Casualties unknown

2021-11-17: F-35B Lightning (ZM152) — RAF — GB

GB

On November 17, 2021, a F-35B Lightning (registration ZM152) operated by RAF was involved in an aviation accident near GB. Investigators recorded the probable cause as: 1.4.227. Causal factor. Based on all the evidence, the panel concluded that the left intake blank was at the front face of the engine compressor during the aircraft launch and determined this to be the causal factor. This summary draws on records from the UK Defence Safety Authority / Military Aviation Authority (Service Inquiries); 8 related events involving the same aircraft type or operator are linked below.

Sourcesthe UK Defence Safety Authority / Military Aviation Authority (Service Inquiries)Primary reportUpdated 1781090489Data APIEditorial standards

The UK Defence Safety Authority convened a Service Inquiry on 2 December 2021 to investigate the loss of F-35B Lightning ZM152 (BK-18) from 617 Squadron RAF, embarked on HMS Queen Elizabeth on 17 November 2021.

Background

On 17 November 2021, F-35B Lightning ZM152 (BK-18) assigned to 617 Squadron Royal Air Force was embarked on HMS Queen Elizabeth. The aircraft was subsequently lost. The exact circumstances were not detailed in the initial convening documentation.

Inquiry Establishment

In accordance with Section 343 of the Armed Forces Act 2006 and Joint Service Publication 832, the Director General of the Defence Safety Authority (DG DSA) convened a Service Inquiry (SI) on 2 December 2021 to investigate the loss. The inquiry panel assembled at MOD Boscombe Down for administrative briefing and was formally convened by the DG DSA at 1500 hours that day.

The SI panel comprised a President, two Members, a Legal Advisor, and technical investigation support provided by the Defence Accident Investigation Branch (DAIB). A mentor from DAIB was also assigned. The panel underwent induction training at the DAIB facility immediately after convening and subsequently established working accommodation.

Terms of Reference

The terms of reference required the SI to investigate and report on the facts related to the loss, recording all evidence and expressing opinions as directed. The inquiry was to make recommendations to prevent recurrence. An initial report on the investigation's commencement was due by 24 January 2022.

Observations

The convening order noted that attendance at the SI was limited to DAIB personnel, human factors specialists, and other specified advisors. The costs of the inquiry were to be borne by the DG DSA. The inquiry continued with a change in panel presidency in January 2022, as documented in the record of changes.