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MedRxx

(58 posts)
Mon Feb 13, 2023, 05:46 PM Feb 2023

United Airlines 777 Nearly Crashes Departing Hawaii (Dec 18 2022, just being reported now )

I am surprised this has not been posted, as is all over MSN--but with all simply repeating the same thing.


This is the radar altitude track of the near disaster

The brief facts as gleaned from an aviation site {see below}is that a few minutes after takeoff UAL 1722 lost control at 2,200 feet, and began an up to 8,600 foot-per-minute uncontrolled descent over a 45 second period which was arrested only 775 feet above the ocean.

This descent was apparently totally missed by Air Traffic Control as instead of ATC saying something like "United 1722 Heavy, Say Altitude!!" no comment at all was made and 1722 was routinely cleared on its way.

Upon arrival in San Francisco, the pilots apparently filed an "Aviation Safety Reprotting System" report--which allows for a 'get of of jail free' card if a report is made to ATC or the FAA about an incident. The plane had a routine turnover in SF and then continued on to Chicago.

When this news broke, UAL would only say that “United then closely coordinated with the FAA and ALPA {Airline Pilots Association} on an investigation that ultimately resulted in the pilots receiving additional training. Safety remains our highest priority."

Very strangely, there was apparently NOTHING posted on social media about this harrowing experience by anyone. The article speculates this may have been because the same day people were seriously injured on a Hawaiian Airlines flight near Maui.

There is SO MUCH of CONCERN here. Aviation seems to be suffering the same widespread rot as is experienced by many professions.


A United Airlines Boeing 777-200 came within around 800 feet of impacting the Pacific Ocean off the north coast of Maui shortly after takeoff on December 18. The occurrence, not previously reported, adds to a series of extremely serious safety incidents and major operational disruptions within the U.S. aviation system in recent weeks.

Flight 1722 from Maui to San Francisco left Kahului Airport at 2:49 PM Hawaiian time in stormy weather and initially appeared to climb normally. Granular data analyzed with Flightradar24 showed the aircraft reached roughly 2,200 feet before beginning a steep dive that, according to the tracking telemetry, reached a descent rate of nearly 8,600 feet per minute.

The aircraft quickly recovered, but not before descending below 775 feet. Two people familiar with the incident said the climb produced forces of nearly 2.7 times the force of gravity on the aircraft and its occupants as that steep descent transitioned to an 8,600 foot per minute climb. The entire incident appears to have stretched no more than 45 seconds and in between radio calls with air traffic controllers in Maui, according to LiveATC recordings reviewed by The Air Current.

The aircraft subsequently climbed to 33,000 feet and landed in California 27 minutes early after the 4-hour and 15-minute Pacific crossing. The Boeing widebody configured with 364 seats was quickly turned around at SFO and departed to Chicago on its next flight about two and a half hours later.

https://theaircurrent.com/aviation-safety/united-maui-dive-ua1722-close-call/

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United Airlines 777 Nearly Crashes Departing Hawaii (Dec 18 2022, just being reported now ) (Original Post) MedRxx Feb 2023 OP
Yikes, wonder if they had to get a lot of upholstery cleaned? Ocelot II Feb 2023 #1
Sounds like maybe wind shear/down draft nt EX500rider Feb 2023 #2
Sounds like sheer terror Hekate Feb 2023 #12
Kick dalton99a Feb 2023 #3
Let's see. They lose control at 2,200 feet. Or more? GreenWave Feb 2023 #4
Caught That Too ProfessorGAC Feb 2023 #9
Checked over at Airliners.net: EX500rider Feb 2023 #5
Hasn't that Pilot that landed on the Hudson been critical of JI7 Feb 2023 #6
UAL mentioned the pilots were getting REFTRA--but that's only part of the problem MedRxx Feb 2023 #10
Message auto-removed Name removed Feb 2023 #7
Is your ignorance bliss? NewHendoLib Feb 2023 #8
Another near miss at an airport - what's going on?? Rhiannon12866 Feb 2023 #11

GreenWave

(12,640 posts)
4. Let's see. They lose control at 2,200 feet. Or more?
Mon Feb 13, 2023, 05:58 PM
Feb 2023

I think a number is missing/wrong because the math does not add up.
6450 feet dropped (based on 45 seconds and Alexa!)

Whew!

ProfessorGAC

(76,693 posts)
9. Caught That Too
Mon Feb 13, 2023, 06:14 PM
Feb 2023

One of those numbers has to be incorrect, or at least incompletely reported
You can't start at 2,200', drop 6,400 feet and not hit the water.
The plane wasn't falling straight down, maybe the 6,450 feet/minute was airspeed, with a significant fraction of that being down.
But, that doesn't seem right either, because that's only 108 feet per second which is only about 74mph. Way too slow.
Either way, scary.
I was coming back from Italy once and we fell from around 40,000 feet to about 38,500 is 6 to 8 seconds. That was pretty scary, but nothing like this.

EX500rider

(12,581 posts)
5. Checked over at Airliners.net:
Mon Feb 13, 2023, 06:00 PM
Feb 2023

Last edited Mon Feb 13, 2023, 06:36 PM - Edit history (1)

Word on my street is that it was a Flaps 20 takeoff and once Acceleration Height was reach to start retracting flaps on schedule, flaps were brought up from 20 to UP skipping 15 and 5 completely on accident. At max gross weight and low speed.
ouch

JI7

(93,615 posts)
6. Hasn't that Pilot that landed on the Hudson been critical of
Mon Feb 13, 2023, 06:04 PM
Feb 2023

some of the things going in with oversight, safety measures etc ?

MedRxx

(58 posts)
10. UAL mentioned the pilots were getting REFTRA--but that's only part of the problem
Mon Feb 13, 2023, 06:42 PM
Feb 2023

Maui KOGG ATC could use a little polishing {REFresher TRAining} too.

Doubt that Jimmy Hogg would be happy with this level of airmanship



Response to MedRxx (Original post)

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