Substitute GPS for out of service VOR enroute and terminal phases
Asked by: Craig 3420 views FAA Regulations
Regarding a TSO C-129 RNAV system…. Let’s assume the RAIM check, database, AFM, etc. are ok with it and the aircraft has the navigation equipment suitable for the route to be flown (i.e. has a functioning VOR receiver). For enroute and terminal operations (other than the final approach segment) both AC 90-108 1(a)(1) and AIM 1-2-3 (a)(1) allow the use of a “suitable” RNAV system as a substitute for an out of service ground based navaid (VOR,DME, etc). In part 6 of AC 90-108 and in AIM 1-2-3 (b)(1), a TSO-129 RNAV system is included in the definition of a suitable RNAV system. I interpret this to imply that, if a VOR is out of service, I could still fly a victor airway route using a suitable TSO-129 RNAV system. This seems to conflict with AIM 1-1-17 (3)(b)…….or am I not understanding something? “When using TSO-C129() or TSO-C196() receivers, the avionics necessary to receive all of the ground−based facilities appropriate for the route to the destination airport and any required alternate airport must be installed and operational. Ground−based facilities necessary for these routes must be operational. Thanks, Craig
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