Dimming cabin lights for daylight take off and landings?
Question. Flew with Virgin Australia for the first time for many years. Excellent service and flight. I was curious to know why the FA made a PA saying she was going to dim the cabin overhead lights for take off when it was lunchtime on a bright sunny day. She added we could switch on the overhead reading lights. At the destination as the engines were shut down she switched on the overhead lights again.
I thought this dimming lights stuff was a night thing so passengers would have their eyes night-adapted to a crash involving evacuation. What's the point in daylight? Also why do the FA say "We DO thank you for flying VA - or we DO wish you a pleasant journey" Why not simply say "Thank you for flying etc" "DO" is superfluous. Signed: Silly old bugger...
Its to do with the emergency procedures for the airline and emergency lighting requrements in CAO 20.11
When an aircraft is in flight and less than 1,000 feet above terrain, emergency lighting system shall be switched on, or normal cabin lights shall be on and the emergency lighting system armed in the Flight Deck. Armed means the lights will automatically function when aircraft power is lost.
As the cabin lights are on but dimmed the emergeny lighting in the cabin is armed, rather than the cabin lights being off and possibly alarming a nervous passenger with all the emergency lighting on.
I have only finished my first week of groundschool for a passenger jet so I may be wrong, but that would be my guess.
Illumination of emergencyexits
9.1 Where an aircraft, which is equipped with an emergency lighting system in compliance with airworthiness directive Part 39-105 AD/General/4, is in flight and less than 1 000 feet above the terrain or on the ground with passengers on board, then either: (a) the emergency lighting system shall be switched on; or (b) the normal cabin lights shall be switched on and the emergency lighting system shall be armed.
Aeromuz, I have re-read your post, and you should do just fine at ground school. I misunderstood you first time around, It doesn't change my post however.
Fathom, I think you need to re-read what he said as well.
Having said that, although you are correct, it has nothing to do with why the lights are bright or dim? They need to be in one of the "ON" positions, that's all is says. It's very dark inside a long aluminum tube, I cannot recall flying around with the lights "OF"
More important than alarming the pax with EMG lights being on, is the time taken to recharge the battery packs. The common advice I've received from engineering is, aproximately 1 hours flight time/minute that the EMG lights are on, is required to recharge the EMG lit battery packs.