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Pilot Who Hitched a Ride Saved Lion Air 737 on the Day Before Deadly Crash | Hacker News
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averros 1 hour ago [-]

Actual instrument-rated pilot here.

What people (including pilots) do under stress is resort to simple actions drilled in by training. That's why emergency procedure training is a major part of pilot training curriculum.

What goes away first under stress is capability for complex reasoning, which is what one would need to figure out what the heck is going on and take appropriate action. In this case an a/c doing uncommanded dive can be a result of three things: elevator controls malfuncion (unlikely in modern jets, the mechanisms for transmitting control forces from the yoke to the elevator are multiply redundant and well-understood to be critical), structural breakdown (empennage falling off would do that), or run-away elevator or stabilizer trim.

In most a/c the runaway trim can be only caused by malfunctioning auto-pilot (that's why APs have multiple redundant ways to disable them), so the pilots faced this situation react by trying to disable AP in all available ways and then immediately jumping to conclusion that there's something catastrophically wrong with elevator system or even airframe integrity. The thought that there could be yet another system which can do major trim adjustment doesn't even enter their consciousness.

Training (and/or being in a position where there's no immediate stress of wrangling misbehaving a/c) would help to get to the correct solution (disabling trim motor by pulling the circuit breaker).

That said, flying an a/c seriously out of trim is hard, and can cause an accident on its own (the fine pitch control is gone, and you can even be so far out of trim that you cannot do landing flare no matter how hard you pull up, which in heavy jets would result in structural breakdown when the plane slams into runway). "
stress  thinking-under-stress  bandwidth  cognitive-load  automatic-decision-making  training  experts  **  HN-comments  pilots 
10 hours ago by MarcK
[1812.00417] Snorkel DryBell: A Case Study in Deploying Weak Supervision at Industrial Scale
Automating labeling of training data for machine learning, using Snorkel Drybell, an addon to Snorkel, an open source data labeling and management system
training  data  automated  labeling  snorkel  drybell  algorithm  research  google  deep  machine  learning 
yesterday by asteroza
Azure Apps: Diagnostics, Instrumentation, and Logging
Released 3/12/2019
Azure is a complex ecosystem. Diagnosing issues can be difficult with so many services and systems—but it's critical to get right. This course takes an Azure-centric approach to diagnosing, instrumentation, and logging with Azure applications. Instructor Sahil Malik explains how to use Application Insights to track and record exceptions; perform diagnostic logging; and view health, activity, and usage metrics in Azure Monitor. He also shows how to use Azure Monitor to track virtual machines and containers, monitor network conditions, and scale services automatically based on predefined rules. Plus, learn how to optimize your deployments with Azure Advisor security and performance recommendations. With these tools and tips, you can gain deeper insights into resources you have provisioned both on-premises and in the Azure cloud.
azure  training 
2 days ago by andyhuey

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