Delta off the Runway - LGA

Trip7 said:
My biggest concern with the 88 landing on contaminated runways are the thrust reversers. Not only are they notorious for coming out asymmetrically, above 1.3 EPR it'll blank the rudder. Additionally, on the landing rollout you have to develop a cross scan between keeping the airplane on the centerline and looking at your EPR and/or N1 gauges to see what in the world the each reverser are up to. Landing is the reversers split to get equal EPR settings are common. They truly are like a box of chocolate, you'll never know what you're gonna get. Pull reversers with similar force on two different airplanes one airplane you barely crack the buckets the other airplane you're rapidly approaching or exceeding EPR limit. Taming 88 reversers is a skill that takes a while to acquire. A Captain once joked "When you figure it out give me a call".

A full investigation will undoubtedly determine the cause but when I heard the plane went off the side of the runway those reversers were the first thing that popped in my mind.
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I will second that. Looking at the video a few posts back you can see the nose gear hard over on a dry runway and the aircraft tracking straight ahead. Once the nose gear is centered up the takeoff is continued. If that is how the aircraft tracks on a dry runway imagine a contaminated one.

Now add the thrust reverser element as described in a previous post and you have a recipe for real directional control problems on landing.
 
Have we established whether the pilots were wearing their hats and had the proper number of blazer buttons fastened during/after the evacuation?

On a more serious note, it's great to see there were no serious injuries, especially in a situation with reduced braking action, and water just off the end of the runway.
 
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Autothrust Blue said:
Current weather:
Code: 
KLGA 051651Z 32016KT 1/4SM R04/2800V4000FT SN FZFG FEW006 OVC012 M03/M05 A3015 RMK AO2 SLP210 P0005 T10331050 $
I'm just gonna stay on the couch today; that seems very unpleasant. We do take this thing to LGA, but I haven't been out there in it yet. West coasters don't normally get out that way.
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I've done it! Expressway visual every time. Fun approach.

Now back to your regularly scheduled program!
 
Joshwa said:
TALPA = Takeoff And Landing Performance Assessment

I have excised the table below from our information. The idea is based on the reported conditions you can estimate the braking action. You only use PIREPs if the reported braking action is less than given in the table. It was developed by the FAA and I assumed you were all using it given it had made it here.


View attachment 30472
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I've never seen that before in my entire life.
 
I've been googling around. Looks like a few European operators have taken it on this winter, and the FAA docs suggest a 2016 rollout for you guys.

It has been trialled for the past few years apparently. Looks like our Matrix is an in-house thing. There are loads of FAA and academic documents if you google TALPA matrix, but you have to be a proper performance geek like me to read through them.
 
WestIndian425 said:
"SMART CI AVAILABLE"
"Goal: SCHED INTEGRITY"
"Climb: 253/0.63M" <---- yeah, okay!
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I never follow those numbers. Ok, that's a lie. I disregard the mach. I'll do the 253 until .70 in the 200. In the 700 I never follow the mach. Although, I've never seen it below .74 if the system knows you're cruising above FL330.

The one time I recall not following those numbers, AT ALL, was on a flight in the 200 from IAH-CLT. We had a wicked tail wind and the system knew it. Wanted us climbing to cruise at 238 knots. Yea, ok.
 
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