 GSM Helicopters
| Model | Del'd | From | To | | Westland Sioux |
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| Model | C/N | Built | ID | | Sioux | wa593  | 1967 | G-BENG : 09sep80 crashed Barmby Moor whilst spraying pesticides on crops. ... 
: GSM Helicopters Ltd at Ripon, Yorkshire; w/o 24jun83
| | Sioux | wa603 | 1967 | G-BFJT : GSM Helicopters at Ripon, Yorkshire until 24jun82 to Cyprus 5B-CE ...
| | Sioux | wa712/was234 | 1969 | G-BGFS : Reg to GSM Helicopters at Ripon, Yorkshire, w/o 30jun82
: Stored with Alpha Aerotech at Chilbolton by Mar 1990.
| | Sioux | wa707/wat229 | 1969 | G-BGKK : GSM Helicopters at Ripon, Yorkshire, 16jun82 to 5B-CEW
| | Sioux | wa457 | 1967 | G-BGTZ : GSM Helicopters at Ripon, Yorkshire, 05Aug83 to Cyprus as 5B-CFJ
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5 Construction Numbers in this organisation found
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