Have you ever noticed that if you have a reservation on a commercial airline, you almost always board and disembark on the plane’s left side? Have you ever wondered why that happens? I did. I mean, a plane isn’t like a horse (horses are trained for you to mount and dismount from their left side and if you do either on the right side, they freak out), so why only the left side? Here’s what I found out about it.
There doesn’t seem to be an “airplane rule book” that says why passengers board and disembark on a plane’s left side. But it turns out there are a quite a few hypotheses:
So the pilot can see
A plane’s pilot needs to be able to align the plane door with the terminal. (S)he usually sits on the left side of the cockpit, so it’s easier for him/her to see if the plane door on the left side is used.
Where the plane gets its fuel
The grounds crew fuels the aircraft on the right side. If the passengers are on the left side, it makes the grounds crew’s job easier (especially in cases where the passengers use stairs instead of a jetway, to board and disembark)
Where the luggage & cargo gets loaded/unloaded
Just like the fueling, baggage and cargo are loaded and unloaded on the right side. The last thing we want is for passengers to see their luggage as it’s being unloaded – you KNOW someone is going to want to take their bags RIGHT NOW.
Where cleaning & catering vehicles park
Just like all the other “work” vehicles are on the right-hand side, so are the trucks that are used for cleaning and catering.
It’s what ships do
Passengers traditionally embark and disembark from the port (left) side of a ship. As planes became commercialized, they followed suit.
By the way, it’s not always the case 100% of the time (just almost always LOL). Here are some rare exceptions to the rule:
IndiGo has recently introduced a “Three Point Disembarkation System,” where they have 2 exit ranps in the front, and 1 in the back. The second of the 2 front ramps is on right side of the plane. Here’s a short video of the process in action, from CN Traveller. It’s said to save 2 to 5 minutes.
BOAC stood for British Overseas Airway Corporation and was the British state-owned airline created in 1939 by the merger of Imperial Airways and British Airways Ltd. It stayed in business until 1974.
It also looks like the old Denver Stapleton Airport (which closed in 1995) had the potential to load/unload passengers on the right side. Look at the second from the right gate on the top row:
No word on how often that gate was used.
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