Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Strategies & Market Trends : 2026 TeoTwawKi ... 2032 Darkest Interregnum -- Ignore unavailable to you. Want to Upgrade?

To: TobagoJack who wrote (147123)	3/18/2019 3:28:38 AM
From: Elroy Jetson	3 Recommendations Recommended By Cogito Ergo Sum elmatador Joseph Silent Read Replies (1) \| Respond to of 217680

You could scare yourself with the case of Qantas Flight 72 Singapore to Perth in Oct 2008. - en.wikipedia.org The aircraft was a fly-by-wire Airbus 330-303. The aircraft discontinued auto-pilot due to a claimed fault in Flight-Control Unit 1. The captain, a former US airforce fighter jet pilot took control, and asked the co-pilot to switch the Flight Computer two, which then failed indicating the plane was: a.) flying too fast b.) in a stall - two mutually incompatible problems which couldn't both exist. Even though the plane was in "manual control" the plane made a steep dive leaving passengers on the ceiling with broken bones. The pilot used the joystick control too pull the plane up sharply, but nothing happened. After letting go of the joystick and trying again to pull the nose up several times, the aircraft finally responded. A few minutes later the plane made another sickening dive which didn't respond to the captains joystick input. To relieve the tension the pilot told his crew a line from the "Airplane" film, "I obviously picked the wrong day to stop sniffing glue." They declare an emergency and will land at Learmonth military airport, the first airport in Australia. To avoid crashing if the aircraft did another unexpected dive, the pilot used a high-speed landing maneuver with sharp turns to land while having enough speed to recover from a potential third dive. Later analysis shows the two redundant ADIRU units sent, suddenly began sending altitude readings as Angle of Attack readings and AOA readings as altitude. The flight computer "falsely knew the aircraft was in a stall" so like the Boeing 737-max, the aircraft over-rode the Captain's joystick input and placed the plane in a dive to escape the non-existent stall. - en.wikipedia.org The ADIRUs were tested in many harsh conditions and no fault was ever found. This is disturbing because the A-330 ADIRUs have sent erroneous data on a subsequent Qantas flight 71 and an AirItalia flight. Since the fault has never been located Airbus rewrote the flight computer to consider the possibility that AOA and altitude data are suddenly switched. That's a "fix" but without knowing the cause of the problem this can happen again with swapped data the flight computer is not designed to consider - and again the pilot will not be able to over-ride the flight path using his joystick. A330s are still flying with an unknown fault since 2008 that still has not been fixed creating steep dives which can't be over-ridden by the pilot. In a Boeing you simply turn off the automated flight equipment. In an Airbus that's impossible. If this flight had not been flown by an experienced combat pilot the results could have been very different, and even with that, they didn't die because they were lucky. This is our world. Not so disastrous when an "unfindable fault" in the computer and sensing systems are controlling a subway in Hing Kong - but in an A-330 eventually it will kill everyone on biard.