The 524G/H enignes must have improved dramtically since I was testing overhauled units, and they were only giving 10 degrees of margin off the cell. This was never fully understood by RR, a lot of work went ino the rework techniques of the HPC and HPT, though it appears the engine didn't like so much repair work. The -T core gave an instant guaranteed 55 degree boost to your EGT margin off the cell and excellent margin retention. But, the cost of $1.8 million per donk led to a few airlines having a sharp intake of breath. A quick glance in their wallets meant deciding not to go the whole way for the -T. Horses for courses as they would say in Epsom.
Brgd's
