1: You’re probably Flying With Dead People (or Errant Body Parts)
The majority of domestic flights have human remains or organs on them. I work below wing as a baggage handler. Watch out the window for long boxes that say, “Head” at one end.
2. Prepare for an emergency if you hear code words “7500,” “7600,” or “7700” from crew, you’re in serious trouble
“7500” may be the worst to hear; the code means the plane has been hijacked, or that hijacking is imminent. A pilot will say “7600” if they experience radio failure or loss of communication. “7700” indicates a general emergency.
3. Airplane lavatories can unlock from the outside.
You can actually unlock the lavatory from the outside via an external lock mechanism, which is usually hidden beneath the “no smoking” sign or “LAVATORY” sign on the door.
4. You’re breathing engine air.
The air you breathe on an airplane is actually compressed air taken from the engines. A large portion (25% to 50%) is blown in the flightdeck, the rest is for the passengers. The air leaves the airplane via a small hole in the back of the fuselage.
5. Your Pilots Are (Probably) Sleeping
Pilots confess to sleeping about half the time. And a full third admit to waking up to find their co-pilot sleeping too.
6. The Oxygen Masks Will Only Help You for a Little While
If the oxygen masks drop down, you might only have about 15 minutes (the minimum set by the FAA) of oxygen from the point of pulling them down. However, that is more than enough time for the pilot to take [the plane] to a lower altitude where you can breathe normally.
7: You Really Don’t Want to Know Where Your Water Came From
Do not EVER drink water on an aircraft that did not come from a bottle. Don’t even TOUCH IT. The reason being the ports to purge lavatory shit and refill the aircraft with potable water are within feet from each other and sometimes serviced all at once by the same guy. Not always, but if you’re not on the ramp watching, you’ll never know.
Credit : Quora
Picture Credit : Google