87 the aft lip region 86 and the multi hole panel region 84 must be replaced these items are provided as replacement parts the aft lip region 86 and aft seal flange region 87 are formed and provided as a single part the aft lip region 86 and aft seal flange region 87 may be initially machined or formed as a single part however these items are currently formed or machined individually and then joined together such as by welding or brazing to form a single part how this part is fabricated is not an important feature of the present invention however the aft seal flange region is provided with a weld prep at joint 3 which will become weld joint 3 similarly aft support leg 88 is provided with a mating weld prep at joint 3 to permit the aft support leg 88 and aft seal flange region 87 to be joined forming a weld joint 3 when joined similarly the replacement multi hole panel region 84 is provided with a weld prep at its forward end allowing it to be joined to the inner panel assembly at joint 1 of course inner panel assembly also has a weld prep formed at joint 1 after the above described cut is accomplished when the multi hole panel region 84 is welded to the inner panel assembly a weld joint is formed at joint 1 the multi hole panel region 84 also has a weld prep formed at its aft end corresponding to a weld prep formed or machined in the forward end of aft lip region 86 allowing the multi hole.