To ask the Secretary of State for Defence, how many Apache AH1 helicopters are in service; what the annual maintenance cost is of those helicopters; and what the average number of operating hours are for each Apache AH1 helicopter.
There are 44 Apache Mk1 helicopters currently in service.
In 2018-19, based on an in-service fleet of 50 Apache Mk1 helicopters, the total annual maintenance cost was £33 million, and the average annual number of flying hours per Apache Mk1 was 183.3 hours. Six Apache Mk1 helicopters have since been withdrawn from service and are undergoing dismantling for conversion to the AH-64E variant.
Further to the answer I gave on 21 January 2020 to Questions 4324 and 4325, the calculation for the Apache maintenance cost per hour was based on 2019 flying hours. In the footnote to the table this was incorrectly recorded as based on financial year 2018-19 data. To ensure consistency, the table below provides revised Apache maintenance costs, based on financial year 2018-19 information:
Cost per annum
Cost per hour
*Numbers are rounded and to the nearest hour.