Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
How to ALTA<br />
a region’s<br />
safety culture<br />
AIR TRANSPORT P10<br />
THIS WEEK<br />
SAFETY DOMINIC PERRY LONDON<br />
Collision averted by sheer ‘chance’<br />
UK airprox board determines incident between RAF Typhoon and Tucano trainer constituted “very high” risk of crash<br />
pair of Royal Air Force aircraft<br />
came within “20-50ft”<br />
A<br />
of a high-speed collision in<br />
March this year, with only luck<br />
preventing an accident, UK safety<br />
investigators have determined.<br />
Disclosed by the Civil Aviation<br />
Authority’s Airprox Board<br />
(CAAB), the 12 March incident<br />
involved a formation of three Eurofighter<br />
Typhoons and a Shorts<br />
Tucano T1 turboprop trainer over<br />
RAF Coningsby in Lincolnshire,<br />
eastern England.<br />
Having observed the Typhoons<br />
approaching from astern “with a<br />
high overtake speed”, estimated<br />
at around 190kt (388km/h), the<br />
instructor in the rear seat of the<br />
Tucano was forced to initiate evasive<br />
action and take control from<br />
his student after he saw the lead<br />
aircraft “initiate a break directly<br />
towards him” from only 100-<br />
200m (330-660ft) away.<br />
“Without time to say ‘I have<br />
control’, he aggressively pushed<br />
forward on the control column<br />
and heard the jet noise of the Typhoon<br />
as it passed directly overhead<br />
in a right-hand breaking<br />
turn,” says the CAAB report.<br />
“The instructor assessed that the<br />
Typhoon’s right wing-tip was within<br />
20-50ft of the Tucano,” it says.<br />
Although the Typhoon pilots<br />
were informed of the presence of<br />
the Tucano, which had been conducting<br />
a touch-and-go manoeuvre<br />
ahead of them, “all three formation<br />
pilots perceived that the<br />
Tucano had transited down and<br />
was past the upwind end of the<br />
runway”, the report says.<br />
The Typhoon was 20-50ft away<br />
The pilot of the lead Typhoon<br />
then made a visual scan of the<br />
Coningsby runway to check for<br />
other aircraft before breaking to<br />
join the circuit to land, but did<br />
not detect the Tucano.<br />
However, the CAAB reveals, he<br />
“first saw the Tucano at the point<br />
at which he rolled right to break,<br />
directly below his aircraft” which<br />
required him to take “immediate<br />
Crown Copyright<br />
evasive action up and away”. Visibility<br />
was good at the time of the<br />
incident, at around 16:00 local.<br />
Pilots of both aircraft assessed<br />
the risk of collision as “very<br />
high”, with the CAAB classing it<br />
as a category A incident – the<br />
most serious on ICAO’s risk scale.<br />
The CAAB concludes that a<br />
number of factors were at play<br />
during the incident but “the fact<br />
that the Typhoon pilot did not<br />
gain visual contact with the Tucano<br />
before breaking into the circuit<br />
was contributory to the airprox”.<br />
The Typhoon had “flown into<br />
conflict with the Tucano”, it says,<br />
and “chance had played a major<br />
factor in the aircraft not colliding”.<br />
It emphasises that all traffic in a circuit<br />
needs to be visually identified<br />
before a break is commenced. ■<br />
10 - 11 November 2015 | Dubai World Central<br />
GATE will discuss the challenges of the growing personnel<br />
demand and shape Middle East aviation training<br />
Co-located with<br />
Visit our website for further conference, speaker and delegate information<br />
W W W . G A T E . A E R O