Serious incident Leonardo (Agusta Westland) AW189 G-MCGV,
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ASN Wikibase Occurrence # 376598
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Date:Friday 7 January 2022
Time:16:22 UTC
Type:Silhouette image of generic A189 model; specific model in this crash may look slightly different    
Leonardo (Agusta Westland) AW189
Owner/operator:HM Maritime and Coastguard Agency
Registration: G-MCGV
MSN: 92008
Year of manufacture:2017
Fatalities:Fatalities: 0 / Occupants: 4
Aircraft damage: Minor
Category:Serious incident
Location:6nm from Lydd (London Ashford) Airport, Romney Marsh, Kent -   United Kingdom
Phase: En route
Departure airport:Lydd International Airport (LYX/EGMD)
Destination airport:Lydd International Airport (LYX/EGMD)
Investigating agency: AAIB
Confidence Rating: Accident investigation report completed and information captured
Leonardo (Agusta Westland) AW189 G-MCGV sustained minor damage when a heating duct failed in flight releasing fragments of duct insulation material into the cabin and cockpit, causing respiratory irritation to the occupants. The aircraft landed safely.

=History of the flight=
Following completion of a SAR training sortie involving winching operations, the cabin and cockpit heating was selected on for the return transit to the helicopter’s base at Lydd. Approximately 6 nm from Lydd, the rear crew seated in the cabin alerted the flight crew to the presence of ‘fibres floating in the air’ which were causing respiratory irritation.

The flight crew selected the heating and ventilation system to off and donned PPE face masks, which were carried in the cockpit. Given the proximity to Lydd, the commander elected to expedite the approach and perform a running landing. During the approach the non-flying pilot experienced some mild respiratory irritation, but the commander who was pilot-flying reported that he was not noticeably affected.

Upon landing, the cabin doors and storm windows were opened for ventilation and to clear the contamination. Subsequent examination showed that the aft heating duct had failed, allowing duct insulation material to be drawn into the heating and ventilation system"

=Damage to airframe=
Collapsed heating duct, contamination of cockpit and cabin by insulation particles.

=AAIB Conclusion=
The heating duct on G-MCGV failed despite having been subject to a service bulletin intended to improve the installation of the duct. As a result of this and previous duct failures, the duct is being redesigned to strengthen the bonded joints between the flexible and rigid portions of the duct. In the interim, the aircraft installation of the existing duct configuration will also be modified to improve the routing and restraint of the duct, thereby reducing the loading on the duct joints.

Accident investigation:
Investigating agency: AAIB
Report number: AAIB-27957
Status: Investigation completed
Download report: Final report


1. AAIB Final Report:
2. AAIB Annual Safety Review 2023 p.22:



G-MCGV AgustaWestland AW189 HM Coastguard (Lydd) Bristow Helecopters Lydd 26.6.19 G-MCGV AgustaWestland AW189 HM Coastguard at Lydd (London Ashford) Airport, Romney Marsh, Kent 26.6.2019

Revision history:

29-Mar-2024 17:49 Dr. John Smith Added
29-Mar-2024 17:50 ASN Updated [Narrative, Accident report]

Corrections or additions? ... Edit this accident description

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