HelicoptersTracking @ (optional) Send Locations YearsLocationICAO/FAA Models Years Models Hughes OH-6A Cayuse McDonnell Douglas MD369E / MD500E MD Helicopters MD500E St Louis County Police Department List of helicopters C/N VersionBuiltIn this Org In other Org 0105E md500e 1984 N911CP : St Louis County Police Dept (SLCPD) at Clayton, MO from Feb85 591176 oh-6a N911EP : St Louis County Police Department (SLCPD) at Chesterfield, MO from Apr97; + 68-17216 0614E MD500E 2012 N911MU : St Louis County Police Dept (SLCPD) at Clayton, MO from Dec12 : duck hit windscreen N4115B 0599E MD500E 2009 N911NY : St Louis County Police Dept (SLCPD) at Chesterfield, MO from Feb10 0217E md500e 1987 N911PH : St Louis County Police Dept (SLCPD) at Clayton, MO from Oct91, test serial+ 1080811 oh-6a N911TQ : St Louis County Police Department (SLCPD) at Clayton, MO from Sep99 67-16426