Frequently Asked Questions As you sit back in comfort en route to your destination, the Rex crew hope you enjoy this interesting and informative light reading.
Q. Why do the flight attendants insist that all window blinds be up for take-off? A. The most critical phases of a flight are the take-off and the landing. In the most unlikely event of a situation that requires an emergency evacuation, it is important that crew and passengers are able to have a clear view of the outside conditions in case of obstructions. For example, before exits are opened, staff must check for fire or other obstacles that may present potential hazards during the evacuation. Q. Why do you have to stow your hand luggage in the overhead lockers, under the seats or in the seat pockets for take-off and landing? A. Flight crews are required by Civil Aviation Regulations to secure the cabin as well as possible for take-off and landing. As mentioned, these are the most critical phases of the flight and securing as much hand luggage as possible ensures that in the unlikely event of an emergency, the exits and aisles stay as clear as possible, in case evacuation is necessary. It is also important to keep hand luggage secure whenever possible to ensure that heavier items do not become airborne within the cabin. This is especially important when the aircraft is experiencing turbulence. Q. Why do you feel so tired from flying? A. As the aircraft altitude increases, air pressure decreases. As the pressure of the air decreases, the body absorbs less oxygen than it would at sea level – therefore, it must work harder to supply oxygen to the body’s cells. As the body is working harder, it becomes more tired. Q. Why do you sometimes feel pain in your ears or sinuses during ascent or descent? A. The sinuses and middle ear are air-containing cavities that connect with the nose via narrow channels. As aircraft ascend and cabin pressure drops, air passes out of these cavities (without any effort from the passenger) to balance the cabin pressure. It is a different matter during descent, as the cabin pressure increases. The channels close down and must be actively opened by holding the nose and
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blowing to inflate the cavities. Facial and ear pain can occur during descent if re-inflation does not occur, and this is much more likely if the passenger has nasal congestion. If you must fly with a cold or hayfever, use a decongestant nasal spray before descent and buy some ‘ear planes’ to plug your ears. (Information contributed by Dr Daniel Hains, ENT Surgeon.) Q. When can electronic equipment such as laptops, iPods and mobile phones be used? A. All Personal Electronic Devices (PEDs) must be placed in flight mode inside the departure terminal and must remain in flight mode until inside the arrival terminal. Small handheld PEDs weighing less than 1kg, such as mobile phones, can be used in flight mode during all stages of flight on Rex’s Saab 340 aircraft. PEDs over 1kg, such as laptop computers must be stowed appropriately for taxi, take-off and landing, and are permitted to be used only during cruise when the ‘Fasten Seatbelt’ sign is switched off. PEDs cannot be used while crossing the tarmac. Q. What is the average speed of the aircraft in cruise? A. Approximately 500 kilometres per hour. Q. Why do you have to get permission from the Captain to move to a vacant seat? A. The aircraft’s take-off speed is calculated by the weight and balance of the aircraft, and many factors need to be considered for a successful take-off. Factors include the weight of passengers and where they are seated, the weight of cargo, freight and fuel, the distance available on the runway et cetera. For example, if there are 100 or more kilograms of freight in the cargo, the balance of the aircraft will be better maintained if passengers are seated in the forward rows. AIR TURBULENCE Q. Aircraft often experience air turbulence, but what causes it? A. Imagine the air around the aircraft is water in a stream. We can see how water is disturbed around rocks or when two streams converge. Turbulence in the air is similar: as the aircraft passes through cold air or in the vicinity of terrain that has disturbed the
airflow – often incorrectly referred to as ‘air pockets’ – the aircraft climbs and descends in the same way that a boat moves on water. Though turbulence can be uncomfortable, it poses no threat to the aircraft and is akin to driving on a rough or unsealed road. More severe turbulence can be associated with developing thunderstorms. The SAAB 340 has a sophisticated weather radar that pilots use to avoid these areas. Occasionally, a flight attendant will discontinue serving passengers in turbulent conditions; this is a precaution to ensure everyone’s safety. Q. Why should you keep your seatbelt fastened even when the ‘Fasten Seatbelt’ sign is switched off? A. On occasions, the flight crew cannot foresee turbulence or it is not picked up on the flight-deck radar. Because of this, we could unexpectedly experience turbulence at any time. The company recommends that you always keep your seatbelt fastened while you are seated – for your safety, just in case unexpected turbulence is encountered. ENGINE NOISES Q. Why do the aircraft’s engine noises change during flight? A. Aircraft need more power to climb than to descend, in the same way that a car needs more power to go up a hill than down one. The SAAB 340 turboprop has more than enough power to climb, so shortly after take-off you will notice a change in noises as the power is reduced. The pilots also control the pitch angle of the propellers for various stages of the flight and as they ‘change gears’, this can also be heard in the cabin. Q. What should you do if you see or hear something that does not look or sound right or normal? A. Please advise your flight attendant. The flight attendant may be able to answer your query and allay any fears. If not, the flight attendant will contact the flight deck and advise the pilots of anything unusual. Rex encourages open communication and will always treat a passenger’s concerns with the utmost seriousness.