see AAD Vol 27:ICAO Circular 178-AN/111 pgs 95 - 150
Request from Eff Oh: "... I'm after is the full, official report...."
Lockheed L-1011 Tristar, HZ-AHK, accident at Riyadh,
Saudi Arabia, on 19 August 1980.
Report dated 16 January 1982,
released by the Presidency of Civil Aviation, Saudi Arabia.
This report is included in Aircraft Accident Digest [a number of photos, figures and appendices were not reproduced]. You should be able to locate the AAD Vol27 at a local engineering library:
ICAO Circular 178-AN/111, "Aircraft Accident Digest 1980" vol #27; pgs95-150. This AAD version does include many charts and drawings, and appears to be a full text version of the AAR.
Also see Nato AGARD CP#467 "Aircraft Fire Safety," pg 1-3, detailed technical analysis of fire, fire suffocation, cargo-liner hole, fire spread.
See also DG's"AD", pg 163-5. SB's"FC", pg 132-5.]
Before the advent of the web-internet, when I needed an AAR from elsewhere, I was often told to contact my country's investigating authority for distribution. Maybe AAIB would be your provider (??) of that AAR on Saudia163/19Aug80?