Section 25.1461

14 CFR Ch. I (1-1-19 Edition)

(1) Be either bright orange or bright
yellow;
(2) Have reflective tape affixed to its
external surface to facilitate its location under water; and
(3) Have an underwater locating device, when required by the operating
rules of this chapter, on or adjacent to
the container which is secured in such
a manner that they are not likely to be
separated during crash impact.
(e) Any novel or unique design or
operational characteristics of the aircraft shall be evaluated to determine if
any dedicated parameters must be recorded on flight recorders in addition
to or in place of existing requirements.
[Amdt. 25-8, 31 FR 127, Jan. 6, 1966, as amended by Amdt. 25-25, 35 FR 13192, Aug. 19, 1970;
Amdt. 25-37, 40 FR 2577, Jan. 14, 1975; Amdt.
25-41, 42 FR 36971, July 18, 1977; Amdt. 25-65,
53 FR 26144, July 11, 1988; Amdt. 25-124, 73 FR
12563, Mar. 7, 2008; 74 FR 32800, July 9, 2009]

spaschal on DSK3GDR082PROD with CFR

Section 25.1461 Equipment containing high
energy rotors.
(a) Equipment containing high energy rotors must meet paragraph (b),
(c), or (d) of this section.
(b) High energy rotors contained in
equipment must be able to withstand
damage caused by malfunctions, vibration, abnormal speeds, and abnormal
temperatures. In addition - 
(1) Auxiliary rotor cases must be able
to contain damage caused by the failure of high energy rotor blades; and
(2) Equipment control devices, systems, and instrumentation must reasonably ensure that no operating limitations affecting the integrity of high
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 affect continued safe flight.
[Amdt. 25-41, 42 FR 36971, July 18, 1977]

Subpart G - Operating Limitations
and Information
Section 25.1501

General.

(a) Each operating limitation specified in SectionSection 25.1503 through 25.1533 and
other limitations and information necessary for safe operation must be established.
(b) The operating limitations and
other information necessary for safe
operation must be made available to
the crewmembers as prescribed in
SectionSection 25.1541 through 25.1587.
[Amdt. 25-42, 43 FR 2323, Jan. 16, 1978]

OPERATING LIMITATIONS
Section 25.1503

Airspeed limitations: general.

When airspeed limitations are a function of weight, weight distribution, altitude, or Mach number, limitations
corresponding to each critical combination of these factors must be established.
Section 25.1505 Maximum
speed.

operating

The maximum operating limit speed
(VMO/MMO airspeed or Mach Number,
whichever is critical at a particular altitude) is a speed that may not be deliberately exceeded in any regime of
flight (climb, cruise, or descent), unless
a higher speed is authorized for flight
test or pilot training operations. VMO/
MMO must be established so that it is
not greater than the design cruising
speed VC and so that it is sufficiently
below VD/MD or VDF/MDF, to make it
highly improbable that the latter
speeds will be inadvertently exceeded
in operations. The speed margin between VMO/MMO and VD/MD or VDFM/DF
may not be less than that determined
under Section 25.335(b) or found necessary during the flight tests conducted under
Section 25.253.
[Amdt. 25-23, 35 FR 5680, Apr. 8, 1970]

Section 25.1507

Maneuvering speed.

The maneuvering speed must be established so that it does not exceed the
design maneuvering speed VA determined under Section 25.335(c).

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