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Wise87

Brakes/Tires 747-8 Overheat

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Myself and another user just finished up our second flight with the 747-8. The first leg was from KPAE to KSDF, 3.5hrs. Weather at KSDF was cool, rainy, with wet runways. On our second leg we flew from KSDF to OMDB. After 12.5 hours we landed at OMDB at early evening, 96*F. We both used brakes 2 and reverse. They have long runways so we were light on the brakes and rolled all the way to the end. We both had over heated brakes and tire failures. We had to use maintenance to repair them in ordered to taxi. I we have flown the 747-400 and the 777 and never experienced overheated breaks before. Is there a way to turn it off completely?  

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I've flown the KSDF OMDB flight several times in the -8F and never had a problem with brake heat, especially autobrake 2 setting. Did you use autobraking all the way to the turnoff or did you manually brake the last couple thousand feet?  Also, I assume you cooled the brakes using ground maintenance before departing Lexington, but a 12 hr flight should have cooled them for you if not. So the only guess I have is that you manually braked with a heavy foot leaving the runway.

Edited by downscc
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55 minutes ago, Wise87 said:

Myself and another user just finished up our second flight with the 747-8. The first leg was from KPAE to KSDF, 3.5hrs. Weather at KSDF was cool, rainy, with wet runways. On our second leg we flew from KSDF to OMDB. After 12.5 hours we landed at OMDB at early evening, 96*F. We both used brakes 2 and reverse. They have long runways so we were light on the brakes and rolled all the way to the end. We both had over heated brakes and tire failures. We had to use maintenance to repair them in ordered to taxi. I we have flown the 747-400 and the 777 and never experienced overheated breaks before. Is there a way to turn it off completely?  

I landed at VHHH 25R last night (OAT 31C) at a fairly heavy 695,000lbs, Flaps 30, AB 3, full reverse. Brake temps in the 3.5 region as expected.

When the -8F is heavy, using reverse to keep the brake temps down is key. 

Have you double checked your brake axis? Just to make sure it's not sticking on. 

Edited by calzonister

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19 minutes ago, calzonister said:

I landed at VHHH 25R last night (OAT 31C) at a fairly heavy 655,000lbs, Flaps 30, AB 3, full reverse. Brake temps in the 3.5 region as expected.

When the -8F is heavy, using reverse to keep the brake temps down is key. 

Have you double checked your brake axis? Just to make sure it's not sticking on. 

Thanks for the info. I brought it up because it happened to two of us. 

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