Section 27.1523

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

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 demonstrated during the type tests;
(2) The maximum allowable gas temperature; and
(3) The maximum allowable torque.
(Secs. 313(a), 601, 603, 604, and 605 of the Federal 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]

Section 27.1523

Minimum flight crew.

The minimum flight crew must be established so that it is sufficient for safe
operation, considering - 
(a) The workload on individual crewmembers;
(b) The accessibility and ease of operation of necessary controls by the appropriate crewmember; and
(c) The kinds of operation authorized
under Section 27.1525.
Section 27.1525

Kinds of operations.

The kinds of operations (such as
VFR, IFR, day, night, or icing) for
which the rotorcraft is approved are established by demonstrated compliance
with the applicable certification requirements and by the installed equipment.
[Amdt. 27-21, 49 FR 44435, Nov. 6, 1984]

Section 27.1527

Maximum operating altitude.

spaschal on DSK3GDR082PROD with CFR

The maximum altitude up to which
operation is allowed, as limited by
flight, structural, powerplant, functional, or equipment characteristics,
must be established.
(Secs. 313(a), 601, 603, 604, and 605 of the Federal 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]

Section 27.1529 Instructions for Continued
Airworthiness.
The applicant must prepare Instructions for Continued Airworthiness in
accordance with appendix A to this
part that are acceptable to the Administrator. The instructions may be incomplete at type certification if a program 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]

MARKINGS AND PLACARDS
Section 27.1541 General.
(a) The rotorcraft must contain - 
(1) The markings and placards specified in SectionSection 27.1545 through 27.1565, and
(2) Any additional information, instrument markings, and placards required for the safe operation of rotorcraft with unusual design, operating or
handling characteristics.
(b) Each marking and placard prescribed in paragraph (a) of this section - 
(1) Must be displayed in a conspicuous place; and
(2) May not be easily erased, disfigured, or obscured.
Section 27.1543 Instrument markings: general.
For each instrument - 
(a) When markings are on the cover
glass of the instrument, there must be
means to maintain the correct alignment 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 visible to the pilot.
Section 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 helicopters, at VNE; and
(ii) For helicopters at VNE (power-on).
(2) A red cross-hatched radial line at
VNE (power-off) for helicopters, if VNE
(power-off) is less than VNE (power-on).

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