This seems like a bit of deja vu, all over again
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On the JT9D on the 747 and 767, we had problems with engine bending and compressor case distortion causing excessive tip rub, efficiency loss, and engine surge.
Again on the 747 and 767, the PW4000/94" had problems with compressor case distortion causing excessive tip rub, efficiency loss, and engine surge (it got so bad on the PW4000 that the FAA issued an AD, forcing Pratt to redesign the compressor and retrofit over 2000 engines with new compressors at a cost of several billion dollars).
So, now, on the F135 we have a problem with engine bending and case distortion causing excessive tip rub. Hum, I wonder what the common thread might be
BTW, I like the implication that wasn't that bad because it wasn't the engine that caught fire, it was the ruptured fuel tank. Yea, that makes me feel much better...
