Looks like a good crew chief or pilot left a thermite grenade or two on the aft transmission/engines!
Hopefully, the responsible parties for much of our other equipment did likewise.
While I mostly flew the CH-53D and a good bit of time in the various UH-1E/L/N models, I did have about 10 hours in Frogs. Very stable hover and they stop on a dime.
Also spent a good bit of time as a grunt riding in the back of Frogs in Vietnam and elsewhere in WestPac.
East or west coast?
Could Taliban compel US-trained Afghans to fly them against insurgents among the Northern Aliance?