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AWAITING INVESTIGATORVERIFIED2025-12-28ACCREDITED INVESTIGATOR NEEDEDACTIVE MONITORING

Follow-up reporting and official statements are still being collected.

Beagle B121 Series 2, G-AZDG, steep descent into Hanningfield Reservoir

Aircraft:
Beagle B121 Series 2
Operator:
not established
Registration:
G-AZDG
Location:
Hanningfield Reservoir, Essex, United Kingdom
Occurrence type:
accident
Severity:
not established
Investigation authority:
Not yet identified
Last verified:
2026-10-01 18:11Z

Carried by an official investigation authority or regulator. Highest source tier held: Official authority. 1 source attached.

CASE WATCH — SeyAero has prepared a computational workspace for this occurrence from open sources. This is not an investigation and contains no finding. The formal safety investigation is the responsibility of the State authority under ICAO Annex 13.

What is known

An AAIB investigation is underway into a Beagle B121 Series 2, registration G-AZDG. The aircraft was involved in a steep descent into Hanningfield Reservoir in Essex. The occurrence took place on 28 December 2025.

What is not yet known

  • · What was the flight path prior to the steep descent?
  • · What were the weather conditions at the time?
  • · What was the operational status of the aircraft prior to the occurrence?

Evidence likely to be relevant

Flight data

  • · Flight data recorder or QAR supporting
  • · Track data (ADS-B, radar) supporting

Voice

  • · Cockpit voice recorder supporting
  • · ATC recordings and transcript supporting

Environment

  • · Weather observations and forecasts supporting
  • · Drift and current modelling supporting
  • · Acoustic observations supporting

Aircraft

  • · Maintenance and technical logs important
  • · Components and exhibits supporting

Human factors

  • · Crew records, duty and training important

External evidence

  • · Photographs, video and imagery supporting
  • · Witness and ground reports supporting

Site and recovery

  • · Wreckage distribution and site survey critical

Sources

Source timeline

  • 2026-10-01 18:11Z · Verification state moved to VERIFIED. Carried by an official investigation authority or regulator.
  • 2026-10-01 18:11Z · Case Watch opened from open-source reporting. Awaiting an investigator.

Investigation workspace

This file is prepared and unclaimed. Claiming it opens a private SeyAero workspace with the evidence plan, the sources and the timeline already in place.

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NEW AVIATION OCCURRENCE

SeyAero has opened a Case Watch for Beagle B121 Series 2, G-AZDG, steep descent into Hanningfield Reservoir.
Beagle B121 Series 2 · Hanningfield Reservoir, Essex, United Kingdom
Verification: VERIFIED · Sources: 1
Investigation authority: not yet identified

Evidence plan prepared. Available for investigator claim.

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