Federal Aviation Administration, DOT

Section 29.1557

Section 29.1547 Magnetic direction indicator.
(a) A placard meeting the requirements of this section must be installed
on or near the magnetic direction indicator.
(b) The placard must show the calibration of the instrument in level
flight with the engines operating.
(c) The placard must state whether
the calibration was made with radio receivers on or off.
(d) Each calibration reading must be
in terms of magnetic heading in not
more than 45 degree increments.
Section 29.1549 Powerplant instruments.
For each required powerplant instrument, as appropriate to the type of instruments - 
(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;
(c) Each takeoff and precautionary
range must be marked with a yellow
arc or yellow line;
(d) Each engine or propeller range
that is restricted because of excessive
vibration stresses must be marked with
red arcs or red lines; and
(e) Each OEI limit or approved operating range must be marked to be
clearly differentiated from the markings of paragraphs (a) through (d) of
this section except that no marking is
normally required for the 30-second
OEI limit.
[Amdt. 29-12, 41 FR 55474, Dec. 20, 1976, as
amended by Amdt. 29-26, 53 FR 34220, Sept. 2,
1988; Amdt. 29-34, 59 FR 47769, Sept. 16, 1994]

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Section 29.1551 Oil quantity indicator.
Each oil quantity indicator must be
marked with enough increments to indicate readily and accurately the quantity of oil.
Section 29.1553 Fuel quantity indicator.
If the unusable fuel supply for any
tank exceeds one gallon, or five percent of the tank capacity, whichever is
greater, a red arc must be marked on
its indicator extending from the calibrated zero reading to the lowest reading obtainable in level flight.

Section 29.1555 Control markings.
(a) Each cockpit control, other than
primary flight controls or control
whose function is obvious, must be
plainly marked as to its function and
method of operation.
(b) For powerplant fuel controls - 
(1) Each fuel tank selector valve control must be marked to indicate the position corresponding to each tank and
to each existing cross feed position;
(2) If safe operation requires the use
of any tanks in a specific sequence,
that sequence must be marked on, or
adjacent to, the selector for those
tanks; and
(3) Each valve control for any engine
of a multiengine rotorcraft must be
marked to indicate the position corresponding to each engine controlled.
(c) Usable fuel capacity must be
marked as follows:
(1) For fuel systems having no selector controls, the usable fuel capacity of
the system must be indicated at the
fuel quantity indicator.
(2) For fuel systems having selector
controls, the usable fuel capacity
available at each selector control position must be indicated near the selector control.
(d) For accessory, auxiliary, and
emergency controls - 
(1) Each essential visual position indicator, such as those showing rotor
pitch or landing gear position, must be
marked so that each crewmember can
determine at any time the position of
the unit to which it relates; and
(2) Each emergency control must be
red and must be marked as to method
of operation.
(e) For rotorcraft incorporating retractable landing gear, the maximum
landing gear operating speed must be
displayed in clear view of the pilot.
[Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as
amended by Amdt. 29-12, 41 FR 55474, Dec. 20,
1976; Amdt. 29-24, 49 FR 44440, Nov. 6, 1984]

Section 29.1557 Miscellaneous markings and
placards.
(a) Baggage and cargo compartments,
and ballast location. Each baggage and
cargo compartment, and each ballast
location must have a placard stating
any limitations on contents, including
weight, that are necessary under the
loading requirements.

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