Delays had resulted primarily from difficulties with hypergolic loading and contamination problems, but propellant loading had been completed several days earlier. Target for the countdown demonstration test was January 19. At Buffalo, N.Y., the NASA stability team assisted Bell Aerospace Co. in tackling the LM ascent engine instability problem. Post-test analysis of the qualification engine had revealed gouging of the chamber wall near the injector face. Bell engineers were assessing the amount of requalification testing that would be required and continued their testing on reworked engines, seeking to find the cause of previous engine instabilities. Meanwhile, the backup injector program at Rocketdyne Division was proceeding extremely well. Tests employing fuel film cooling had produced increased engine performance within acceptable chamber erosion limits. Altitude tests were scheduled to follow within a few weeks.