DAL 747-400 scrapes an engine
04-15-2013, 12:04 AM
#11
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Joined APC: Jun 2007
Position: Legacy FO
Posts: 4,096
Originally Posted by HercDriver130
Looks to me like a VERY firm touchdown... with no correction at touchdown for the wing low crosswind technique....
would be interested to know what the winds were at the time of the incident
would be interested to know what the winds were at the time of the incident
Originally Posted by Snarge
for the same reason '130 guy' said this....
04-15-2013, 01:43 AM
#12
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Joined APC: Oct 2009
Position: Delta M88 A ATL
Posts: 383
Because of the right aileron input during the touchdown, the ground spoiler deployment occurs first on the right wing. This seems to increase the bank further and the engine hits the ground.
The 74 lands nicely in a crab with the body gear able to swivel and straighten out the ground track on touchdown. We always were taught to land it in a crab.
The 74 lands nicely in a crab with the body gear able to swivel and straighten out the ground track on touchdown. We always were taught to land it in a crab.
04-15-2013, 04:19 AM
#13
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Joined APC: Oct 2007
Position: Sr. VP of button pushing
Posts: 2,730
Originally Posted by Yoda2
I would be curious to know the criteria used to establish the bank limit. I'm not so sure it would be combined with dropping it in, and bending the wing as was demonstrated in the video.
Pitch about the aft body gear centerline
LE flaps fully extended
Aileron full down
Roll around wing gear outside tire
Stabilizer full nose up
Elevator full down
Struts compressed
Flaps 30
It shows you'll drag a RR pod with 6 degrees bank at 5 degrees pitch up or about 5.5 degrees bank at 8 degrees pitch up. P&W and GE engines give you an extra degree of bank before impact. Another chart gives tail clearance. Five degrees up gives 55 inches clearance, eight degrees up give 30 inches and ten gives 10 inches clearance.
04-15-2013, 05:28 AM
#14
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Joined APC: Mar 2008
Position: Curator at Static Display
Posts: 5,681
Originally Posted by nerd2009
Because of the right aileron input during the touchdown, the ground spoiler deployment occurs first on the right wing. This seems to increase the bank further and the engine hits the ground.
The 74 lands nicely in a crab with the body gear able to swivel and straighten out the ground track on touchdown. We always were taught to land it in a crab.
The 74 lands nicely in a crab with the body gear able to swivel and straighten out the ground track on touchdown. We always were taught to land it in a crab.
04-15-2013, 10:13 AM
#15
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Joined APC: Apr 2007
Position: B744 FO
Posts: 375
Originally Posted by UAL T38 Phlyer
What if the Body-Gear Steering is MEL'd and disabled? Been too many years; can't remember the implications.
04-15-2013, 01:31 PM
#16
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Joined APC: May 2010
Position: Baja Vermont
Posts: 5,177
I used to take LTs out in a truck to side of the runway (well clear, but a good view) while the local pro did xwind landings--made them cautious!
The initial touchdown looked well within 5 degrees, but when it bounced, really just got light on its "feet" the deploying spoilers and aileron started the roll into the wind. No 744 experience, so no guess as to control wheel position.
GF
The initial touchdown looked well within 5 degrees, but when it bounced, really just got light on its "feet" the deploying spoilers and aileron started the roll into the wind. No 744 experience, so no guess as to control wheel position.
GF
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