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•suspect: O- ring seals. "blow-by" has been seen on other launches (black smoke = grease, white may indicate ice). At "joint rotation" (~20°) O rings should seal in

•there may be a close-out photo showing O-ring twisted.

*MSFC person: JACK LEE

A2 (phone - KSC)

•O-rings: after compression, rebound time depends on T.... 10 min. @ 50°

•found ET shaped change (range safety) unfried

•photo: SRB tore tank at attach pt