Photo of a Chinook downed by an RPG while recovering a Cobra Helicopter. The FE was killed and the rest of the crew were hit by groundfire while exiting or outside the aircraft. The aircraft was hit while departing from a hostile LZ with the underslung Cobra...and was beginning to climb when hit.
The RPG killed the Port side engine, severed fuel lines, and wiring harnesses in the area of the engine after punching a hole through the fuel cell on the starboard side of the aircraft. At least one of the main transmissions lost all luubrication fluid.
Fortunately there wasn't anything solid enough to slow the round and the explosive charge went off after it had penetrated the starboard side of the aircraft (It was assumed.....) and there was only a flash fire. The aircraft was recovered by a CH-54 later and was sent back to the factory for rebuild. It is very likely it wound up being a "D" model and could still be flying today.