SEATBELT SIGNS ON PLANES CAN BE BAD FOR YOU: EXPERT

An airline safety expert says plane crews may be unwittingly compromising flight safety by leaving seatbelt signs on too long.

Greg Marshall suggests passengers may not see the need to remain buckled up if the signs remain illuminated during a smooth ride or if no one has explained to flyers what’s going on.

“The seatbelt sign can tend to stay on for long periods of time. There are occasions when I believe the crews simply forget to turn the sign off,” said Marshall of Flight Safety Foundation, an aviation safety advocacy group headquartered in Alexandria, Va. “The intent of putting the seatbelt sign on degrades because passengers get up and walk around the cabin anyway.”

Canada’s Transportation Safety Board noted in a recent report on 21 turbulence related injuries on an Air Canada flight from Shanghai to Toronto in December 2015 that passenger compliance with the seatbelt signs may have been affected by the amount of time seatbelt lights had been on.

It said 35 minutes elapsed from the time turbulence preparations started in the cabin to when severe bumpiness began. The cabin lights were low and flight attendants had been moving about, suggesting to passengers that the turbulence was not imminent, the report said.

Canadian aviation regulations require passengers to buckle up during taxis, takeoffs and landings. They must also secure themselves if the seatbelt sign is on or when crew members tell them to do so.

Passengers are also advised, however, to keep their seatbelts fastened whenever they’re seated to avoid possible injuries from turbulence.

The industry is aware of the potential for overuse of seatbelt signs.

Transport Canada stated in a 2014 circular that the policies of some airlines to keep passengers in their seats at all times can be counter-productive. It said seatbelt signs should only be lit during critical phases of flight, in cases of turbulence or when the pilot deems it necessary for safety reasons.

“By doing so, passengers and crew members are more likely to understand and realize the importance of the safety belt sign and comply with the instructions when it is illuminated,” the circular stated.

The International Air Transport Association advises that seatbelt signs should be used only when necessary “to avoid undermining the importance of the illuminated signs during turbulence or emergency situation.”

The TSB report on the Air Canada flight noted that Transport Canada recommends seatbelt announcements be customized with the anticipated severity and duration of turbulence.