Harrier GR3 RAT
A little bit of thread creep. However, to answer Jackoniko's query about the RAT on the GR3.
The RAT's main job was as a back up in the event of engine driven hydraulic pump failure, not engine failure. Service experience showed clearly that instead of adding integrity to the hydraulic system, the RAT detracted from it by being the prime cause of most hydraulic problems. In an aircraft where weight (sorry, mass, under JAR-OPS!) is always at a premium, it was a no brainer, even for the RAF, to delete the RAT.
As to deadsticking a GR3, with the gliding characteristics of a brick and a 12,000' landing roll, no thanks.