Yes Albert - I do indeed know what the categories are. The categories were as I stated and I do know what I helped repair.
The Harriers were both jobs that BAe turned down but "we" at 431 replaced both undercarriage mounting Beams and an integral water tank after a maintenance overpressurisation. The jobs took several years to complete.(mainly waiting for BAe to complete there tasks)
The Puma rolled over on the side of the river in Hameln and side skins, the Nose-Gear Box Structure and the Tail needed significant repairs. Giggest job was re-jigging the Barbeque Plate on the cabs roof inside the MU MT Hangar.
MARTSU (MASU) did not deploy to NW Europe which was the sole reserve of 431MU