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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

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