LMI2933 seems to have been holding at GEMLI prior to a planned RNAV approach, indeed!. They started down under power. Last ADS-B report was at 15,500 feet near GEMLI, over 3,000 feet above the final approach. It appears they had extended gear and flaps in anticipation of continued flight worthiness. They crossed through the final glide-path at about 10,500 feet about 3 nm south of the FAP (KUNGU) at 9,700 feet and crashed near the RNG VOR. With the loss of power is the loss of RNAV (EFIS, FMS). The crew would have the option to use ILS, LOC, or VOR radio navigation tuned manually, and make mention of LOC.
The crew's actions while under power on their final descent seem reasonable if assuming that they don't flameout.
In hindsight, with the Feed tanks on fumes, the crew may have had an option to descend flaps up gear up. Once they configured for landing and by diving to capture the glide path, they lost any option to make it. There is no option to raise flaps and gear once all power is lost.
Revised my blog to reflect the RNAV approach, thanks for the help.
Satcom Guru: LMI2933 LAMIA AVRO RJ85 Medellín Deadstick