The Westcountry Ambulance Trust says it will investigate claims it could have arrived sooner to help a Cornish teenager who died after being kicked in the head by a pony.
Victoria was grooming her pony when another horse lashed out
Victoria Ivey, 13, from Hayle sustained the fatal injuries at the family stables near Camborne on Tuesday.
But the neighbouring farmer who raise the alarm has criticised the ambulance service for the length of time a crew took to find the field where the accident happened.
But the trust has said its response time was within its official guidelines.
Denis Archdale says he gave detailed directions to ambulance control.
But he believes there was still an unnecessary delay because the system could not find the location.
"I gave my postcode," said Mr Archdale.
"I explained that the accident happened about a third of a mile away and it was just a field.
"I was then asked where the nearest village was which was Carnell Green, and she couldn't find that on the map.
"She couldn't find Connor Downs on the map but she could find Gwinear and that's two miles away from me."
Westcountry Ambulance Service declined to be interviewed about Mr Archdale's comments.
But a spokesman said a paramedic was on the scene within the 17.5 minute target response time and that they will be investigating the claims.
Victoria was grooming a family pony in a field at Old Mill Lane, Roseworthy, near Camborne, when a horse kicked her.
The teenager, said by her family to love horses, suffered serious head, face and chest injuries.
Victoria was flown for treatment to the Royal Cornwall Hospital at Treliske by a helicopter from RNAS Culdrose.
A member of the ambulance crew then travelled on board the helicopter to treat the girl during the flight but she later died from her injuries in hospital.
The teenager's grandmother Sybil Ivey, 74, said Victoria was grooming her pony when another horse in the same stables lashed out.
Paying tribute to her granddaughter, Mrs Ivey said: "She was a lovely girl, very talented and very artistic. Her one love was horses.
"She had been with horses all her life. Her mother is a great horse lover and they have got four horses. They all ride except my son, who doesn't like them."
Mrs Ivey said Victoria's parents, Graham and Barbara, were "absolutely devastated" at the loss of their daughter.
They have two other children William, 12, and Megan, nine.