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ASN Wikibase Occurrence # 249562
Last updated: 9 April 2021
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Date:24-AUG-2020
Time:18:00 UTC
Type:Mainair Blade 912
Owner/operator:Private
Registration: G-CBJT
C/n / msn: 1302-1101-7-W1097
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Otherton Airstrip, Micklewood Lane, Penkridge, Staffordshire -   United Kingdom
Phase: Take off
Nature:Training
Departure airport:Otherton Airstrip, Penkridge, Staffordshire
Destination airport:Pound Green Airfield, Bewdley, Worcestershire
Investigating agency: AAIB
Narrative:
AAIB investigation to Mainair Blade, G-CBJT: Engine failure and forced landing after takeoff, Otherton Airfield, Penkridge, Staffordshire, 24 August 2020. The AAIB Final report was published on 8 April 2021, and the following is an ecerpt from it:

"The aircraft was taking off from Otherton Airstrip for a dual cross-country navigation exercise to Pound Green Airfield. The crew consisted of a student, who was also the aircraft owner, in the front seat and the instructor, as commander, in the rear seat.

The sortie plan was to depart Runway 25 at Otherton, with the student as PF, and climb in the overhead before commencing the cross-country route. The meteorological conditions were benign with good visibility, no cloud below 3,600 ft amsl and the wind was from 200 degrees at 3 knots.

During the takeoff roll and initial climb, engine temperatures were normal and there were no abnormal symptoms. After takeoff, the student made a left turn to a crosswind leg, avoiding overflying some ponds to reduce disturbance to people fishing.

The instructor stated that “The student made an early to port turn and the aircraft was flown to the left of the track which I normally encourage my students to follow in order to comfortably make the fields on the right of the crosswind leg in the event of an engine failure.”

However, the instructor did not correct the flightpath. The student believed he followed the line of the track as taught. Between approximately 90 and 150 ft agl, the aircraft suffered a marked power loss, and the instructor took control. In his view there was no option to land ahead and so he initiated a turn to the right, intending to land along the furrows of a potato crop in an adjacent field As the aircraft turned right, the intended approach path crossed a line of trees.

The instructor stated: “I commenced a turn between two trees with the intention of landing between them, but the skidding of the aircraft was drawing us nearer to the tree to port. I had to increase the rate of turn to avoid the tree and we lost height rapidly.” In doing so, he applied an angle of bank (AOB) of between 45° and 60⁰, with a consequent significant increase in the rate of descent.

The recollection of the impact sequence differed between the occupants. The student recalled the aircraft striking the ground while still banked to the right. The instructor recalled that, when he believed the aircraft would clear the tree, he levelled the wings at approximately 20 ft agl and then began to flare for landing.

As the aircraft struck the ground the landing gear dug in, decelerating the aircraft rapidly. Looking at the accident site later, the instructor believed the left wing struck the tree and caused the aircraft to yaw left. The instructor estimated that the aircraft only covered six metres during the impact sequence, and the time elapsed from engine failure to impact was approximately 15 seconds.

The aircraft came to rest pointing back towards the airfield, and the forward fuselage was badly damaged (Figure 2). The student suffered serious injuries, but the instructor suffered minor injuries and was able to extract himself from the aircraft. He asked some passers-by to call an ambulance and he remained with the student until the emergency services arrived to effect a rescue

AAIB Conclusion
The engine failed, for an unknown reason, at very low altitude. The instructor flew a right turn to attempt a forced landing in an adjacent crop field. The aircraft struck the ground and decelerated rapidly causing extensive damage. The student in the front seat was seriously injured."

Damage Sustained to Airframe:
Per the above AAIB report, the airframe was "Damaged beyond economic repair". The airframe was twenty years old, having been first registered on 12 December 2001.

Sources:

1. AAIB Final Report: https://assets.publishing.service.gov.uk/media/604f43e8d3bf7f1d10e50592/Mainair_Blade_G-CBJT_04-21.pdf
2. https://abpic.co.uk/pictures/registration/G-CBJT
3. https://www.afors.com/index.php?page=adview&adid=12266&imid=0
4. https://www.afors.com/index.php?page=adview&adid=12266&imid=1
5. https://en.wikipedia.org/wiki/Pound_Green_Airfield

Accident investigation:
cover
  
Investigating agency: AAIB
Status: Investigation completed
Duration: 7 months
Download report: Final report

Media:

Mainair Blade G-CBJT post-accident 24 August 2020 (top right picture)

Images:

Photo of G-CBJT courtesy AirHistory.net


Fishburn
2 October 2010; (c) Malcolm Clarke

Revision history:

Date/timeContributorUpdates
08-Apr-2021 22:27 Dr. John Smith Added
08-Apr-2021 22:28 Dr. John Smith Updated [Embed code, Narrative]
08-Apr-2021 22:28 Dr. John Smith Updated [Time]
08-Apr-2021 22:29 Dr. John Smith Updated [Embed code]
08-Apr-2021 22:32 Dr. John Smith Updated [Phase]
08-Apr-2021 23:44 Dr. John Smith Updated [Narrative]
09-Apr-2021 18:40 harro Updated [Accident report]

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