What happened
On 8 October 2008, a Flight Design CTSW, registration G-CFAZ, departed Manchester Barton for a solo flight to Shacklewell Lodge. After takeoff, the aircraft climbed to approximately 3,366 ft before turning right and tracking north of Manchester.
As the flight progressed, the aircraft entered a region of cloud. GPS data indicates that shortly after climbing above 3,000 ft near Delph, the aircraft began a series of manoeuvres, including a tight left turn and a subsequent descent. The aircraft struck the ground at Saddleworth Moor at a high speed, resulting in 1 fatality.
The investigation
The AAIB investigation examined the wreckage, which was discovered by farmers on the moor. The wreckage trail showed the aircraft struck the ground in a 45° to 55° right bank. The engine and propeller were recovered from beneath the surface, and examination confirmed the engine had not suffered internal failure prior to impact.
Investigators reviewed meteorological data, which indicated that while visibility was good at Barton, hill fog and low cloud were forecast for the moors. The investigation also analyzed the aircraft's GPS and multi-function display (MFD) data. Additionally, a toxicological analysis was performed on the pilot, which identified the presence of THC-COOH, a metabolite of cannabis, in the blood.
Findings
- The aircraft entered weather conditions involving low cloud and rising air over the moor, which likely led to a loss of control.
- The pilot's choice of route took the aircraft towards high ground and adjacent controlled airspace, though this was not considered a direct cause.
- The pilot's decision-making regarding weather suitability had been a previous point of concern for the flying club.
- The presence of cannabis metabolites in the pilot's system could have potentially impaired judgement, although it could not be confirmed if the pilot was under the influence at the time of the accident.
Safety action
- Safety Recommendation 2009-101: It is recommended that P&M Aviation/Flight Design review the design of the baggage restraints in the CTSW to ensure all stowed items are effectively secured.