Code of Federal Regulations - Title 14

523

Federal Aviation Administration, DOT

§ 25.1553

grooved or treated with a porous fric-
tion course, and may be approved for
use on runways where such surfaces
have been designed constructed, and
maintained in a manner acceptable to
the Administrator.

(b) The extremes for variable factors

(such as altitude, temperature, wind,
and runway gradients) are those at
which compliance with the applicable
provisions of this part is shown.

[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as
amended by Amdt. 25–38, 41 FR 55468, Dec. 20,
1976; Amdt. 25–72, 55 FR 29786, July 20, 1990;
Amdt. 25–92, 63 FR 8321, Feb. 18, 1998]

§ 25.1535

ETOPS approval.

Except as provided in § 25.3, each ap-

plicant seeking ETOPS type design ap-
proval must comply with the provi-
sions of Appendix K of this part.

[Doc. No. FAA–2002–6717, 72 FR 1873, Jan. 16,
2007]

ARKINGS AND

LACARDS

§ 25.1541

General.

(a) The airplane must contain—
(1) The specified markings and plac-

ards; and

(2) Any additional information, in-

strument markings, and placards re-
quired for the safe operation if there
are unusual design, operating, or han-
dling 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.

§ 25.1543

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 instrument marking must

be clearly visible to the appropriate
crewmember.

[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as
amended by Amdt. 25–72, 55 FR 29786, July 20,
1990]

§ 25.1545

Airspeed limitation informa-

tion.

The airspeed limitations required by

§ 25.1583 (a) must be easily read and un-
derstood by the flight crew.

§ 25.1547

Magnetic direction indicator.

(a) A placard meeting the require-

ments of this section must be installed
on, or near, the magnetic direction in-
dicator.

(b) The placard must show the cali-

bration of the instrument in level
flight with the engines operating.

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.

§ 25.1549

Powerplant and auxiliary

power unit instruments.

For each required powerplant and

auxiliary power unit instrument, as ap-
propriate to the type of instrument—

(a) Each maximum and, if applicable,

minimum safe operating limit must be
marked with a red radial or a red line;

(b) Each normal operating range

must be marked with a green arc or
green line, not extending beyond the
maximum and minimum safe limits;

range must be marked with a yellow
arc or a yellow line; and

(d) Each engine, auxiliary power

unit, or propeller speed range that is
restricted because of excessive vibra-
tion stresses must be marked with red
arcs or red lines.

[Amdt. 25–40, 42 FR 15044, Mar. 17, 1977]

§ 25.1551

Oil quantity indication.

Each oil quantity indicating means

must be marked to indicate the quan-
tity of oil readily and accurately.

[Amdt. 25–72, 55 FR 29786, July 20, 1990]

§ 25.1553

Fuel quantity indicator.

If the unusable fuel supply for any

tank exceeds one gallon, or five per-
cent of the tank capacity, whichever is
greater, a red arc must be marked on
its indicator extending from the cali-
brated zero reading to the lowest read-
ing obtainable in level flight.

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