In the pursuit of universal stable approaches we have tended to focus on the pilots and how they elect to operate their aircraft - see my earlier posts on the subject. On the other hand, we have known for a long time that ATC can have a significant influence on achieving a stabilised approach but I haven't seen that influence clearly quantified in the past.
At the Airborne Conflict safety forum at Eurocontrol in Brussels this week I learnt a new term: the 'non-compliant approach'. To understand what that is, it is necessary to define a 'compliant approach' and precisely what it is that the approach should comply with. Well our friends at Skybrary http://www.skybrary.aero/index.php/Main_Page have done that pretty well in the page below.
The most interesting fact from the forum was that every day there are thousands of non-compliant approach clearances issued by ATC; some recent research recorded 4,000 in a single month at Paris CDG alone. As a factor in unstabilised approaches, a major contributor to both CFIT (controlled flight into terrain) and runway excursions, that has to be significant. I wasn't aware for instance that the crash of a Turkish Airlines 737 on short final at Schiphol in 2009 was preceded by a non-compliant approach clearance...
At the Airborne Conflict safety forum at Eurocontrol in Brussels this week I learnt a new term: the 'non-compliant approach'. To understand what that is, it is necessary to define a 'compliant approach' and precisely what it is that the approach should comply with. Well our friends at Skybrary http://www.skybrary.aero/index.php/Main_Page have done that pretty well in the page below.
The most interesting fact from the forum was that every day there are thousands of non-compliant approach clearances issued by ATC; some recent research recorded 4,000 in a single month at Paris CDG alone. As a factor in unstabilised approaches, a major contributor to both CFIT (controlled flight into terrain) and runway excursions, that has to be significant. I wasn't aware for instance that the crash of a Turkish Airlines 737 on short final at Schiphol in 2009 was preceded by a non-compliant approach clearance...
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