@bluepilot: that particular model was a 650-15 unlike the KLM jets that were 620-15 a la F70. The KLM jets had AHRS.
That jet had triple IRS: there is no DME / DME updating in that area. Once you leave the Mandalay VOR you are on your own:the Heho NDB is next to useless, in a valley 3600ft above MSL. If you can't do a visual approach the chance of getting in is slim.
The road that runs perpendicular to the runway axis has power lines to the south: it may be an error setting the local QNH.
@bob - there is no LIKE button on here :-)