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Cabin Lighting At Take-off And Landing At Night  
User currently offlineGoodday From Japan, joined May 2005, 55 posts, RR: 0
Posted (7 years 10 months 1 week 4 days 8 hours ago) and read 15290 times:

safety wise, which is correct, cabin lights on or cabin lights off?

27 replies: All unread, showing first 25:
 
User currently offlineAloha73G From United States of America, joined Jul 2003, 2365 posts, RR: 4
Reply 1, posted (7 years 10 months 1 week 4 days 8 hours ago) and read 15266 times:

At HA, they are supposed to off/dim, so that people's eyesight is adjusted to the conditions outside. I think other airlines are the same.

-Aloha!



Aloha Airlines - The Spirit Moves Us. Gone but NEVER Forgotten. Aloha, A Hui Hou!
User currently offlineSuske From Belgium, joined May 2006, 8 posts, RR: 0
Reply 2, posted (7 years 10 months 1 week 4 days 8 hours ago) and read 15247 times:

Could it be that during take-off and landing the engines generate less bleed air and therefore the less important energy consumers (eg cabin lighting) have to do with less?


Houdt U van vliegen? Dan zal ik er paar vangen voor U
User currently offlineThepilot From Canada, joined Jan 2010, 5 posts, RR: 0
Reply 3, posted (7 years 10 months 1 week 4 days 8 hours ago) and read 15255 times:

I have landed many, many times with the lights dimmed. The strobes/nav lights combined with heavy cabin lights make for ocular stress. Whenever I fly, given in a 172, we need 30 minutes to adjust our rods (night vision sensors) in our eyes. This is for civil PIC, of course, but I would think the FARs 121 or 135 would NOT say "cabin light must be on for landing."


From YVR
User currently offlinePilotpip From United States of America, joined Sep 2003, 3150 posts, RR: 11
Reply 4, posted (7 years 10 months 1 week 4 days 7 hours ago) and read 15172 times:

Quoting Suske (Reply 2):
Could it be that during take-off and landing the engines generate less bleed air and therefore the less important energy consumers (eg cabin lighting) have to do with less?

Bleed air has nothing to do with electrical power. Generators are connected to the engine directly via constant speed drives which keep them turning at the proper speed to deliver the correct 115 volts at 400 cycles.



DMI
User currently offlineFutureSDPDcop From United States of America, joined Feb 2006, 1293 posts, RR: 5
Reply 5, posted (7 years 10 months 1 week 4 days 7 hours ago) and read 15109 times:

Quoting Aloha73G (Reply 1):
At HA, they are supposed to off/dim, so that people's eyesight is adjusted to the conditions outside. I think other airlines are the same.

That is correct. I learned that on here. There's been a few threads on it.


User currently offlineWrighbrothers From United Kingdom, joined Jul 2005, 1875 posts, RR: 9
Reply 6, posted (7 years 10 months 1 week 3 days 21 hours ago) and read 14863 times:

The lights are supposed to be dim, as so you can see, however, they must be dim so that in the event of an emergancy, your eyes can adjust quicker to the outside darkness and to reduce the chance or being 'light blind', try entering a pitch black room from a normal light room and you'll be unable to see anything for a while, this is reason they dim the lights, to reduce the time this happpens.

wrighbrothers



Always stand up for what is right, even if it means standing alone..
User currently offlineMats From United States of America, joined Jul 2003, 633 posts, RR: 1
Reply 7, posted (7 years 10 months 1 week 3 days 21 hours ago) and read 14822 times:

Or as a few more sarcastic flight attendants say, "We will be dimming the lights to enhance the appearance of our cabin crew."

User currently offlineMarkHKG From United States of America, joined Dec 2005, 960 posts, RR: 2
Reply 8, posted (7 years 10 months 1 week 3 days 20 hours ago) and read 14754 times:

Okay...so how bright exactly are the cabin emergency lights when they turn on?

In my experience the cabin emergency lights are bright enough to negate any of the "pre-dimmed" vision. Although dimming the lights do allow for a better view out the window to assess outside conditions (fire, etc.)



Release your seat-belts and get out! Leave everything!
User currently offlineLXA340 From Switzerland, joined Nov 2006, 2127 posts, RR: 3
Reply 9, posted (7 years 10 months 1 week 3 days 20 hours ago) and read 14739 times:

On many day flights all the Cabin lights are on no matter if it is for takeoff or landing which is another indicator that switching them off or on has nothing to do with saving energy. Nevertheless every airline has different regulations regarding to dim or switch all lights off during take off and landing during the night. Also it depends on the cabin crew on most of the airlines I have flowin with the procedure is always different once dimmed and once completely off and vice versa

User currently offlineGoodday From Japan, joined May 2005, 55 posts, RR: 0
Reply 10, posted (7 years 10 months 1 week 3 days 12 hours ago) and read 14516 times:

Does Australian Aviation Authority have a regulation to put cabin lights on during take-off and landing in the night?

User currently offlineCarpethead From Japan, joined Aug 2004, 2971 posts, RR: 3
Reply 11, posted (7 years 10 months 1 week 3 days 6 hours ago) and read 14346 times:

Quoting Goodday (Thread starter):

You are probably asking because on a recent flight in Japan, the lights were not dimmed? For anywhere in the world that I have experienced, all night take-offs and landings the cabin lights were turned off (not dimmed). The FA always announce to the pax for readers to turn on the overhead lights.
For flights in Japan about one in 20 flights the lights are turned off. Why not all or none, I have no clue.


User currently offlineCrownvic From United States of America, joined Oct 2004, 1934 posts, RR: 5
Reply 12, posted (7 years 10 months 1 week 3 days 5 hours ago) and read 14279 times:

There is nothing more annoying than having a window seat during night flying and the crew leaving the the cabin lights on full blast on landing and take off. I have noticed this becoming more and more common with flying in the past two years.

User currently offlineVHXLR8 From Australia, joined Feb 2005, 500 posts, RR: 3
Reply 13, posted (7 years 10 months 1 week 3 days 5 hours ago) and read 14274 times:

Quoting Goodday (Reply 10):
Does Australian Aviation Authority have a regulation to put cabin lights on during take-off and landing in the night?

No, there is no such regulation in Australia. In fact, QF always dims the cabin lights for takeoff and landing. Not sure about DJ.


User currently offlineChrisrad From Australia, joined Dec 2000, 1071 posts, RR: 8
Reply 14, posted (7 years 10 months 1 week 3 days 5 hours ago) and read 14272 times:

I know MH switch off the lights completely for takeoff and landing. I think that is the best way fro your eyes to adjust to the night time.


Welcome aboard Malaysia Airlines! Winner of Best Cabin Staff 2001,2002,2003,2004,2007,2009,2012
User currently offlineXv408 From United Kingdom, joined Nov 2006, 52 posts, RR: 0
Reply 15, posted (7 years 10 months 1 week 2 days 22 hours ago) and read 14203 times:

Just doing a quick Google search, it seems that dimming the lights is a recommendation, not a regulation (see CHIRP bulletin and NBAA links below)
http://www.chirp.co.uk/main/downloads/docs/CCFB15.doc
http://web.nbaa.org/public/ops/safet...dOperatingProcedures-FixedWing.doc

There is some hint that it used to be a regulation in the early days of passenger-carrying flight, when there was just a curtain (if that) between the crew and the passenger cabin.


User currently offlineIAirAllie From , joined Dec 1969, posts, RR:
Reply 16, posted (7 years 10 months 1 week 2 days 14 hours ago) and read 14131 times:

It's supposed to aproximate outside conditions. My airline says sidewall lights off overhead dim. With the assumption that ambient light comming throught the windows will equalize the interior exterior lighting.

User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 17, posted (7 years 10 months 1 week 2 days 1 hour ago) and read 14050 times:

Not all lights off.But Def Dimmed to allow the Eye to adjust to cater to any visable Fire.
regds
MEL



Think of the brighter side!
User currently offlineMr.BA From Singapore, joined Sep 2000, 3423 posts, RR: 22
Reply 18, posted (7 years 10 months 4 days 7 hours ago) and read 13878 times:

Quoting VHXLR8 (Reply 13):



Quoting VHXLR8 (Reply 13):
In fact, QF always dims the cabin lights for takeoff and landing.

Actually I flew QF quite a few times and they didn't dim the lights at all, not even a bit. Evident when you see them land from the outside.



Boeing747 万岁!
User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 19, posted (7 years 10 months 3 days 1 hour ago) and read 13799 times:

Quoting Mr.BA (Reply 18):
Actually I flew QF quite a few times and they didn't dim the lights at all, not even a bit. Evident when you see them land from the outside

Is that an SOP or just error.
regds
MEL



Think of the brighter side!
User currently offlineNonfirm From United States of America, joined Sep 2005, 434 posts, RR: 0
Reply 20, posted (7 years 10 months 3 days ago) and read 13789 times:

I was reading our f/a's manual and in the section covering the announcements section it talks about shutting the cabin lights off and were to locate your reading light.So i would assume they are off for the duration of the flight but the need to be on while on the ground to charge the floor light strips.  airplane 

User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 21, posted (7 years 10 months 2 days 7 hours ago) and read 13695 times:

Quoting Nonfirm (Reply 20):
So i would assume they are off for the duration of the flight but the need to be on while on the ground to charge the floor light strips

The Emergency path lights along with the Door Exit Lights are charged from Aircraft power supply to Ni-Cad battery packs.
regds
MEL



Think of the brighter side!
User currently offlineNonfirm From United States of America, joined Sep 2005, 434 posts, RR: 0
Reply 22, posted (7 years 10 months 1 day 23 hours ago) and read 13671 times:

Quoting HAWK21M (Reply 21):
The Emergency path lights along with the Door Exit Lights are charged from Aircraft power supply to Ni-Cad battery packs.
regds
MEL

Mel our floor path emergency strips are not battery powered the are photoluminescent and require all of the cabin light to be on full bright for charging.All the rest of the light operate off of battery packs but not the floor.We removed all of the battery powered floor strips due to the fact we had to many write-up associated with the system light burned out and wires pulled due to pax luggage and the MEL only allowed a certain amount of light to be inop.As a result of the new system we have no more write up's for the floor lights.
  
http://safety.sv.net/pdf/ccs_jan-feb04.pdf

[Edited 2006-12-27 11:50:16]

User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 23, posted (7 years 10 months 1 day 15 hours ago) and read 13643 times:

Quoting Nonfirm (Reply 22):
floor path emergency strips are not battery powered the are photoluminescent

Very good link.
Thanks for Sharing.
Hows the reliability like practically.
regds
MEL



Think of the brighter side!
User currently offlineNonfirm From United States of America, joined Sep 2005, 434 posts, RR: 0
Reply 24, posted (7 years 10 months 1 day 11 hours ago) and read 13619 times:

Quoting HAWK21M (Reply 23):
Hows the reliability like practically.

We perform a periodic check for how the intensity of the strip is holding up.They are very easy to change.really the only compliant is some parts of the strips get dirty but the are to be cleaned every night be fleet service.
 airplane 


25 Mr.BA : My take on it would be SOP. Some of the members here experienced dimming of cabin lights but as far as it goes for me I haven't seen them doing so. W
26 HAWK21M : If its SOP.Whats their reasoning. regds MEL
27 Mr.BA : I have no idea. During conversations with the flight crew I'll always forget to ask them about this. Maybe in future!
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