AIM ¶ 4-6-10 — Non-RVSM Accommodation
AIM 4-6-10 explains how non-RVSM aircraft can access RVSM airspace, eligible categories, pilot calls, and 2,000-foot vertical separation rules.
RVSM (Reduced Vertical Separation Minimums) airspace normally requires aircraft and operators to be RVSM-authorized. AIM 4-6-10 explains the limited exceptions under which the FAA may accommodate a non-RVSM aircraft in RVSM airspace, per 14 CFR 91.180 and Part 91, Appendix G.
Key points:
- Non-RVSM flights are handled on a workload-permitting basis.
- ATC must apply 2,000 feet vertical separation between non-RVSM aircraft and all other traffic (vs. the standard 1,000 ft in RVSM).
- Pilots must inform ATC of the lack of RVSM approval using phraseology from AIM 4-6-8.
Categories that may be accommodated (with operational transponder):
- DoD aircraft
- Certification/development flights
- Active MEDEVAC air ambulance flights
- Aircraft climbing/descending through RVSM levels without intermediate level-off (see AIM 4-6-11)
- Foreign State (government) aircraft
Access methods: an LOA/MOU with the RVSM facility, or File-and-Fly via flight plan. RVSM-compliant aircraft get priority, then File-and-Fly. This is operational FAA policy, not a way to bypass RVSM approval.
Five FAA-written-style questions. Instant explanations, every answer cites its source — no account needed.
You are flying VFR in Class E airspace at 8,500 feet MSL during the day. What are your minimum visibility and cloud clearance requirements?