Ah the 744- such a wonderful machine! I used to be able to do many touchdowns where the only way you knew you'd contacted Earth was the activation of the speedbrake lever. So nice to handle in gusty winds, strong crosswinds, heavy weight- Boeing did such a good job refining the 747, especially that shock absorbed undercarriage, to sheer perfection! Can't help with your query at all, but thankyou for taking me back! Apart from the VC10, it's the only aeroplane I've ever really missed (followed by the B58 Baron)!