14 CFR §27.67

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗

For multiengine helicopters, the steady rate of climb (or descent), at Vy (or at the speed for minimum rate of descent), must be determined with—

(a)Maximum weight;
(b)The critical engine inoperative and the remaining engines at either—
1. (1)Maximum continuous power and, for helicopters for which certification for the use of 30-minute OEI power is requested, at 30-minute OEI power; or
2. (2)Continuous OEI power for helicopters for which certification for the use of continuous OEI power is requested.