Article

2019-03-22 -Short Attention Span Theater-

An experienced pilot's perspective on Boeing's MCAS system problem

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Posted by gorb 2019-03-22 01:43|| || Front Page|| [7 views ] Top

#1 Excellent video, very detailed.

Posted by Tyranysaurus Clavith3514 2019-03-22 02:18|| 2019-03-22 02:18|| Front Page Top

#2 Very comprehensive.

Posted by Besoeker 2019-03-22 05:13|| 2019-03-22 05:13|| Front Page Top

#3 Click "here's the link" I get:

Not Found

The requested URL /"https://youtu.be/9Ts_AjU89Qk" was not found on this server.

Apache/2.4.10 (Debian) Server at rantburg.com Port 80

Posted by Herb McCoy 2019-03-22 06:23|| 2019-03-22 06:23|| Front Page Top

#4 fixed

Posted by Frank G 2019-03-22 06:26|| 2019-03-22 06:26|| Front Page Top

#5 Remember the movie Apollo 13, where the engineers keep throwing different emergency scenarios at the astronauts in the simulator? The result of which was they were calm in emergencies. Pilots nowadays don't want to be bothered with all that extraneous stuff.

Posted by Bobby 2019-03-22 09:27|| 2019-03-22 09:27|| Front Page Top

#6 Juan Browne / blancolirio is a great Youtube channel. He did extensive coverage of the Oroville Dam emergency and repair and also the Northern California fires. He flies his "mighty Luscombe" taildragger (which he restored) and rides his motorcycles over the mountain trails in the western US. Citizen journalism at its finest! I've been subscribed to his channel for a few years. It was interesting to hear his full background.

Posted by KBK 2019-03-22 13:38|| 2019-03-22 13:38|| Front Page Top

#7 #5, I think you are remembering Apollo 12, which got hit by lightning, twice, during ascent from launch. Its a pretty famous Engineering event: "SCE to aux" - Engineer John Aaron in mission control and Astronaut Alan Bean saved the second mission to the moon from disaster due to simulation and training a year earlier...

At 52 seconds, as the rocket traveled at over 1,600 feet per second, another bolt shook the craft. The "8-ball" attitude indicator spun wildly and the lights on the instrument panel stopped flashing and went dead.... The astronauts approaching space and the engineers on Earth now had ninety seconds to decide whether to abort. John Aaron, a 24-year-old NASA engineer who hailed from Oklahoma made the call...

The loss of all three fuel cells put the CSM entirely on batteries, which were unable to maintain normal 75-ampere launch loads on the 28-volt DC bus. One of the AC inverters dropped offline. These power supply problems lit nearly every warning light on the control panel and caused much of the instrumentation to malfunction.

Electrical, Environmental and Consumables Manager (EECOM) John Aaron remembered the telemetry failure pattern from an earlier test when a power supply malfunctioned in the CSM Signal Conditioning Equipment (SCE), which converted raw signals from instrumentation to standard voltages for the spacecraft instrument displays and telemetry encoders.[3]

Aaron made a call, "Try SCE to aux," which switched the SCE to a backup power supply. The switch was fairly obscure, and neither Flight Director Gerald Griffin, CAPCOM Gerald Carr, nor Mission Commander Pete Conrad immediately recognized it. Lunar Module Pilot Alan Bean, flying in the right seat as the spacecraft systems engineer, remembered the SCE switch from a training incident a year earlier when the same failure had been simulated. Aaron's quick thinking and Bean's memory saved what could have been an aborted mission, and earned Aaron the reputation of a "steely-eyed missile man".[4] Bean put the fuel cells back on line, and with telemetry restored, the launch continued successfully. Once in Earth parking orbit, the crew carefully checked out their spacecraft before re-igniting the S-IVB third stage for trans-lunar injection. The lightning strikes had caused no serious permanent damage.

This was way back in the day when this nation still admired "steely-eyed missile men"

Full article

(https://motherboard.vice.com/en_us/article/xyw4kz/john-aaron-apollo-12-curiosity-luck-and-sce-to-aux)

Posted by Injun Bucket8891 2019-03-22 18:58|| 2019-03-22 18:58|| Front Page Top

#8 Video of the Apollo 12 SCE to AUX here

Posted by Injun Bucket8891 2019-03-22 19:13|| 2019-03-22 19:13|| Front Page Top

#9 https://www.youtube.com/watch?v=eWQIryll8y8

In case the embedded link doesnt work. Its a decent 4 minutes worth a watch

Posted by Injun Bucket8891 2019-03-22 19:14|| 2019-03-22 19:14|| Front Page Top

#10 IB - awesome stuff, thx

Posted by Frank G 2019-03-22 20:26|| 2019-03-22 20:26|| Front Page Top

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