Posted on June 17, 2019
Reports by the UK Airprox Board, which investigates near-misses, outlined two incidents over Birch in Essex.
Investigators said there had been other cases and the Apache Helicopter Force should “take note of this”.
The Ministry of Defence said it took all air incidents “very seriously”.
It said it welcomed all recommendations made in Airprox reports and would “do whatever we can to prevent them from happening again”.
The reported incidents involved Apaches from Wattisham Airfield in Suffolk and a light aircraft.
On 7 August 2018, an Apache pilot reported he came within 100ft (30m) of a light aircraft, although radar suggested it was within 400ft (121m), the first report said.
The second report said an Apache pilot reported he was flying at 1,250ft (381m) to Wattisham Airfield on 26 September 2018 when he spotted an aircraft at a distance of 1,640ft (500m).
They passed within 200ft (60m), the report said.
There was “no risk of collision” in either incident.