(1)
Auxiliary rotor cases must be able to contain damage caused by the failure of high energy rotorblades; and

(2)
Equipment controldevices,systems,andinstrumentationmust reasonably en-surethat no operatinglimitations a.ecting theintegrity ofhigh energy rotors will be exceeded in service.

(c)
It must be shown by test that equipment containing high energy rotors can contain any failure of a high energy rotor that occurs at the highest speed obtainable with the normal speed control devices inoperative.

(d)
Equipment containing high energy rotors must be located where rotor failure will neither endanger the occupants nor adversely a.ect continued safe .ight.]

Amdt. 27-2, E.. 2/25/68
Chapitre 67
Subpart G : Operating Limitations and Information
Sommaire
67.1OperatingLimitations. . . . . . . . . . . . . . . . . . . . . . . 886 FAR27.1501:General . . . . . . . . . . . . . . . . . . . . . . 886 FAR 27.1503 : Airspeed limitations : general . . . . . . . . . 886 FAR27.1505:Never-exceed speed . . . . . . . . . . . . . . . 886 FAR27.1509:Rotorspeed ................... 887 FAR 27.1519 : Weight and center of gravity . . . . . . . . . . 887 FAR 27.1521 : Powerplant limitations . . . . . . . . . . . . . 887 FAR27.1523:Minimum.ightcrew . . . . . . . . . . . . . . 889 FAR27.1525:Kindsof operation. . . . . . . . . . . . . . . . 889 FAR27.1527:[Maximumoperating altitude.] . . . . . . . . . 890 FAR27.1529:[InstructionsforContinuedAirworthiness.] . . 890
67.2MarkingsandPlacards ...................... 890 FAR27.1541:General . . . . . . . . . . . . . . . . . . . . . . 890 FAR 27.1543 : Instrument markings : general . . . . . . . . . 890 FAR27.1545:Airspeedindicator . . . . . . . . . . . . . . . . 890 FAR 27.1547 : Magnetic direction indicator . . . . . . . . . . 891 FAR 27.1549 : Powerplant instruments . . . . . . . . . . . . . 891 FAR27.1551:Oilquantity indicator . . . . . . . . . . . . . . 891 FAR27.1553:Fuelquantity indicator . . . . . . . . . . . . . 891 FAR27.1555:Control markings . . . . . . . . . . . . . . . . 891 FAR 27.1557 : Miscellaneous markings and placards . . . . . 892 FAR27.1559:Limitationsplacard . . . . . . . . . . . . . . . 893 FAR27.1561:Safety equipment . . . . . . . . . . . . . . . . 893 FAR27.1565:Tail rotor. . . . . . . . . . . . . . . . . . . . . 893
67.3 Rotorcraft Flight Manual and Approved Manual Material . 893 FAR27.1581:General . . . . . . . . . . . . . . . . . . . . . . 893 FAR27.1583:Operatinglimitations . . . . . . . . . . . . . . 893 FAR27.1585:OperatingProcedures . . . . . . . . . . . . . . 894 FAR 27.1587 : Performance information . . . . . . . . . . . . 895 FAR27.1589:Loadinginformation. . . . . . . . . . . . . . . 895
885
Subpart G : Operating Limitations and Information
67.1 Operating Limitations
FAR 27.1501 : General
(a)
[Each operating limitation speci.ed in Secs. 27.1503 through 27.1525 and other li-mitations and information necessary for safe operation, must be established.

(b)
The operatinglimitations andotherinformation necessaryfor safe operation mustbe made availableto the crewmembers asprescribedinSecs.27.1541through27.1589.]

Amdt. 27-14, E.. 3/1/78
FAR 27.1503 : Airspeed limitations : general
(a)
An operating speed range must be established.

(b)
When airspeed limitations are a function of weight, weight distribution, altitude, rotor speed, power, or other factors, airspeed limitations corresponding with the critical combinations of these factors must be established.

FAR 27.1505 : Never-exceed speed

(a)
The never-exceed speed, VNE, must be established so that it is–

(1)
Notlessthan40knots(CAS); and

(2)
Not more than the lesser of–

(i)
[0.9times the maximum forward speeds established under Sec. 27.309;

(ii)
0.9 times the maximum speed shown under Secs. 27.251 and 27.629; or
　
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