in Jan 13), severely damaging the corresponding propeller blade. Successful forced landings were completed without injuries. Evidence from the second event suggested that the failure was due to the method of installation of the counterweight assemblies.
According to a report in the Daily Mail for 31 May 2013 all the RAF's fleet of Grob Tutors were grounded as a result if this incident, and have not flown since. This has led to a backlog in the basic flying training of all new trainee military pilots in the UK.
Accident investigation:
 |
|
Sources:
1. http://www.bbc.co.uk/news/uk-england-20961632
2. https://en.wikipedia.org/wiki/Grob_G_115#Incidents_and_Accidents
3. http://www.dailymail.co.uk/news/article-2333721/RAF-unable-teach-new-pilots-months-propellers-fall-training-aircraft-mid-flight-grounding-entire-fleet.html
4. https://www.thetimes.co.uk/article/pilot-training-halted-after-raf-planes-lose-propellers-in-flight-z3d7zgq9d6n
5. https://www.gov.uk/aaib-reports/grob-g115e-tutor-g-byub-and-grob-g115e-tutor-g-cgkc-23-august-2012
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 09-Jan-2013 11:52 | Sirjames111 | Added |
| 09-Jan-2013 17:15 | Geno | Updated [Time, Aircraft type, Registration, Cn, Source, ] |
| 09-Jan-2013 17:22 | Geno | Updated [Location, Phase, Departure airport, Destination airport, Narrative, ] |
| 09-Jan-2013 22:08 | OSUAV8R | Updated [Aircraft type, ] |
| 10-Jan-2013 10:23 | Anon. | Updated [Source, Narrative, ] |
| 10-Jan-2013 23:26 | bp | Updated [Narrative, ] |
| 11-Jan-2013 09:35 | Dr. John Smith | Updated [Operator, Embed code, ] |
| 12-Jan-2013 07:25 | Nepa | Updated [Operator, ] |
| 11-Jun-2013 18:36 | Dr. John Smith | Updated [Source, Narrative, ] |
| 12-Aug-2014 17:34 | Aerossurance | Updated [Operator, Location, Source, Narrative, ] |
| 22-Aug-2014 07:13 | Aerossurance | Updated [Damage, ] |
| 03-Oct-2018 18:10 | Aerossurance | Updated [Time, Operator, Location, Departure airport, Destination airport, ] |
| 19-Nov-2018 21:33 | Nepa | Updated [Operator, Operator, ] |
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