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Originally Posted by AllYourBaseAreB
(Post 3680996)
The NTSB report is short. Just read it. From my casual look, it seems like a hand flying captain became distracted in the clouds/bumps to look at the EICAS and/or trouble shoot after a botched cleanup after T/O. I don’t know 777 procedures. Lots of possible contributing factors on how/why that could have happened but no CVR and conflicting pilot accounts.
my big wonder was why level off in an overspeed? FO notices the unusual flight path but is confused by the oddness of it & doesn’t immediately diagnose the problem correctly. (Assumes his instruments could be reading erroneously, or that the CA could be responding to something he isn’t seeing.) They’re IMC so disorientation exacerbates the problem. Ideally the FO would verbalize what he’s seeing immediately, but his response is not shocking considering what we know about stress & human factors. Basically, distraction leads to loss of SA. The unexpected disruption while in IMC leads to confusion & a delay in clear communications. Scary stuff, but it’s a scary thing that could happen to any of us. Big takeaways for me are: 1. Don’t multitask in low altitude IMC. It only takes a couple seconds away from your instruments to lose orientation in the soup- even for the most experienced of us. Most things that might be grabbing your attention (like a flap overspeed) are far easier to deal with after the fact than is a CFIT. 2. Don’t assume the other guy knows what he’s doing. If you see something non-standard, verbalize what you’re seeing & let the other guy explain to you why it’s happening. If that means you end up looking like the knucklehead who wasn’t paying attention, see my conclusion to #1. |
Originally Posted by sailingfun
(Post 3681016)
They were over 16 degrees nose down descending at about 150 feet per second at one point. The pullout was 2.66 G’s at the peak with flaps extended. The 777 is a tough airplane!
Thanks for the link! |
Originally Posted by Nordhavn
(Post 3680988)
Something just ain't adding up here. This thing reads as a total loss of situational awareness. Just after this happened people were speculating that the FO accidentally went to flaps up and they were in stall recovery mode but this just is very bizarre.
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Originally Posted by Nordhavn
(Post 3680988)
Something just ain't adding up here. This thing reads as a total loss of situational awareness. Just after this happened people were speculating that the FO accidentally went to flaps up and they were in stall recovery mode but this just is very bizarre.
if you weren’t there and don’t know what happened shut up, it doesn’t do anyone any good to spout off about **** you don’t know. |
Originally Posted by MasterOfPuppets
(Post 3681150)
if you weren’t there and don’t know what happened shut up, it doesn’t do anyone any good to spout off about **** you don’t know. |
Originally Posted by CRJCapitan
(Post 3681172)
Now that we have a good amount of information from an official report, I disagree. It’s important to talk about it as it’s something all pilots can learn from and can work to prevent from happening again.
spouting off before anyone knows anything is pointless |
yup yup, simple loss of instrument cross check/SA during hand flying, distraction-induced in this case, and complacency in attempting to troubleshoot instead of respecting how quickly IMC unusual attitudes can mort you. Occam's razor really. And yes, we're all human and capable of falling prey to it, some of us due to inexperience, some of us due to experience-induced complacency.
This is all I do (handfly and flight instruct/evaluate) for a living on the mil side (AETC), and can stand witness to how significantly eroding to hand flying, heavy aircraft flying and automation writ large, can be for otherwise experienced pilots. But instrument cross check atrophy is another one of those "we don't talk about fight club" among high experience crowd, to say nothing of 121 as a community. And before the herbivore white knight brigade comes @ me, this isn't unique to crew planes, most fighter fatalities in the last 20 years have been due to loss of control in recovery or launch, than weapons employment or enemy action. Everybody stay safe out there, and keep the lift vector where you intended to. |
Originally Posted by JackReacher
(Post 3681143)
I agree, something just doesn’t seem right. If you were concerned that the flaps were at a different position (higher degree ie 15 vs 5), why would you let the pitch drop to such an excessively nose low attitude??
What he did do to address the airspeed issue was to reduce the power. Obviously, without compensating with elevator pressure, this will cause the pitch angle to naturally come down. He also calls for flaps 5. Assuming he hasn’t made too drastic a power reduction, the aircraft would still be accelerating which, in IMC can create the sense of pitching up. Now you’ve got an airplane with a tendency toward pitching down & a distracted & stressed flying pilot who senses his aircraft is pitching up. It’s likely he would be applying forward yoke pressure while fixating on the flap lever without even knowing he was doing it. At any rate, changes in pitch, power, & airspeed in IMC will throw your vestibular system out of whack. Throw in a distraction that takes your eyes off the instruments & it isn’t surprising at all. To me the outcome fits the pilots’ accounts quite clearly. |
Originally Posted by hummingbear
(Post 3681217)
Read the captain’s narrative. He never says he intentionally lowered the nose. He says he was puzzled by the flap & speed indications & looked at the indicator & flap lever- then realized the aircraft was in a nose down attitude as he heard the GPWS. IOW, he was not conscious of the airplane’s attitude until it had become dangerous.
What he did do to address the airspeed issue was to reduce the power. Obviously, without compensating with elevator pressure, this will cause the pitch angle to naturally come down. He also calls for flaps 5. Assuming he hasn’t made too drastic a power reduction, the aircraft would still be accelerating which, in IMC can create the sense of pitching up. Now you’ve got an airplane with a tendency toward pitching down & a distracted & stressed flying pilot who senses his aircraft is pitching up. It’s likely he would be applying forward yoke pressure while fixating on the flap lever without even knowing he was doing it. At any rate, changes in pitch, power, & airspeed in IMC will throw your vestibular system out of whack. Throw in a distraction that takes your eyes off the instruments & it isn’t surprising at all. To me the outcome fits the pilots’ accounts quite clearly. Really well said though. |
Originally Posted by hummingbear
(Post 3681217)
Read the captain’s narrative. He never says he intentionally lowered the nose. He says he was puzzled by the flap & speed indications & looked at the indicator & flap lever- then realized the aircraft was in a nose down attitude as he heard the GPWS. IOW, he was not conscious of the airplane’s attitude until it had become dangerous.
What he did do to address the airspeed issue was to reduce the power. Obviously, without compensating with elevator pressure, this will cause the pitch angle to naturally come down. He also calls for flaps 5. Assuming he hasn’t made too drastic a power reduction, the aircraft would still be accelerating which, in IMC can create the sense of pitching up. Now you’ve got an airplane with a tendency toward pitching down & a distracted & stressed flying pilot who senses his aircraft is pitching up. It’s likely he would be applying forward yoke pressure while fixating on the flap lever without even knowing he was doing it. At any rate, changes in pitch, power, & airspeed in IMC will throw your vestibular system out of whack. Throw in a distraction that takes your eyes off the instruments & it isn’t surprising at all. To me the outcome fits the pilots’ accounts quite clearly. |
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