FAA Federal Aviation Regulations (FARS, 14 CFR)

(a) The flap extended speed VFE must be established so that it is --

(1) Not less than the minimum value of VF allowed in §23.345(b); and

(2) Not more than VF established under §23.345(a), (c), and (d).

(i) VF established under §23.345; or

(ii) VF established under §23.457.

(b) Additional combinations of flap setting, airspeed, and engine power may be established if the structure has been proven for the corresponding design conditions.

[Doc. No. 4080, 29 FR 17955, Dec. 18, 1964; 30 FR 258, Jan. 9, 1965, as amended by Amdt. 23-50, 61 FR 5192, Feb. 9, 1996]