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.

Event Details
When: 
05/10/2007
Event Type: 
Day/Night: 
Day
Flight Conditions: 
VMC

18674

Flight Details
Operator: 
Type of Flight: 
Private
Flight Origin: 
Intended Destination: 
Take-off Commenced: 
Yes
Flight Airborne: 
Yes
Flight Completed: 
Yes
Phase of Flight: 
Cruise

18675

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

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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