Images below are (1) Items 1-10 from the 1973 list of Incidents and accidents reported in Utah, and (2) example of the detail data available for each listing. Overall this data base includes close to 400 entries (not 55 or 56), for incidents and accidents reported in Utah from 1973 through 1979. (Note the image header on the first screenshot.) A few of these reports are repeats. The NTSB version of this list is comprised of essentially the same entries for the years 1973 to 1979.Res Ipsa wrote: ↑Sat Apr 10, 2021 4:48 amThe problem is what is in the databases. The databases themselves tell us what is in them.
FAA Accident and Incident Database (AIDS): no records of accident or incidents before 1978.
NTSB Accident database: no images of original records during the decade of the 1970s. NTSB personnel prepared summaries of final reports (all include probable cause determinations) of all accidents and "selected incidents." A search of all records from Utah during the entire decade generates 55 or 56 accidents and only a single incident -- an incapacitated pilot on a commercial passenger jet. Given the disparity between the number of accidents and the number of "selected incidents," as well as the nature of the single incident (commercial passenger jet), there is no basis for assuming that database is complete enough to draw conclusions from the absence of a record for some other incident.
If any aircraft sustained an engine fire that was limited to the engine, followed by a safe landing with no injuries (just like the example you posted upthread) at any time during the 1970s, we could not find it in either database because neither includes all incidents for that time period.
Upthread I offered to copy these and post them as a favor to RI. He did not seem interested. After again seeing RI's claim regarding unavailability of these records before 1978, I thought it best to post at least two screenshots from several days ago.
Each report allows access to the details, by clicking on the Details, as shown in the second screenshot below. These records were scraped and digitized and are available on the internet from 1973 on. The only Navajo (PA31) incident I saw anywhere near Cedar City was for a minor incident on the ground. It did not occur in 1976.
As can be seen below, these reports cover minor incidents as well as accidents. There were very roughly 40 per year in Utah and the numbers of reports seemed pretty consistent year to year from 1973 through 1979.