B757Forever wrote:It indicated the gear is in-transit.
dunc12 wrote:It actually indicates that the gear doors are unsafe and potentially moving. This lets ground crew know to vacate the gear bays in a hurry. The 757 has a similar feature, with its own test switch. The 767 lacks this feature, though the gear door retraction method on the ground is quite different compared to the 757/777.
edit: Referred to in the manual as "MAIN (or nose) GEAR DOOR UNSAFE" light
wjcandee wrote:I don't know if there's another reason, but typically red light in a lit area doesn't force your eyes to adjust when you look into darkness. Makes sense to light the gear wells with it at night. I notice that the Cathay 777 passenger aircraft that departs late in the video has the same red lighting, as does the Qatar 777 that follows it. The Kalitta 777 freighter that takes off right after FedEx also has the same lighting; it is just not as obvious because the Kalitta crew leaves the landing lights on longer than the FedEx crew does here, so the red lighting isn't as apparent.
wjcandee wrote:Those are bright red lights, so I guess the ground crew can't miss them if they come on when the aircraft is on the ground. I guess the message is "RUN!" Presumably, the birds don't care.
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