https://www.atsb.gov.au/media/news-i...minary-report/
A well written ATSB preliminary report on the Cessna 404 Titan accident at Lockhart River 17 March 2020.
Included in the report was a photo of the instrument panel layout for that aircraft. Applicable rules require IFR charter category aircraft to have two artificial horizons. It is a given that they both must be viewable from the command seat without undue effort.
If the pilot's AH became inoperative in IMC while the aircraft was being crewed single pilot, it would be most difficult, particularly at night. to fly on the second AH, which in this aircraft is installed on the extreme right hand end of the instrument panel and well out of the normal eye scan of the pilot in the left seat.
The parallax error alone, let alone night instrument lighting, would make it impractical for the pilot flying from the left seat to consistently fly within current instrument rating tolerances.
This problem has been known by CASA ever since the installation of a second AH for IFR charter operations was mandated over 50 years ago. The problem has been conveniently ignored since then.
While the subject has no bearing on this specific accident, ATSB could do a power of good if they mention in their Final Report the incongruity of the positioning of the second artificial horizon in other GA types where fitment is mandatory.