retroaviation wrote:
The way I understand it, that's not entirely true. I was just told yesterday by Ben Cox (who's kind of the "main mechanic" on this particular Shack), that the British have a number of hours before each airplane is considered "bad."
If you meant the
manufacturer of the aircraft specifies a life for certain components, you're correct. This is not a British thing, and you'll find any manufacturer considers various bits to be lifed.
Throughout service fatigue is monitored and on certain types life extensions can be made - sometimes by reinforcing the item, sometimes by simply re-writing the limitation, and sometimes, as in the case of the Shackleton spar, by
replacing the item.
Quote:
Kind of like a jug of milk, I reckon. However, this Shackleton was "given" extra hours I think a couple of times while in service with the Royal Navy.
Royal Air Force, please! It is written on the side of the aircraft, after all.
It wasn't "given" extra hours - it was given a new spar, in 1980, having been flown since 1953 on the original. So if you assume 27 years of life for a spar, guess which year it's about due a new spar in...! The manufacturer don't want it dropping out of the sky on somebody's head, and neither do the Civil Aviation Authority - she's a very old girl and I can understand the concerns. I'd love to see her continuing to fly, but she's wasted in the USA and I can't see anybody having the money in the UK to pay the million pounds or so needed to respar her, never mind operating her afterwards.