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Lavatory Smoke Detectors - Battery Vs Hardwired  
User currently online1337Delta764 From United States of America, joined Oct 2005, 6439 posts, RR: 2
Posted (1 year 2 weeks 3 days 9 hours ago) and read 5685 times:

It seems that most older aircraft have battery-powered smoke detectors in the lavatories, while most newer aircraft have hardwired ones. I presume this change was made to prevent tampering by removing the battery.

Does anyone know about when did hardwired smoke detectors in lavatories become standard? I know that in most U.S. homes, hardwired smoke detectors became standard in the early 1990s, however, most residential hardwired smoke detectors have battery backup. I don't think the smoke detectors on most newer aircraft have a battery at all.

[Edited 2013-07-10 14:09:50]


The Pink Delta 767-400ER - The most beautiful aircraft in the sky
4 replies: All unread, jump to last
 
User currently offlineEMBQA From United States of America, joined Oct 2003, 9364 posts, RR: 11
Reply 1, posted (1 year 2 weeks 3 days 8 hours ago) and read 5645 times:

Every smoke detector I've ever seen or worked has been hard wired.


"It's not the size of the dog in the fight, but the size of the fight in the dog"
User currently online1337Delta764 From United States of America, joined Oct 2005, 6439 posts, RR: 2
Reply 2, posted (1 year 2 weeks 3 days 8 hours ago) and read 5640 times:

Quoting EMBQA (Reply 1):

Every smoke detector I've ever seen or worked has been hard wired.

The smoke detectors I have seen on DL's older aircraft (primarily MD-88s and older 752s) look like ordinary household battery-powered smoke detectors, since they do not have a solid green or red light on them (only a red light that flashes every 40-50 seconds). DL's newer Boeings have a hardwired rectangular smoke detector that is integrated into the ceiling.



The Pink Delta 767-400ER - The most beautiful aircraft in the sky
User currently offlinecelestar345 From Hong Kong, joined May 2013, 19 posts, RR: 0
Reply 3, posted (1 year 2 weeks 2 days ago) and read 5453 times:

Quoting 1337Delta764 (Reply 2):
The smoke detectors I have seen on DL's older aircraft (primarily MD-88s and older 752s) look like ordinary household battery-powered smoke detectors, since they do not have a solid green or red light on them (only a red light that flashes every 40-50 seconds). DL's newer Boeings have a hardwired rectangular smoke detector that is integrated into the ceiling.

Not only old DL, but on some DL 763s the smoke detectors are what looks like household smoke detectors, and sometimes the routine tasks requires changing the batteries!


User currently online1337Delta764 From United States of America, joined Oct 2005, 6439 posts, RR: 2
Reply 4, posted (1 year 2 weeks 1 day 16 hours ago) and read 5399 times:

Quoting celestar345 (Reply 3):
Not only old DL, but on some DL 763s the smoke detectors are what looks like household smoke detectors, and sometimes the routine tasks requires changing the batteries!

I believe the domestic 763s and unmodified 763ERs have battery powered units, however, the modded 763ERs (which got brand new lavatories) I think might have hardwired units.



The Pink Delta 767-400ER - The most beautiful aircraft in the sky
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