Here is a remarkable video for training purpose. It is not easy to understand how air traffic is managed at Heathrow airport but this video helps a lot to make out the stakes: Voici une vidéo remarquable à but pédagogique. Il n’est pas facile de comprendre comment la circulation aérienne est gérée à l’aéroport de Heathrow mais cette vidéo est d’une grande aide pour comprendre les enjeux:
Note that there are four stacks in the vicinity of London. The word « stack » means « holding pattern » here. However, stack can mean another thing in aeronautical and general English. For instance:
Notez qu’il y a quatre « stacks » aux environs de Londres. Le mot « stack » signifie ici « circuit d’attente ». Cependant, stack peut vouloir dire autre chose en anglais aéronautique et général. Par exemple:
Stack of folders = Pile de dossiers
Smokestack = Cheminée d’usine
Hay stack = Botte de foin, meule de foin
Radio stack = Equipement radio à bord de l’avion (radio com, radio nav, transponder)
Wood stack = Tas de bois
Stack up / Stack down = Espacement décalé vers le haut ou vers le bas entre des avions de chasse ou d’acrobaties aérienne
Vent stack = Colonne de ventilation
To stack = Empiler, entasser
Stack = Circuit d’attente dans l’espace aérien londonien pour les avions à destination d’Heathrow
Note that easterly operations match westerly winds, and westerly operations match easterly winds.
Notez que les opérations d’est correspondent aux vents d’ouest, et que les opérations d’ouest correspondent aux vents d’est.
Juancho E. Yrausquin Airport (IATA: SAB, ICAO: TNCS) on the island of Saba, in the Netherlands Antilles is located on a small plateau above the Caribbean Sea. Its runway is very short – 400 meters long.
Toncontin International Airport (IATA: TGU, ICAO: MHTG) or Teniente Coronel Hernan Acosta Mejia Airport – at one thousand metres altitude – is located in a hollow on the outskirts of Tegucigalpa, Honduras. Its 2,021-meter long runway – even though it was extended in 2009 as it was 1,863 metres long only – is one of the shortest ones among the international airports. A very dangerous hillside at the end of the runway was removed in 2009 too. This airport was ranked second in this top 10 before.
Gibraltar International Airport or North Front Airport (IATA: GIB, ICAO: LXGB) is located in the British overseas territory of Gibraltar, and belongs to the UK Ministry of Defence though it is a civilian airport too. There are around 3,000 aircraft movements per year. The main road intersects the airport runway, and the road traffic is stopped whenever an airplane takes off, or lands.
Los Roques Airport, or Aeropuerto Los Roques, in Spanish (IATA: LRV, ICAO: SVRS). It is a domestic airport with a one-kilometre long runway on the El Gran Roque island, Venezuela.
Saint Maarten International Airport (IATA: SXM, ICAO: TNCM) (also known as Princess Juliana International Airport) is located on the Dutch part of the island of Saint Martin. Viral videos, and pictures are regularly posted on the Web as the runway threshold is only a few meters from the beach, and tourists can feel the turbulence, and even the blast of heavy aircraft when they land, or take off.
Madeira Airport (IATA: FNC, ICAO: LPMA), or Funchal Airport (as Funchal is the name of the nearest cathedral), is an international airport in Santa Catarina, Santa Cruz, Madeira, Portugal. Its two runways are a bit short, and surrounded by the Atlantic Ocean, and mountains.
Foreign Object Damage (FOD) can be caused by Foreign Object Debris (called FOD too). FOD can also mean « Foreign Object Detection« . Watch the video, and read its transcript below:
Our Air Force has the most technically advanced aircraft in the world – deadly fighters, and bombers, mighty cargo and tanker workhorses, our many helicopters, and a variety of specialty aircraft.
But they can all be easily grounded by FOD.
Foreign objects cause damage to our aircraft in many ways. For example, cut tires, and jammed flight or engine controls. FOD has caused at least six fighter aircraft to crash over the last twelve years! Some of the items that caused these mishaps were:
Safety wire pliers;
A piece of aluminum foil;
A one-inch piece of safety wire;
Even a small washer!
These incidents show that poor housekeeping, and work practices are still the two major contributors to preventable FOD. We can eliminate FOD. To do so, we must make these six commonsense steps, part of our every job, every step, every day.
The first step – be aware that you can make a difference, and that FOD is a constant problem. Every time you sign out a tool box, work a job, or just step out to help someone, keep your eyes open for tools, rocks, and other debris. And when you see something, stop, and pick it up. Occasionally, you may need a sweeper to clean up an area. MAC usually coordinate with base OPS. MAC (Military Airlift Command) usually coordinates this support with base OPS.
The second step – keep your work area clean. Check your shoes for foreign objects, and empty your pockets of keys, change, pencils, and trash. Place these items into a FOD bag before entering the cockpit, intake, other confined areas, or before working on top of the aircraft. Are you covering all of those lines, houses, cannon plugs, and ducts during extended maintenance? The ACES II ejection seat is the most reliable, and safest seat in the world, as long as nothing gets in the way. Somebody did not report losing this pencil tip. It then migrated in flight to the sequence start switch which activates the seat computer as it departs the aircraft. It was discovered during a visual inspection of the seat when it was removed for other maintenance. Because of the protective shield over the switch, and the tight clearance in the cockpit, it normally would never have been found. How do you think the pilots felt when they heard about it? Do you check the area one more time before you leave? It is possible the person before you left something behind.
Step three – we have to keep our vehicles clean. We know foreign objects get around, and many times are, vehicles carry them out to the flight line. Tire checks – are you constantly doing them every time you went to the flight line? How about after you drove out of the taxiway to let the jet pass? How clean is your vehicle? Is there safety wire, trash, or fasteners on the floor? Is the FOD can overflowing before you empty it? If you have a vehicle magnet installed, are you checking it daily?
Step four – Thorough FOD walks. Are you looking, or are you out there just stretching your legs? Pay special attention to the grounding points, and cement grooves, and cracks. These areas are always filling up with trash, rocks, and hardware. A good daily FOD walk helps us keep up with all the debris that still manages to get onto the ramp. A FOD walk should have found this bolt. Instead, it was sucked up, off of the ramp by a B-1. Three first-stage compressor blades, and one inlet guide vane were damaged. It cost us 56 man-hours, and over $ 35,000 to remove and fix this engine.
Step five – good tool and hardware control is a must. Remember the last time you lost a tool, or a nut? How long did you look for it? Did you find it? When was the last tool report started? Remember – tool control starts when you receive a toolbox. Before you sign for it, make sure all missing tools are written up, and check the box for pieces of safety wire, and other trash. Woe, slow down, and look. Is that a tool, or the tool cutout? If you find a tool missing, don’t accept the box, and make sure a last tool report, and investigation is started. Also, never leave tools in hardware in or on the aircraft. Do a good inventory of your toolbox, and TOs* after every job. This alone will narrow the search area, and greatly increase your chances of finding a last tool. Think about it, what would you rather check? One aircraft, or three? When you do find a tool missing, start looking for it immediately. If you can find it after a short search, report it immediately to the expediter, or dock chief, and get some extra help to look for the missing tool or hardware. For tight or inaccessible areas, you can also use a borescope** or X-ray equipment to locate lost items. How would you tell the pilot if the jet has just taxied? What if it is flying? A file about this size was left behind after blending two engine blades on a C-5, possibly fallen behind a nacelle blocker door*** during the job. Four people then signed for the box over the next several days before someone finally noticed, and reported the last tool. The file was not located, and then came loose in flight the next day. This incident caused over 550 men-hours of work, and $ 66,000 in damage to the engine. Hardware control is simply taking only what you need, and counting how many nuts, bolts, or other hardware you take from bench stock. After the job, make sure you account for all the hardware. If you don’t complete the job, annotate the screw bag with the quantity, the type of hardware, and your name. This will help the person who finishes the job track down any missing hardware. Here is what a misplaced ¼ inch nut did to a C-130 engine. Over 30 blades were damaged beyond repair, not counting depot costs – the damages have already taken 64 man-hours, and exceeded $ 38,000 in damages. Sometimes, we accidentally leave items inside the intake danger area, or in the intake before an engine start. These have included VTR tapes, flashlights, cleaning bottles, and aircraft forms. Are you paying attention? Or have you just been lucky?
Step six – follow the T.O.. For tight or inaccessible access areas, you can also use a borescope, or X-ray equipment to locate lost items. How would you tell the pilot if the jet has just taxied? What if it is flying? A file about this size was left behind after blending two engine blades on a C-5, possibly fallen behind a nacelle blocker door*** during the job. Four people then signed for the box over the next several days before someone finally noticed, and reported the last tool. The file was not located, and then came loose in flight the next day. This incident caused over 550 men-hours of work, and $ 66,000 in damage to the engine. Hardware control is simply taking only what you need, and counting how many nuts, bolts, or other hardware you take from bench stock. After the job, make sure you account for all the hardware. If you don’t complete the job, annotate the screw bag with the quantity, the type of hardware, and your name. This will help the person who finishes the job track down any missing hardware. Here is what a misplaced ¼ inch nut did to a C-130 engine. Over 30 blades were damaged beyond repair, not counting depot costs – the damages have already taken 64 man-hours, and exceeded $ 38,000 in damages. Sometimes, we accidentally leave items inside the intake danger area, or in the intake before an engine start. These have included VTR tapes, flashlights, cleaning bottles, and aircraft forms. Are you paying attention? Or have you just been lucky?
6. Step six (again and further) – Follow the T.O.. Several times we have had equipment, and panels come off during an engine run, or in flight, causing serious damage. On the last job before a three-day weekend, an experienced crew chief and his assistant were preparing an F-16 for an engine run. He skipped the warning, and the step to check the run screen safety pin for security. During the engine run, one pin came out, and after whipping around in the intake for a few seconds, the lanyard broke. The pin destroyed over 426 blades. Total cost – $ 69,000 and 366 man-hours. What was the cost of the crew chief? How do you think he felt? Think of what he went through. The de-certification, the investigation, the waiting. Was the two or three seconds saved worth it? Sometimes, confusing or incomplete TOs are part of the problem. Improper installation caused by poor tech aide, and inexperience created a stress crack in the upper anti collision light lens in a KC-10.
* T.O.: Technical Order
** (or boroscope)
*** Thrust reverser (pelle d’inverseur de poussée)
July 6, 2011 – The legendary Hong Kong Kai Tak International Airport could have been inserted into this list but it closed down on July 6th, 1998 i.e. exactly 13 years ago, and this top ten gathers airfields still in service only. Gibraltar airport could have been part of it as a route (yes, you’ve well read) crosses its runway.
It must be very difficult to set up such ranking. This is what AirfareWatchdog has tried to do. Among them, a striking view of Courchevel airport at an altitude of 2,008 m featuring a steep slope in the middle of its runway.