Contemporaneous deposit of correspondence sent on 17 May 2026 by Gareth O'Brien BE (Civil) MSc, on behalf of the North Runway Technical Group, to the Minister for Transport of Ireland (Mr Darragh O'Brien TD), the Secretary General of the Department of Transport (Mr Ken Spratt), and the Assistant Secretary General for Aviation, Director General of Civil Aviation, and Ireland's Member of the EASA Management Board (Ms Ethna Brogan), placing each of them on personal notice of the structural absence of any body holding the cumulative safety case for the Runway 28R Standard Instrument Departure at Dublin Airport. The letter was copied to the Chief Executive of the Irish Aviation Authority (Mr Declan Fitzpatrick), the Air Accident Investigation Unit, and the European Union Aviation Safety Agency (Confidential Safety Report file #4851). The deposit comprises: (1) the letter source in Markdown; (2) the letter as sent, in RFC 822 .eml format with full SMTP headers; (3) Enclosure 1, the 19 April 2026 letter from G. O'Brien to D. Fitzpatrick (PDF); (4) Enclosure 2, Mr Fitzpatrick's 6 May 2026 acknowledgement (.eml with IAA DKIM signature); and (5) a delivery confirmation from the Minister's Office (.eml with auto-reply dated 17 May 2026 13:26 UTC). The deposit supplements O'Brien (2026c), Structural Secrecy in Irish Aviation Regulation: From Rescue 116 to the North Runway, DOI 10.5281/zenodo.19629012, in which the cumulative analytical framework is set out in full. The reference NRTG/2026/001 is the North Runway Technical Group's internal identifier for this notice.
Gareth Daniel O'Brien (2026) studied this question.