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Some people trust their own thinking to judge what they see. We know it called mayday and then lost communication. It also stopped transmitting GPS data. Look

Some people trust their own thinking to judge what they see. We know it called mayday and then lost communication. It also stopped transmitting GPS data. Looking at this it likely lost all electric power. The electric power comes from generators driven by the turbines. If you lose both turbines you lose electricity. You also lose the hydraulic system so you can not get in the gear or change flaps. Occam's razor checks out.

newdee 1y ago
Don’t these Dreamliners also have back batteries?
- VBprogrammer 1y ago
  Even on light GA aircraft the radio will run for an hour on the starter battery. This narrative doesn't sound realistic.
  - wkat4242 1y ago
    Yes and many pilots being walkie talkies in GA as backup. Not sure if airline pilots do this though. And its kinda hard to root around for it and fiddle with it while trying to keep an unpowered jetliner in the air. They're more for emergencies where the radio is the only problem. By the way, the age old rule is "Aviate, Navigate, Communicate" in that order of priority. So it could be they just had their hands full with the Aviate part.
- hanche 1y ago
  They have a RAT (ram air turbine) that deploys automatically under specific conditions. It’s basically a turbine providing electric and hydraulic power. It was almost certainly deployed on the accident flight. It will only power the most critical equipment, though. Possibly, that does not include the ADS-B transmitter (which broadcasts position and related data).
  - keepamovin 1y ago
    This analysis is convincing about being able to hear the sound of the RAT from the crash video: https://www.youtube.com/watch?v=SbDJjgN7Xbo https://www.youtube.com/watch?v=SbDJjgN7Xbo
- wkat4242 1y ago
  Yes, lithium ones, those were the ones that kept catching fire then the 787 was just out. I guess they're just for the time until the RAT kicks in. Or to augment it. Ps there's also the APU, a small turbine in the tail for generating electricity.

newdee 1y ago

Don’t these Dreamliners also have back batteries?

VBprogrammer 1y ago
Even on light GA aircraft the radio will run for an hour on the starter battery. This narrative doesn't sound realistic.
- wkat4242 1y ago
  Yes and many pilots being walkie talkies in GA as backup. Not sure if airline pilots do this though. And its kinda hard to root around for it and fiddle with it while trying to keep an unpowered jetliner in the air. They're more for emergencies where the radio is the only problem. By the way, the age old rule is "Aviate, Navigate, Communicate" in that order of priority. So it could be they just had their hands full with the Aviate part.
hanche 1y ago
They have a RAT (ram air turbine) that deploys automatically under specific conditions. It’s basically a turbine providing electric and hydraulic power. It was almost certainly deployed on the accident flight. It will only power the most critical equipment, though. Possibly, that does not include the ADS-B transmitter (which broadcasts position and related data).
- keepamovin 1y ago
  This analysis is convincing about being able to hear the sound of the RAT from the crash video: https://www.youtube.com/watch?v=SbDJjgN7Xbo https://www.youtube.com/watch?v=SbDJjgN7Xbo
wkat4242 1y ago
Yes, lithium ones, those were the ones that kept catching fire then the 787 was just out. I guess they're just for the time until the RAT kicks in. Or to augment it. Ps there's also the APU, a small turbine in the tail for generating electricity.