Space Shuttle Columbia heat shield tile tracer pattern
This is a tracer pattern created for the crew hatch window peripheral tiles on the Space Shuttle Orbiter Vehicle Columbia (OV-102).
The reason for the looseness was an interference between a filler sleeve installed beneath the tiles and the tile
strain isolator pad, which serves as the tile's bond.
Tracer pattern T2A1784 was fabricated as a part-not-included (PNI) "splash" pattern on October 11, 1990.
This urethane foam tracer pattern was routed to a manufacturing facility on parts and material request
(PMR) 402488 on the following day.