At 07:00 hours Houston time, Skylab 2 roared off its Milk Stool from LC-39B; the first Saturn IB launch in almost five years and only the second launch from Pad 39B.
Nasa concluded that the failure of the micrometeoroid shield 63 seconds into the flight caused the breaking of the solar array system. Furthermore, at 593 seconds into the flight the second stage retro rocket plume exhaust resulted in the ripping off of the array.
Having two rockets stacked on pads 39A and 39B at the same time made for quite a sight at the Kennedy Space Center. There were also two firing rooms at KSC’s Launch Control Center that would control the countdowns for both rockets simultaneously.