|Quoting EMBQA (Reply 1):|
Every smoke detector I've ever seen or worked has been hard wired.
|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.
|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!
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