Posts about: "RAT (All)" [Posts: 683 Pages: 35]

Nonsense. Please don\x92t post things as fact that are just speculation.

Although the CCTV video is of unfortunately low resolution the trailing edge discontinuity between flaps and aileron can just about be seen on the port wing at about 3/4 span, just as it can in this video at around 54 seconds in:


Looking at the original video again the equivalent discontinuity is just about perceivable on both wings, so I was wrong at first and the flaps were not retracted. What appears to be the RAT quite possibly is; at that angle the nosewheel is completely hidden by the fuselage.

Are you telling me that with all the evidence confirming that the RAT is out, that the RAT is not out?

The entire flight from rotation to impact was 30 seconds. Is it even possible to complete an engine shutdown in that time?

It looks like an action slip to me as the timing looks right ie \x93positive rate \x93 \x93gear up\x94 (someone raises the flaps instead of the gear) PF is looking through the HUD so just sees someone move their hand rather than the hand moving the correct lever

It\x92s then taking off heavy weight with 35c and the flaps have been raised and the gear is still down.

As nobody realised the flaps had been raised instead of the gear when it happened they automatically think it\x92s some other issue as the aircraft loses lift and the amber band rapidly rises and the aircraft runs out of lift.

could be something else like fuel or 2 engine failure but seems possible it\x92s an action slip also.

I didn\x92t see the RAT deployed but saw the gear down still and an aircraft fall out of the sky with what sounded like engines running still.

aviationweek.com/aerospace/aircraft-propulsion/faa-boeing-787s-need-be-powered-every-120-days

aviation.stackexchange.com/questions/14494/in-what-circumstances-could-a-787-stay-powered-on-continuously-for-248-days

Loud bang heard by pax 11A suggests otherwise. (ie EFATO) but still\x85

Could It have been a compressor stall / flow reversal at the point of EEC shutdown? Loss of thrust on both engines?

The odds are slim but would the RAT deploy in such a scenario?

(or has the RAT deployment observation been debunked?)

But why is the RAT extended? Any 787 drivers able to confirm under what conditions the RAT automatically deploys?

Who said it is deployed? I don't see it deployed. How would it even have time to deploy, it crashed within 30 seconds!

This is a higher quality video posted earlier. That is not two engines at TOGA and sounds incredibly like a RAT. I think most commenting about not hearing a RAT are watching the more widely shared low quality vid with very poor sound.

The RAT appears out. Little asymmetry at any point. It has the ingredients of dual engine loss, whether from bids, electronic or human error reasons we will soon find out.

Need the full quality one mate. Also I believe at that angle the RAT is in line with the gear

Doubt it, let's see. Hope the info is released asap, they should have all the data very soon

note: engines seem awfully quiet. RAT clearly audible

i think that\x92s quite conclusive.

I have heard 777s and 787s pass overhead with the RAT deployed many hundreds of times. The sound in that video is 100% a deployed RAT.

RAT theory plausible IMHO

Deep breath... I wasn't convinced before, I am now. The RAT is definitely out guys. We are now potentially looking at a problem with the aircraft. Possibly a big one!

something I\x92m not sure has been discussed till now- doesn\x92t the 787 have an \x91early door\x92 function where the gear doors automatically open to improve performance? Even pprune has discussed this:
B787-9 LDG gear retraction
(That thread is illuminating in light of this loss for a number of reasons too)


in the video/images seen it doesn\x92t appear that the gear doors are down, does this further indicate an AC power loss?

(not sure if this applies to the entire 787 family though)

Given the sound which clearly mimics the RAT, images and collective tech knowledge, what could lead to this symmetric loss of thrust/lift at 200ft?

Fuel supply/quality issues?

Ok, so...

Some have said the RAT appears to have been deployed. This would suggest a hydraulic/electrical failure on the plane.

A hydraulic/electrical failure could well make it impossible to retract the gear immediately.

But, what do flaps do in the event of a major hydraulic/electrical failure? Is there a default that they revert back to?

We can, I think, rule out engine failure, at least single engine failure because the rudder is still straight on in the
Video. You can also hear the engines..