[Code of Federal Regulations]
[Title 14, Volume 1]
[Revised as of January 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 14CFR25.1303]
[Page 454-455]
TITLE 14--AERONAUTICS AND SPACE
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
PART 25--AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES--Table of Contents
Subpart F--Equipment
Sec. 25.1303 Flight and navigation instruments.
(a) The following flight and navigation instruments must be
installed so that the instrument is visible from each pilot station:
(1) A free air temperature indicator or an air-temperature indicator
which provides indications that are convertible to free-air temperature.
(2) A clock displaying hours, minutes, and seconds with a sweep-
second pointer or digital presentation.
(3) A direction indicator (nonstabilized magnetic compass).
(b) The following flight and navigation instruments must be
installed at each pilot station:
(1) An airspeed indicator. If airspeed limitations vary with
altitude, the indicator must have a maximum allowable airspeed indicator
showing the variation of VMO with altitude.
(2) An altimeter (sensitive).
(3) A rate-of-climb indicator (vertical speed).
[[Page 455]]
(4) A gyroscopic rate-of-turn indicator combined with an integral
slip-skid indicator (turn-and-bank indicator) except that only a slip-
skid indicator is required on large airplanes with a third attitude
instrument system useable through flight attitudes of 360 deg. of pitch
and roll and installed in accordance with Sec. 121.305(k) of this title.
(5) A bank and pitch indicator (gyroscopically stabilized).
(6) A direction indicator (gyroscopically stabilized, magnetic or
nonmagnetic).
(c) The following flight and navigation instruments are required as
prescribed in this paragraph:
(1) A speed warning device is required for turbine engine powered
airplanes and for airplanes with VMO/MMO greater
than 0.8 VDF/MDF or 0.8 V D/
MD. The speed warning device must give effective aural
warning (differing distinctively from aural warnings used for other
purposes) to the pilots, whenever the speed exceeds VMO plus
6 knots or MMO +0.01. The upper limit of the production
tolerance for the warning device may not exceed the prescribed warning
speed.
(2) A machmeter is required at each pilot station for airplanes with
compressibility limitations not otherwise indicated to the pilot by the
airspeed indicating system required under paragraph (b)(1) of this
section.
[Amdt. 25-23, 35 FR 5678, Apr. 8, 1970, as amended by Amdt. 25-24, 35 FR
7108, May 6, 1970; Amdt. 25-38, 41 FR 55467, Dec. 20, 1976; Amdt. 25-90,
62 FR 13253, Mar. 19, 1997]