Text in force at CS29-12: from CS29-0, effective 14 Nov 2003.
(a) The perform ance prescribed in this subpart must be determined:
(1) With normal piloting skill; and
(2) Without except ionally favourabl e conditions.
(b) Compliance with th e p erformance requirements of this subpart must be shown:
(1) For still air at sea-lev el with a standard atmosphere; and
(2) For t he approved range of atmospheric variables.
(c) The available power m ust correspond t o engine power, not exceeding the approved power, less:
(1) Installation losses; and
(2) The power absorbed by the accessories and services at the values for which certification is requested and approved.
(d) For reci procating engi ne-powered rotorcraft, the perform ance, as affected by engine power, m ust be based on a rel ative hum idity of 80% in a standard atmosphere.
(e) For turbine engine-powered rotorcraft, the performance, as affected by engine power, must be based on a relative humidity of:
(1) 80%, at and bel ow standard temperature; and
(2) 34%, at and above st andard temperature plus 28°C (50°F). Between th ese two tem peratures, the relative humidity must vary linearly.
(f) For turbine-engine-powered rotorcraft, a means m ust be provi ded t o perm it t he pi lot to determine prior to take-off that each engine is capable of developing t he power necessary t o achieve the applicable rotorcraft perform ance prescribed in this subpart.
ED Decision 2003/016/RM · Source