§25.1549. Powerplant and auxiliary power unit instruments.
14 C.F.R. § 25.1549
For each required powerplant and auxiliary power unit instrument, as appropriate to the type of instrument—
Each maximum and, if applicable, minimum safe operating limit must be marked with a red radial or a red line;
Each normal operating range must be marked with a green arc or green line, not extending beyond the maximum and minimum safe limits;
Each takeoff and precautionary range must be marked with a yellow arc or a yellow line; and
Each engine, auxiliary power unit, or propeller speed range that is restricted because of excessive vibration stresses must be marked with red arcs or red lines.
Notes, amendments, and revision history
Amendments
[Amdt. 25-40, 42 FR 15044, Mar. 17, 1977]
Authority
Authority: 49 U.S.C. 106(f), 106(g), 40113, 44701, 44702 and 44704; Pub. L. 115-254, 132 Stat 3281 (49 U.S.C. 44903 note).
Source
Source: Docket No. 5066, 29 FR 18291, Dec. 24, 1964, unless otherwise noted.
Amendments
[Amdt. 25-40, 42 FR 15044, Mar. 17, 1977]