QF72
06-05-2019, 05:49 PM
#1
Gets Weekends Off
Thread Starter
Joined APC: Mar 2017
Posts: 128
QF72
https://youtu.be/0cS1SMptlnQ
I won't comment on this video because I lack the qualifications, but I'd like to hear the discussion of the experts.
Beware that there are things on it that have been discussed here (like the roll of the pilots in the 2 tragic 737 accidents) that, like anything in the media, seem to be tergiversed.
But those booboos aside, it seems to touch several human aspects of the whole aviation automation issue.
It lacks, however, the technical explanation of why it happened.
I won't comment on this video because I lack the qualifications, but I'd like to hear the discussion of the experts.
Beware that there are things on it that have been discussed here (like the roll of the pilots in the 2 tragic 737 accidents) that, like anything in the media, seem to be tergiversed.
But those booboos aside, it seems to touch several human aspects of the whole aviation automation issue.
It lacks, however, the technical explanation of why it happened.
06-05-2019, 07:06 PM
#2
Disinterested Third Party
Joined APC: Jun 2012
Posts: 6,021
It's a very dramatic video and the girl has very blue eyes.
It lacks facts, you said. The fact is that an uncommanded pitch occurred on autopilot which caused a pitch down of just over eight degrees, and a loss of altitude of six hundred feet. A second event occurred with a lesser pitch and a loss of 400'.
https://www.atsb.gov.au/media/3532398/ao2008070.pdf
This event isn't remotely like the 737 Max incidents under discussion elsewhere.
There's conspiracy speculation that the event was caused by military equipment located at exmouth in northwest australia. While the Australian Transportation Safety Board did downplay that and all other possible reasons, and was never actually able to determine a reason, it did suggest a possibility involving hardware and software.
It's important to understand that this event occurred a second time in roughly the same area with a second Qantas flight.
The chief contributing factor to the event is a "data spike," as cited by the ATSB (see link above, go to page 260 to cut to the chase. It's hyperlinked from the table of contents in the .pdf report).
The injuries that occurred were a result of people not wearing seat belts. Of the 303 passengers, 60 were not secured.
It lacks facts, you said. The fact is that an uncommanded pitch occurred on autopilot which caused a pitch down of just over eight degrees, and a loss of altitude of six hundred feet. A second event occurred with a lesser pitch and a loss of 400'.
https://www.atsb.gov.au/media/3532398/ao2008070.pdf
This event isn't remotely like the 737 Max incidents under discussion elsewhere.
There's conspiracy speculation that the event was caused by military equipment located at exmouth in northwest australia. While the Australian Transportation Safety Board did downplay that and all other possible reasons, and was never actually able to determine a reason, it did suggest a possibility involving hardware and software.
It's important to understand that this event occurred a second time in roughly the same area with a second Qantas flight.
The chief contributing factor to the event is a "data spike," as cited by the ATSB (see link above, go to page 260 to cut to the chase. It's hyperlinked from the table of contents in the .pdf report).
The injuries that occurred were a result of people not wearing seat belts. Of the 303 passengers, 60 were not secured.
06-06-2019, 07:01 PM
#3
Gets Weekends Off
Joined APC: Dec 2017
Position: Retired NJA & AA
Posts: 1,918
Good video, just finished watching it. I have 1300 hours on the A320 series and have had several WTF? moments with the automation but nothing like QF72. Uncommanded go arounds were the biggest problem, they were mostly caused by the non flying pilot forgetting to arm the descent mode on the FMS. Outer Marker or 5 miles out you let the computer take control of the landing speed, but if descent mode isn't armed when you push that button the computer thinks, OK, we're in cruise below 10,000 so I'll give them 250kts. Usually by the time the crew figures out what happened it was too late to salvage the landing.
When our A320's were fairly new we had a crew suddenly go around at LGA. When the tower said "say reason for the go around?" the Captain with his southern drawl said "Well, the jet decided to go around so we decided we'd better go with it".
When our A320's were fairly new we had a crew suddenly go around at LGA. When the tower said "say reason for the go around?" the Captain with his southern drawl said "Well, the jet decided to go around so we decided we'd better go with it".
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