When is everyone going to realise that it is a known problem on both the B757 & B767 pylons that they will have fittings crack.
Boeing brought in SBs for both B757 & B767 and they are ADs, problem is you have a very long time scale before they have to carried out.
My company carried out the SB known as Sips many years ago on its B757s, l think a 20 year age date is involved, so a good number of B757 are still to be done.
It is the same for the B767, not sure on compliance times for B767.
Basically any B767 built before around mid 1997 has the old designed pylon installed and is covered by the AD.
It is obvious that AA still has not carried out the terminating action for this SB on all its fleet.
Problem is that if you have the APB winglets fitted, the inspection for pre SB pylons is a very much reduced interval. Now l guess is that AA has inspected a few a/c and found cracks, so the interval is being reduced even more.
If you have a B767-300F a/c and want to install the APB winglets you are not allowed to until the Sips SB has been terminated.
So in all it is not a big surprise that AA has found cracks and by the way the B757 terminating SB has not stopped some of the pylon fittings cracking either.
