STS-51 Patch

Company

NASA

Price

$6.95

Source

Official Store

STS-51 Patch Launch Highlights Officials decided to scrub Discovery’s mission Saturday, July 17, at about 8:52 a.m. EDT because all eight of the solid rocket booster hold down bolts and the T-0 liquid hydrogen vent arm, located on the side of the external tank, were prematurely charged with current. This charge is normally initiated at the T-18 second mark in the countdown. The problem circuit card in the pyrotechnic initiator controller (PIC) which caused the launch scrub on Saturday has been replaced on the mobile launcher platform. Efforts to duplicate the problem on the suspect card were…