Definition
An FAA-issued Management Specification authorization, identified by paragraph code C073, that permits a Part 91K, 121, 125, or 135 operator to use an approved Enhanced Flight Vision System (EFVS) to descend below the published Decision Altitude, Decision Height, or Minimum Descent Altitude on an instrument approach, down to 100 feet above the touchdown zone elevation, without the natural-vision visibility references that would otherwise be required at minimums.
Plain English
It is the official FAA permission slip an operator must hold before its pilots are allowed to use an Enhanced Flight Vision System to continue an instrument approach below normal minimums. Without this authorization on file, the EFVS cannot be used that way, even if the airplane has the equipment installed.
Context Anchor
Seen in EFVS discussions, especially where the FAA handbook explains which operators need specific FAA authorization before using EFVS below certain approach minimums.
Derivation
MSpec stands for Management Specifications, the set of FAA-issued authorizations that govern how a specific operator may conduct certain operations. Each paragraph in that document has a code; C073 is the paragraph that deals specifically with EFVS operations to touchdown and rollout, or to 100 feet above the touchdown zone. The code itself has no meaning beyond being the FAA's filing label for that authorization.
Why Pilots Care
Determines whether an operator is legally permitted to use EFVS to reduce visibility minimums on approaches.
Intuition Check
MSpec MC073 is not a piece of cockpit equipment or an approach procedure. It is an FAA authorization paragraph that permits certain EFVS operations only under stated conditions.
Example Sentence 1
Before dispatching the flight, the chief pilot confirmed the company held MSpec MC073, which allowed the crew to plan an EFVS approach to 100 feet above the touchdown zone.
Example Sentence 2
Compliance with every limitation in MSpec MC073 is required to use the EFVS authorization.