CHESHIRE Constabulary's £400,000 plane smashed into a fire engine and an ambulance as it responded to a 999 call, it was revealed last night.
The collisions happened as the Britten Norman Islander BN2 was preparing to take of f from Hawarden Airport, on the outskirts of Chester.
As it taxied along the runway it clipped a fire engine and then hit an ambulance, slicing off part of the roof with its wing.
Both vehicles were stationary when they were hit by the Islander.
Police last night confirmed the plane was responding to an emergency call at the time. Noone was injured in the incident.
It is understood the emergency services vehicles were taking part in a routine exercise on the airfield.
The plane was immediately halted after the collisions. It has been taken out of service with a badly-damaged wing.
The Islander only began operations seven weeks ago after it was bought by Cheshire Police to replace its former search and reconnaissance plane.
Last night, force spokeswoman Jacqui Hanson said she could not confirm how many people were on board at the time.
The Islander usually carries a crew of three, a pilot and two police officers.
She said: "The force plane was involved in a minor incident at Hawarden Airport involving a fire engine and an ambulance.
"No-one was injured but there was damage to a wing and we have taken the plane out of service for the foreseeable future.
"We cannot say how extensive the damage is at this stage but we are looking into the cost of repair. We are carrying out a full investigation."
She added: "It is not affecting our air support service as we are using the force helicopter instead."
The emergency services vehicles involved in last Friday's collisions were operated by Hawarden Airport, which is run by Airbus UK.
An Airbus spokeswoman said: "An investigation is under way into a minor accident at the airfield. We would not comment further until the outcome is known."
Cheshire Constabulary's air support unit, which comprises the plane and helicopter, is based at the airport.
The second-hand Islander, which is seven years old, was chosen by the force as it has more powerful engines and a higher fuel capacity than its predecessor.
Before it came into operation the plane was given a complete refit and blue and gold livery.
The aircraft is used for searches, surveillance, tracking and chasing offenders who are trying to escape.
Last night, a spokesman for the Air Accident Investigation Branch said: "This incident has been reported to us and we are investigating. Our report will be published in due course."
L A man who had suffered a heart attack died after the ambulance taking him to hospital was involved in a collision at a crossroads yesterday.
The middle-aged man, who has not yet been named, appeared to have had a second seizure after the ambulance collided with a car on its way to Durham's University Hospital.
The ambulance driver, a fellow paramedic and the driver of the car, a Seat Ibiza, were taken to hospital in a second emergency vehicle after suffering whiplash and shock.
Police accident investigators were making inquiries at the scene.