Flybe DH8D near Isle of Man on Feb 7th 2014, severe clear air turbulence injures two
Last Update: September 11, 2014 / 14:29:16 GMT/Zulu time
Incident Facts
Date of incident
Feb 7, 2014
Classification
Report
Airline
Flybe
Flight number
BE-402
Departure
Birmingham, United Kingdom
Destination
Belfast City, United Kingdom
Aircraft Registration
G-ECOH
Aircraft Type
De Havilland Dash 8 (400)
ICAO Type Designator
DH8D
The British AAIB released their bulletin releasing following discussion:
The aircraft probably encountered an area of Clear Air Turbulence (CAT) whilst in otherwise smooth air. CAT was not indicated on the forecast for the Isle of Man area, which was produced 24 hours in advance. The Met Office aftercast, using more up to date recorded meteorological data and data modelling, showed that some of the prevailing conditions, notably wind and temperature gradients, were conducive to the presence of CAT.
The operator’s passenger announcements include advice regarding the fastening of seatbelts, in case of sudden turbulence.
The AAIB reported, a flight attendant had been thrown off her feet in the cabin and received serious injuries. A doctor travelling as passenger provided first aid. A passenger received a minor injury. The flight attendant was taken to hospital after landing in Belfast.
The AAIB reported: "Recorded radar data for the area was available and examined for evidence of a possible wake turbulence encounter. No evidence was found of any other aircraft that could have had a significant effect on G-ECOH."
The AAIB summarized weather analysis: "The Met Office provided an aftercast, in which the available recorded data was reviewed, modelled and analysed to provide an assessment of the possibility of Clear Air Turbulence (CAT) in the area. The data showed that during the morning a deep area of low pressure over the Atlantic had moved rapidly to the east, building a transient ridge of high pressure over the United Kingdom (UK). There were two strong jetstreams (both over 100 kt) either side of the UK, which would have given rise to a large windshift. A wind data model at 400 hPa (FL240) showed that a large windshear would have been close to the Isle of Man at 0900 hrs and there were indications of a temperature gradient in the same area. Either or both of these factors can give rise to CAT. Analyses of the other available data suggested that cumulonimbus (CB) activity was not likely to have caused the turbulence and that this was a CAT event arising as a result of a large windshear in the vicinity of the Isle of Man."
Incident Facts
Date of incident
Feb 7, 2014
Classification
Report
Airline
Flybe
Flight number
BE-402
Departure
Birmingham, United Kingdom
Destination
Belfast City, United Kingdom
Aircraft Registration
G-ECOH
Aircraft Type
De Havilland Dash 8 (400)
ICAO Type Designator
DH8D
This article is published under license from Avherald.com. © of text by Avherald.com.
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