The first eight helicopters were built by Boeing; the remaining 59 were assembled by Westland Helicopters (now part of AgustaWestland) at Yeovil, Somerset in England from Boeing-supplied kits.
ທໍາອິດ ແປດ helicopters ໄດ້ຖືກສ້າງຂຶ້ນ ໂດຍ Boeing , ສ່ວນທີ່ຍັງເຫຼືອ 59 ໄດ້ຖືກ ສະ ໂດຍ Helicopters Westland (ໃນປັດຈຸບັນ ສ່ວນຫນຶ່ງຂອງ AgustaWestland) ຢູ່ Yeovil , Somerset ໃນ ປະເທດອັງກິດ ມາຈາກ ຖົງ Boeing ສະຫນອງ .