TRANSIT AUTHORITY OMITTED A FINDING ON 1977 IND CRASH
NYC Transit Authority officials reportedly knew, but failed to report to Federal Government, that equipment failure on R-46 subway cars was ‘contributing cause’ in '77 IND accident in which 20 people were injured; original report cited human failure as sole cause, but authority, within 24 hours of accident, reportedly disconnected special automatic equipment whose failure contributed to collision; discrepancy between official report and report by senior executive officer John G deRoos to Metropolitan Transportation Authority chairman Harold L Fisher was uncovered by Manhattan Boro Pres Andrew J Stein; illus (M)

