Two C-123K aircraft modified in September 1965 under Project
Black Spot.
[8] The Black Spot aircraft were to fit under the "self-contained night attack capability" that was Operation Shed Light's primary focus and
E-Systems of
Greenville, Texas was contracted to complete the modifications. These aircraft featured a variety of new sensors including Low Light Level TV (LLLTV), Forward Looking Infrared (FLIR), and a laser rangefinder.
[9] The aircraft looked radically different visibly from its transport brethren, as the new equipment required lengthening the nose by over 50 inches.
[10] The aircraft also featured an armament system designed to carry BLU-3/B (using the ADU-253/B adapter) or BLU-26/B (using the ADU-272/B adapter)
bomblets, or CBU-68/Bs
cluster bombs.
[11][12] The two aircraft, AF Serial Numbers 54-0691 and 54-0698, were first designated NC-123K in 1968 and then redesignated AC-123K in 1969.
[13] These NC/AC-123Ks were first deployed operationally at
Osan AB,
South Korea between August and October 1968, and flying in support of operations against
North Korean infiltrators approaching by boat. The operations in Korea met with a certain level of success and as a result the NC/AC-123Ks were transferred to South Vietnam in November 1968. The aircraft operated there until January 1969, when they were redeployed to
Ubon RTAB,
Thailand. The two aircraft were then returned to the United States to
Hurlburt Field,
Florida in May 1969, where a second round of training occurred. Four crews attended a ground school in Greenville, Texas and returned to Hurlburt where they flew the aircraft for the first time.
The fate of the aircraft is still unclear. Sources have missions terminating in early July 1970 and the aircraft flying to the
MASDC Yard "boneyard" at
Davis-Monthan AFB, AZ where they were returned to C-123K standard, then returned to South Vietnam still wearing their camouflage and black undersides for transport duty.
[10] However, the official history states that combat operations ceased on 11 May 1969, with no mention of the second deployment.
[8] While the second deployment is mentioned in associated documentation, the only dates are of the arrival in Thailand and there is no information as to when they departed or where their destination was.
[14]