Other 581st combat operations in Korea included a special H-19 Chickasaw Helicopter Flight co-located and blended in with elements of the 2157th Air Rescue Squadron at Kimpo Airport (K-14).
In one six-month period of operations, the H-19s logged over 1,100 hours of combat flying in over 300 intelligence and rescue missions.
 Parked alongside the ARS H-19 helicopters the "Rescue" markings had been painted over with the words "Air Resupply".
However, these helicopters had a very different mission than air rescue.
 The 581st Air Resupply Squadron Helicopter Flight didn't get their operations orders from the 581st Wing, or even from Fifth Air Force.
The Air Commandos of the 581st Helicopter Flight received their missions from U.S. Far East Command's "Liaison Detachment", a battle group of the United Nations "Combined Command for Reconnaissance Activities, Korea".

The helicopter Flight flew blacked-out, single-ship night low-level insertions of United Nations agents and sabotage teams behind North Korean lines.
  On occasion, the helicopters would augment the 2157th Air Rescue Squadron as a secondary mission.
 Virtually all night insertion missions began with one of the Flight's helicopters departing at night from Cho-do Island (K-54) a bleak rock located ten miles from the Korean coast, sixty miles north of the 38th Parallel.
 The island's proximity to the peninsula's coastline and mudflats provided an ideal base to conduct night special operations missions.
  The Flight would proceed from K-14 to Cho-do and pick up the agents.
 After a final briefing, the H-19s flew out over the sea at wave-top level to avoid North Korean radars.

As the Air Rescue service did not fly night rescue missions, the North Koreans soon learned that the sound of a helicopter at night meant only one thing: an agent insertion or extraction mission was in progress.
To lower the sound of the helicopters, the aircrews of the H-19s kept the engine exhaust stack on the left side of the helicopter away from the coastline as much as possible.
The crews could only hope that North Koreans weren't waiting in ambush for them.
 As dangerous as these missions were, the Air Commandos at least had the element of surprise and the safety of darkness on their side.

Two Air Commando H-19 pilots received the Silver Star and Distinguished Flying Crosses from an attempted rescue mission described in their citations as "the deepest helicopter penetration of the Korean War".
  Taking off from Cho-do Island in the early morning hours, Captain Frank J. Westerman and Lieutenant Robert Sullivan flew low-level through darkness for two hours, guided north by an Air Rescue SA-16 pathfinder aircraft flying overhead at an altitude of 100 feet.
  At first light, the helicopter was 16 miles south of the Chinese border and within ten minutes flying time of the Chinese MiG fighter base at Antung, the largest Chinese fighter base in North Korea.
 Racing inland they discovered the valley the downed pilot was reported to be in, which turned out to be a massive camouflage supply and troop depot.
The valley contained at least a regiment of troops, all armed and firing as fast as they could.
 The hills looked like a large warehouse, piles of equipment and supplies under camouflage nets.
  It was quickly evident that no evading American was walking around in the area.
 The Air Commandos fled for their lives, informing the SA-16 offshore to do the same.
  It was likely that the rescue attempt was bait for a Chinese trap.
All of the Air Commandos returned to Cho-do successfully.
Other 581st combat operations in Korea included a special H-19 Chickasaw Helicopter Flight co-located and blended in with elements of the 2157th Air Rescue Squadron at Kimpo Airport (K-14). In one six-month period of operations, the H-19s logged over 1,100 hours of combat flying in over 300 intelligence and rescue missions.  Parked alongside the ARS H-19 helicopters the "Rescue" markings had been painted over with the words "Air Resupply". However, these helicopters had a very different mission than air rescue.  The 581st Air Resupply Squadron Helicopter Flight didn't get their operations orders from the 581st Wing, or even from Fifth Air Force. The Air Commandos of the 581st Helicopter Flight received their missions from U.S. Far East Command's "Liaison Detachment", a battle group of the United Nations "Combined Command for Reconnaissance Activities, Korea".
The helicopter Flight flew blacked-out, single-ship night low-level insertions of United Nations agents and sabotage teams behind North Korean lines.   On occasion, the helicopters would augment the 2157th Air Rescue Squadron as a secondary mission.  Virtually all night insertion missions began with one of the Flight's helicopters departing at night from Cho-do Island (K-54) a bleak rock located ten miles from the Korean coast, sixty miles north of the 38th Parallel.  The island's proximity to the peninsula's coastline and mudflats provided an ideal base to conduct night special operations missions.   The Flight would proceed from K-14 to Cho-do and pick up the agents.  After a final briefing, the H-19s flew out over the sea at wave-top level to avoid North Korean radars.
As the Air Rescue service did not fly night rescue missions, the North Koreans soon learned that the sound of a helicopter at night meant only one thing: an agent insertion or extraction mission was in progress. To lower the sound of the helicopters, the aircrews of the H-19s kept the engine exhaust stack on the left side of the helicopter away from the coastline as much as possible. The crews could only hope that North Koreans weren't waiting in ambush for them.  As dangerous as these missions were, the Air Commandos at least had the element of surprise and the safety of darkness on their side.
Two Air Commando H-19 pilots received the Silver Star and Distinguished Flying Crosses from an attempted rescue mission described in their citations as "the deepest helicopter penetration of the Korean War".   Taking off from Cho-do Island in the early morning hours, Captain Frank J. Westerman and Lieutenant Robert Sullivan flew low-level through darkness for two hours, guided north by an Air Rescue SA-16 pathfinder aircraft flying overhead at an altitude of 100 feet.   At first light, the helicopter was 16 miles south of the Chinese border and within ten minutes flying time of the Chinese MiG fighter base at Antung, the largest Chinese fighter base in North Korea.  Racing inland they discovered the valley the downed pilot was reported to be in, which turned out to be a massive camouflage supply and troop depot. The valley contained at least a regiment of troops, all armed and firing as fast as they could.  The hills looked like a large warehouse, piles of equipment and supplies under camouflage nets.   It was quickly evident that no evading American was walking around in the area.  The Air Commandos fled for their lives, informing the SA-16 offshore to do the same.   It was likely that the rescue attempt was bait for a Chinese trap. All of the Air Commandos returned to Cho-do successfully.
Air Resupply And Communications Service