Date:	Saturday 15 September 2018
Time:	17:25
Type:	P & M Aviation Pegasus Quik GT450
Owner/operator:	The Scottish Aero Club Ltd
Registration:	G-DTAR
MSN:	8416
Year of manufacture:	2008
Engine model:	Rotax 912S
Fatalities:	Fatalities: 0 / Occupants: 2
Other fatalities:	0
Aircraft damage:	Substantial
Location:	Perth/Scone Airfield, New Scone, Perth, Perthshire -   United Kingdom
Phase:	Landing
Nature:	Training
Departure airport:	Perth International Airport (PSL/EGPT)
Destination airport:	Perth International Airport (PSL/EGPT)
Investigating agency:	AAIB
Confidence Rating:	Information verified through data from accident investigation authorities

Narrative:
P & M Aviation Pegasus Quik GT450, G-DTAR was substantially damaged in a Heavy landing and go-around due to wake turbulence at Perth/Scone Airfield, Perth, Scotland 15 September 2018. The official AAIB report was published on 14 March 2019, and the following in an extract from it...

"The instructor was conducting training, flying circuits using Runway 27 at Perth Airport. During a downwind leg, a helicopter departed the airport from a pad south of the runway. The wind was estimated to be from 240 degrees at less than 5 knots. The instructor discussed the wake turbulence risk but assessed that it would have dissipated before they reached the runway. When they encountered turbulence a few feet above the runway, the instructor applied full power, but the aircraft made heavy contact with the runway before continuing the go-around. In the circuit, he released the throttle which had become stuck at cruise power, before carrying out a successful glide landing.

CAA Safety Sense leaflet 15c “Wake Vortex” and NATS Aeronautical Information Circular P 001/2015, “Wake turbulence” provide pertinent information. Helicopters generate vortices radially in the hover. In forward flight, helicopters generate trailing vortices either side of the disk, much like wingtip vortices of a heavier aircraft. These descend and if they reach the ground will split and move sideways at approximately 5 kt in still air. When generated close to the ground, vortices can persist for about 80 seconds. In this case, the prevailing light winds would have been favourable for sustaining a vortex and drifting it towards the runway.

Damage sustained to airframe:
Per the above AAIB report "Damage to landing gear and minor distortion of underside". The aircraft was repaired and returned to service

1. AAIB report: https://assets.publishing.service.gov.uk/media/5c658f1f40f0b676bbd9ae21/Quik_GT450_G-DTAR_03-19.pdf
2. Pegasus Quik G-DTAR 24 June 2018: https://www.airhistory.net/photo/124732/G-DTAR
3. https://en.wikipedia.org/wiki/Perth_Airport_(Scotland)

Built 2008: First registered G-DTAR 3 October 2008 to 1st owner. Re-registered to 2nd owner 30 January 2015. Total flying time on airframe: 1,540 hours as at 17 August 2023

P & M Aviation Pegasus Quik GT450 G-DTAR at Perth/Scone Airfield, Perthshire (PSL/EGPT) 21 August 2016

Date/time	Contributor	Updates
15-Mar-2019 22:04	Dr. John Smith	Added
03-Aug-2024 06:06	Dr. John Smith	Updated [Aircraft type, Source, Embed code, Narrative, Category, ]