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14 CFR Ch. I (1–1–19 Edition)

§ 27.1523

The use of 2-minute OEI power must be
limited to not more than 2 minutes for
any period in which that power is used,
and by—

(1) The maximum rotational speed,

which may not be greater than—

(i) The maximum value determined

by the rotor design; or

(ii) The maximum value dem-

onstrated during the type tests;

(2) The maximum allowable gas tem-

perature; and

(3) The maximum allowable torque.

(Secs. 313(a), 601, 603, 604, and 605 of the Fed-
eral Aviation Act of 1958 (49 U.S.C. 1354(a),
1421, 1423, 1424, and 1425); and sec. 6(c) of the
Dept. of Transportation Act (49 U.S.C.
1655(c)))

[Doc. No. 5074, 29 FR 15695, Nov. 24, 1964, as
amended by Amdt. 27–14, 43 FR 2325, Jan. 16,
1978; Amdt. 27–23, 53 FR 34214, Sept. 2, 1988;
Amdt. 27–29, 59 FR 47767, Sept. 16, 1994]

§ 27.1523

Minimum flight crew.

The minimum flight crew must be es-

tablished so that it is sufficient for safe
operation, considering—

(a) The workload on individual crew-

members;

(b) The accessibility and ease of oper-

ation of necessary controls by the ap-
propriate crewmember; and

under § 27.1525.

§ 27.1525

Kinds of operations.

The kinds of operations (such as

VFR, IFR, day, night, or icing) for
which the rotorcraft is approved are es-
tablished by demonstrated compliance
with the applicable certification re-
quirements and by the installed equip-
ment.

[Amdt. 27–21, 49 FR 44435, Nov. 6, 1984]

§ 27.1527

Maximum operating altitude.

The maximum altitude up to which

operation is allowed, as limited by
flight, structural, powerplant, func-
tional, or equipment characteristics,
must be established.

(Secs. 313(a), 601, 603, 604, and 605 of the Fed-
eral Aviation Act of 1958 (49 U.S.C. 1354(a),
1421, 1423, 1424, and 1425); and sec. 6(c) of the
Dept. of Transportation Act (49 U.S.C.
1655(c)))

[Amdt. 27–14, 43 FR 2325, Jan. 16, 1978]

§ 27.1529

Instructions for Continued

Airworthiness.

The applicant must prepare Instruc-

tions for Continued Airworthiness in
accordance with appendix A to this
part that are acceptable to the Admin-
istrator. The instructions may be in-
complete at type certification if a pro-
gram exists to ensure their completion
prior to delivery of the first rotorcraft
or issuance of a standard certificate of
airworthiness, whichever occurs later.

[Amdt. 27–18, 45 FR 60177, Sept. 11, 1980]

ARKINGS AND

LACARDS

§ 27.1541

General.

(a) The rotorcraft must contain—
(1) The markings and placards speci-

fied in §§ 27.1545 through 27.1565, and

(2) Any additional information, in-

strument markings, and placards re-
quired for the safe operation of rotor-
craft with unusual design, operating or
handling characteristics.

(b) Each marking and placard pre-

scribed in paragraph (a) of this sec-
tion—

(1) Must be displayed in a con-

spicuous place; and

(2) May not be easily erased, dis-

figured, or obscured.

§ 27.1543

Instrument markings: gen-

eral.

For each instrument—
(a) When markings are on the cover

glass of the instrument, there must be
means to maintain the correct align-
ment of the glass cover with the face of
the dial; and

(b) Each arc and line must be wide

enough, and located, to be clearly visi-
ble to the pilot.

§ 27.1545

Airspeed indicator.

(a) Each airspeed indicator must be

marked as specified in paragraph (b) of
this section, with the marks located at
the corresponding indicated airspeeds.

(b) The following markings must be

made:

(1) A red radial line—
(i) For rotocraft other than heli-

copters, at V

; and

(ii) For helicopters at V

(power-on).

(2) A red cross-hatched radial line at

(power-off) for helicopters, if V

(power-off) is less than V

(power-on).

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