The link please?

The document reads that the CH-47D Chinook, call sign Extortion-17, was just about to land to drop off a team of Seals on August 6th. EX-17 was less than a minute from touch down and decending when they came under attack. The tail number for the aircraft was 84-24175.

The location is given as:
N 34° 01' 21.93" E 068° 47' 07.55
which is a populated valley. 2 months previously, another CH-47 had been attacked in this same area by 5-6 RPGs and smalls arms fire.

EX-17 was found to have been hit in the aft rotor blade which resulted in a severe mechanical and dynamic imbalance resulting in loss of control to the aircraft and finalizing in a devastating crash. Fire from the crash consumed more than 80% of the aircraft.

The propeller was believed to have been hit by an OG-7 rocket propelled grenade, which is a standard high explosive round. Testing later concluded that it was most likely an OG-7V grenade which is an anti-personnel warhead. Video footage found that the helicopter had been fired upon by 2-3 RPGs almost simultaneously. Only one grenade from the single volley made contact.

The document goes further into detail along with the probable location of the shooters due west by southwest of the helicopter's location as it was coming in for landing. Also the location of the debris and images of the debris.

Footage of the attack and crash were recorded from an AC-130 Gunship and 2 AH-64 gunships which were in the vicinity for mission support.

Did AC130 and 64 engage the targets? What was their BDA ?

Weird thing is that most of those guys were on Abbottabad mission.