China Airlines 747F damages two engines at ORD
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China Airlines 747F damages two engines at ORD
With a dozen or more containers as collateral damage ...
ADS-B track would suggest it diverged by about 45 m from the taxiway across the SE Cargo Ramp at O'Hare on arrival.
https://wgntv.com/news/chicago-news/...lane-at-ohare/
ADS-B track would suggest it diverged by about 45 m from the taxiway across the SE Cargo Ramp at O'Hare on arrival.
https://wgntv.com/news/chicago-news/...lane-at-ohare/
If the video is normal speed, that crew was taxiing way too fast given the conditions…notice the cargo can getting injested into the #1 Engine. Wow
Last edited by Pilot DAR; 29th Jan 2022 at 12:26. Reason: Removed racist comment
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I suspect that the video is showing the event very "speeded up". The time between the two flashes of the top and bottom red flashing beacons is 12.3 seconds in the video, where other videos I find of B747 beacons appear to show the beacon flash period to be just over a second. So the video is maybe ten times actual speed?
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There is a time stamp in the upper left corner and the seconds counter seems normal.
This is a video (taken probably on a phone) of the display screen showing a replay of a timestamped security camera video with a frame rate of probably around 10 fps, which is then adjusted for real time playback (normal video is 30 fps). The aircraft appears stopped at the beginning because the replay is paused. The short beacon flashes are not captured with the original slow frame rate, but the relative motion paths are real. You can see it on the motion of the reversing tug at the end. There was also a snow plough right ahead which also starts reversing before disappearing behind the aircraft. Agree with the initial assessment, way too fast for the given conditions, though I'd argue it was not the speed that mattered in his case. Doubt that tea and biscuits will be offered...
Last edited by andrasz; 29th Jan 2022 at 14:16.
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There is a considerable upslope off S2 into the ramp (see video) and he appeared to be nose high staring into the lights with little or no visibility under the nose and snow covered taxiway markings. Probably had a handful of thrust to get up the slope and the aircraft ran away with them .... if it was 12 knots it would be way too fast under these conditions. Nose wheel might have had little traction with snow and coming off slope and abrupt or excessive tiller would easily have lost any traction that it did have. Body gear activation would have made it worse. Park brake set and tow truck might have been a good option. Easy to say after the event.
Last edited by offa; 29th Jan 2022 at 15:40.
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Taking all into account it looks normal speed to me. There is significant 'barreling' of the image due to a rather wide angle lens hence the horizon appears to drop away the further you go way from the centre.
I think he was talking about the video speed, not the aircraft speed....
The last frames show a service vehicle rapidly reversing and hitting some containers. Hard to blame the rampie in urgent survival mode.
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My guess……..it was not the snow that was particularly slippery. I suspect that there was smooth ice that had formed at the gate at some point, perhaps very recently. Then snow fell on top of it. Meanwhile, the taxiways were mostly snow over pavement. Therefore, minimal issues while taxiing on a route with several turns leading to a false sense of security and the assumption that the parking area was the same.
The 747 is one of the few widebodies where you can see your wingtips from the cockpit window. In fact if you plonk your cheek on the glass you can see number one engine too. In a tight spot you can always use that secret look out the window technique. Coupled with slowing down there is no need to vacuum up half the airport.
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The 747 is one of the few widebodies where you can see your wingtips from the cockpit window. In fact if you plonk your cheek on the glass you can see number one engine too. In a tight spot you can always use that secret look out the window technique. Coupled with slowing down there is no need to vacuum up half the airport.
Here is a plot of the path the 747 took on the taxiway. Obviously he was confused, and coupled with snow covering most of the taxiway markings you can see what may have caused this accident.