PPRuNe Forums

PPRuNe Forums (https://www.pprune.org/)
-   Safety, CRM, QA & Emergency Response Planning (https://www.pprune.org/safety-crm-qa-emergency-response-planning-93/)
-   -   Barely controllable Tu-154 - another UA232 (https://www.pprune.org/safety-crm-qa-emergency-response-planning/450293-barely-controllable-tu-154-another-ua232.html)

Walder 1st May 2011 11:19

Well – If I realize at control problem right after rotation or even during rotation, I might forget the gear, especially if I still have at positive rate.

fantom 1st May 2011 11:20


BTW Dutch roll is only at high altitude.
Not so tatin. The Hawker Hunter would quite happily dutch roll on finals (big wing/small fin). In airliners generally though, you would be correct - it has been designed out.

Mahatma Kote 1st May 2011 11:22

In the first video you can see some form of explosion after lift-off. It's a slightly orange cloud that appears while the aircraft is on full thrust and a few hundred feet off the ground.

sycamore 1st May 2011 11:24

Maximum respect to the crew for getting it down in one piece..I think the message to all pilots who have a control malfunction is ,never , never give up..

rmac 1st May 2011 11:36

Not only a case of brown underpants, but they must have filled a few barf bags at the same time....amazing

Andy Brandt 1st May 2011 11:53

Good Job!
 
Very good job. the last moments on final before it disappears below the tree line look like its curtains.

flaphandlemover 1st May 2011 11:58

At around 33 sec into the video:

if you only look at the right outer wing you can see aileron movements.....

Very bizzare...

Walder 1st May 2011 12:43

I observed the same smoke, but when I played the video again, I observed the same cloud in FRONT of the aircraft = It was a little cloud.

despegue 1st May 2011 13:22

it is a regular SOP for initial test flights, be it a first flight of a new type or after a prolonged storage to leave the gear down. You want to keep things as simple as possible in case of a series of failures...

We used to practice to steer our cessna's with only power and using the doors during initial training (long ago...):ok:

Did the frozen yoke thing in the sim. Great excercise to see the effect of your rudder and to get better rudder-feeling.

At Sabena, one simulator item on Airbus was to land the plane on the runway using rudder/thrust/trim if I remember correctly.(haven't flown the Airbus for 8 years now) it was "fun"...:eek: but had to be successful...

Sqwak7700 1st May 2011 14:21


undamped yaw roll situation.
Well, yeah, they had no pitch and roll control according to the videos, so it looks like the guy was stepping on the rudder or using diff-thrust to swing the nose and make the plane pitch down.

lomapaseo 1st May 2011 15:30

Was there an aircraft malfunction confirmed ?

Machinbird 1st May 2011 15:30


russian pilots do have balls!
Well, actually, it looks like they were just trying to keep them. Bet they were covered in sweat when that was over. They definitely earned their pay. BIG attaboy to the crew.:ok:
The nose seems to be describing a figure 8 lying on its side. I didn't hear thrust variations on the overflight portion of the video.
Maybe the pitch damper gyro got connected to the yaw damper and vice-versa.
Had to be a maintenance foul up. If a test flight, they would have minimum crew. Do they use a FE on the TU-154? Might have been flopping around too bad to ambulate over to an offending piece of equipment and disable it.

DJ77 1st May 2011 15:33

At 0:27 in the first video there is a red flash below the tail. I don't think it's a strobe light.

Congrats to the crew.

BOAC 1st May 2011 16:00

Vaguely reminiscent of the Boeing that got airborne in the UK with the ailerons reversed after maintenance. The 'wing-rocking' began well before the small 'flash'.

pattern_is_full 1st May 2011 16:04

Actually, if you look at the same videographer's #4 video (not part of this series - a normally operating 154) there is a red strobe under the tail that flashes every so often.

The physical light unit can be seen sticking down aft of the flaps in this still image: http://upload.wikimedia.org/wikipedi...lev_Tu-154.jpg

liider 1st May 2011 16:30

Some moments before flare and touchdown:

http://s003.radikal.ru/i204/1105/a3/eca06097dc8b.jpg

pattern_is_full 1st May 2011 17:02

Left spoiler and aileron up. Wrong angle to be sure of rudder deflection (except it isn't hardover to the right). Is that a partial slat deployment ahead of the R main gear?

Would those parts stay out in the slipstream with a total loss of hydraulic pressure? Would the spoilers be part of manual control reversion in a hydraulic failure?

In a still photo, we can't tell if they are stuck that way or if the pilots were using them intentionally to correct that right bank.

No flaps, but that could be by choice. If the controls are wonky, who wants to deal with a potential split-flap deployment on top of everything else.

Ptkay 1st May 2011 18:07

For me, comparing with other Tu-154 images,
there is a full left ruder deflection.

aviatorhi 1st May 2011 19:05

While I'm still skeptical as to what actually happened. It almost seems as if the rudder wasn't receiving any control inputs/wasn't attached to its servos whatsoever, the photo before touchdown and video confirm they had ailerons/spoilerons working, and had some form of pitch control. Seems a rudder that is "fluttering" would give this sort of result. A friend had a similar thing happen to him in a Cessna 207 with the elevator trim tab. As he described it: "it shook the **** outta me".

Walder 1st May 2011 19:42

I feel the incident is a little strange:bored:
I did not see any firetrucks at any picture og video:confused:
It seems like braking were normal!

:confused::confused::confused:


All times are GMT. The time now is 10:06.


Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.