Q
IRS:
Agreed to all your tchnical details. The airlines in question never does quick aligning of irs, Boeing taught them to do only full align. Therefore slim chance of crew inadvertently leaving irs in align mode. The 757 of RNAC has no gps backup.
RDMI:
Yes, manual tuning of vor NO 1 gives needle pointing to the staion but without HDG information, since heading info is derived from irs.They do not practice std by (only) instrument approach during PC.Besides, it is a VOR/DME 15mile arc approach for RWY 02 in KTM.
Yes, Auto brake does not function without A/S of Normal brake (R-sys). However, A/S functions normaly on ALT Brake (L-sys) and also RSV Brakes.