D150 / H500, London UK, 2007
D150 / H500, London UK, 2007
Summary
On 5 October 2007, a loss of separation occurred between a Hughes 369 helicopter and a Jodel D150. The incident occurred outside controlled airspace, in VMC, and the estimated vertical separation as the Jodel took avoiding action by descending, was assessed by both pilots to be less than 50 feet.
Flight Details
Aircraft
Operator
Type of Flight
Private
Flight Origin
Intended Destination
Take-off Commenced
Yes
Flight Airborne
Yes
Flight Completed
Yes
Phase of Flight
Cruise
Flight Details
Aircraft
Operator
Type of Flight
Private
Intended Destination
Take-off Commenced
Yes
Flight Airborne
Yes
Flight Completed
Yes
Phase of Flight
Cruise
Location
Approx.
Bricket Wood, UK
General
Tag(s)
Aircraft-aircraft near miss
HF
Tag(s)
Distraction,
Ineffective Monitoring
LOS
Tag(s)
See and Avoid Ineffective,
Released to Own Separation,
Near Miss
Outcome
Damage or injury
Yes
Aircraft damage
None
Non-aircraft damage
Yes
Non-occupant Casualties
No
Occupant Injuries
None
Occupant Fatalities
None
Off Airport Landing
Yes
Ditching
Yes
Causal Factor Group(s)
Group(s)
Aircraft Operation
Safety Recommendation(s)
Group(s)
None Made
Investigation Type
Type
Independent
Cite This Page
SKYbrary Aviation Safety. (June 2, 2023). D150 / H500, London UK, 2007. EUROCONTROL.
Retrieved February 2, 2026
from https://skybrary.aero/accidents-and-incidents/d150-h500-london-uk-2007
UID: 20054
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Description
On 5 October 2007, a loss of separation occurred between a Hughes 369 helicopter and a Jodel D150. The incident occurred outside controlled airspace, in VMC, and the estimated vertical separation as the Jodel took avoiding action by descending, was assessed by both pilots to be less than 50 feet.
The helicopter pilot's workload at the time of the incident was high as a result of frequency and transponder changes, and he did not notice the Jodel until it passed under his aircraft.
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Further Reading
- For further information, see the UK Airprox Board Report No. 148/07.
