AIM ¶ 4-6-3 — RVSM Approval Procedures
AIM 4-6-3 explains RVSM aircraft/operator approval, 14 CFR 91.180/91.706 authority, TCAS II v7.0, monitoring programs, and FAA approvals databases.
RVSM (Reduced Vertical Separation Minimum) airspace allows 1,000 ft vertical separation between FL290 and FL410. Before flying there, both the aircraft and the operator must be authorized.
- 14 CFR 91.180 governs RVSM operations inside U.S. airspace.
- 14 CFR 91.706 governs RVSM operations outside U.S. airspace.
For domestic flights, operators may use Part 91, Appendix G, Section 9 (no specific approval required). For international RVSM flights, you need a specific approval — OpSpec, MSpec, or LOA — under Section 3 of Appendix G.
Key requirements:
- TCAS II equipped aircraft flown in RVSM airspace must use Version 7.0 or later.
- Operators must participate in an altitude-keeping performance monitoring program (described in AC 91-85) so the FAA can verify in-service performance.
- All RVSM airspace is monitored airspace, but ATC does not check approvals databases before issuing clearances — program managers audit usage afterward.
For U.S. operators with specific authority, the FAA Technical Center maintains the U.S. Operator/Aircraft RVSM Approvals database, viewable on the FAA RVSM website.
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?