All three West Midlands air ambulances have resumed to normal services following their suspension.
The West Midlands Ambulance Service (WMAS) ground the three aircraft on Thursday after tests raised concerns over their EC 135 helicopters - the same which crashed into The Clutha bar in Glasgow on 29 November, killing 10 people.
WMAS has confirmed all three helicopters have resumed service "following extensive inspections by engineers from Bond Air Services."
Two of the three helicopters used by the Midlands Air Ambulance remain grounded today as inspections continue.
The entire fleet was grounded by the company which operates its EC-135 craft after a fault was found in another model.
One of the choppers, based at Tatenhill airbase in Staffordshire, was cleared for flight on Thursday by engineers from Bond Air Services - but the other two, based at Cosford and Strensham, are still being examined.
It is hoped they will return to service tomorrow.
West Midlands Ambulance Service spokesman Steve Parry said:
Safety is our highest priority and we will be guided by the operator of the aircraft.
Medical crews that would normally have been flying have been responding on land vehicles as they would if inclement weather had stopped the helicopters operating.
Bosses at the Midlands Air Ambulance have vowed rescue services will continue - despite being limited to land ambulances.
Speaking after the charity was forced to suspend its air rescue service following a fault with a similar model, chief executive Hanna Sebright said:
The safety of public, our aircrews and patient care will always remain our priority. I can confirm our aviation partner, Bond Air Services, has temporarily suspended our three helicopters.
This is purely a precautionary measure as a result of a defect found by Bond which requires further investigation.
We expect the suspension to be short term and temporary while checks to our three aircraft are completed.
While the investigations are being carried out, our aircrews will continue to provide patient care via our rapid response vehicles, which are located at our RAF Cosford, Strensham and Tatenhill airbases.
We are working closely with Bond Air Services during this time and will inform the public when our helicopter emergency medical service is back online.
– Hanna Sebright, Midlands Air Ambulance chief executive