675 

Federal Aviation Administration, DOT 

§ 29.1557 

§ 29.1547

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. 

§ 29.1549

Powerplant instruments. 

For each required powerplant instru-

ment, as appropriate to the type of in-
struments— 

(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 oper-

ating range must be marked to be 
clearly differentiated from the mark-
ings 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] 

§ 29.1551

Oil quantity indicator. 

Each oil quantity indicator must be 

marked with enough increments to in-
dicate readily and accurately the quan-
tity of oil. 

§ 29.1553

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. 

§ 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 con-

trol must be marked to indicate the po-
sition 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 cor-
responding to each engine controlled. 

(c) Usable fuel capacity must be 

marked as follows: 

(1) For fuel systems having no selec-

tor 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 posi-
tion must be indicated near the selec-
tor control. 

(d) For accessory, auxiliary, and 

emergency controls— 

(1) Each essential visual position in-

dicator, 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 re-

tractable 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] 

§ 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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