563
Federal Aviation Administration, DOT
§ 27.1547
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]
M
ARKINGS AND
P
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 line—
(i) For rotorcraft other than heli-
copters, at V
NE
.
(ii) For helicopters, at V
NE
(power-
on).
(iii) For helicopters, at V
NE
(power-
off). If V
NE
(power-off) is less than V
NE
(power-on) and both are simulta-
neously displayed, the red line at V
NE
(power-off) must be clearly distinguish-
able from the red line at V
NE
(power-
on).
(2) [Reserved]
(3) For the caution range, a yellow
range.
(4) For the normal operating range, a
green or unmarked range.
(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; 43 FR 3900, Jan. 30, 1978; Amdt. 27–16, 43
FR 50599, Oct. 30, 1978; Amdt. 27–51, 88 FR
8738, Feb. 10, 2023]
§ 27.1547
Magnetic direction indicator.
(a) A placard meeting the require-
ments of this section must be installed
on or near the magnetic direction indi-
cator.
(b) The placard must show the cali-
bration of the instrument in level
flight with the engines operating.
(c) The placard must state whether
the calibration was made with radio re-
ceivers on or off.
(d) Each calibration reading must be
in terms of magnetic heading in not
more than 45 degree increments.
(e) If a magnetic nonstabilized direc-
tion indicator can have a deviation of
more than 10 degrees caused by the op-
eration of electrical equipment, the
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