WR963 did have a re-spar at Bitteswell, the first of the AEW2 to be sent there in 1976. It was the second set of spar booms fitted, the first replacement being done for the Phase III upgrades to MR2.
8 Sqn got their money's worth thats for sure, with 15,483 flying hours on the clock. However, there's still a bit of life left in her if the NDT shows up no surprises... some 594 hours left until we reach the safe life on the lower booms. If the NDT does show up any problems we still have the spar boom and the fatigue remediation drawings in the archive, so a rebuild to flying condition will still be achievable but will take a little longer.