A TAAG Angola Airlines Boeing 777-300, registration D2-TEJ performing flight DT-652 from Luanda (Angola) to Lisbon (Portugal), landed in Lisbon's runway 21 when the tread of the aft inboard right main tyre separated, broken pieces punctured flaps and caused damage to hydraulic lines as well as the right hand engine (GE90). The aircraft slowed safely and taxied to the apron.

The aircraft was unable to depart for the return flight DT-653 and is still on the ground in Lisbon about 75 hours later.

A replacement Boeing 777-200 registration D2-TED positioned to Lisbon the following day and performed the return flight as DT-6531 with a delay of about 24 hours.

MoKa777 wrote:

What would cause the tyre tread to rip off like that?

Apprentice wrote:

Hi: during quick turnarounds, effectivity of tire pressure check drops. Tire arrives to the gate warm or hot and actuall tire pressure is increased. I just remember a very few airliners who had quick turnarounds’ tire pressure check’s procedure, including a Warning: “Never Deflate a Hot Tire”: Air France, AOM..

Balerit wrote:

MoKa777 wrote:

What would cause the tyre tread to rip off like that?

Aircraft tyres are re-capped, which means that they get new rubber bonded to the tyre carcass. Usually the number one suspect is under inflated tyre pressures and the first thing that you do when the aircraft arrives at the gate is to take that tyre's pressure. What happens is that the tyre overheats causing the bonding to weaken and the recap flies off. In my years at SAA, I witnessed quite a few tyre treads thrown and usually they occurred while the tyre was relatively new and I've never seen an old or well used tyre throw a tread and funny enough always on take off - maybe the heavy load also played a part. My theory was that the recap bonding process sometimes wasn't done properly or maybe the tyre hadn't been prepared properly before hand. They actually buff the old cap off down to the first canvass ply and there is also a limit to the number of times a tyre can be recapped, I think 3 times.

Apprentice wrote:

Hi:
And just out of curiosity, inmatriculation any one?
Thanks