H500 / D150, en-route, North of London UK, 2007

H500 / D150, en-route, North of 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.

Event Details
When
05/10/2007
Event Type
HF, LOS
Day/Night
Day
Flight Conditions
VMC
Flight Details
Operator
Type of Flight
Private
Flight Origin
Intended Destination
Actual 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.
near Elstree, UK
General
Tag(s)
Aircraft-aircraft near miss
HF
Tag(s)
Ineffective Monitoring
LOS
Tag(s)
See and Avoid Ineffective, Near Miss
Outcome
Damage or injury
No
Non-aircraft damage
No
Non-occupant Casualties
No
Off Airport Landing
No
Ditching
No
Causal Factor Group(s)
Group(s)
Aircraft Operation
Safety Recommendation(s)
Group(s)
None Made
Investigation Type
Type
Independent

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 ft.

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, pages 40 - 42 of bookshelf entry, which was one of a number of incidents assessed at the December 2007 Board.

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