[Code of Federal Regulations]
[Title 14, Volume 2]
[Revised as of January 1, 2008]
From the U.S. Government Printing Office via GPO Access
[CITE: 14CFR125.213]

[Page 1002-1003]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION 
                               (CONTINUED)
 
 PART 125_CERTIFICATION AND OPERATIONS: AIRPLANES HAVING A SEATING CAPACITY OF 
 
             Subpart F_Instrument and Equipment Requirements
 
Sec. 125.213  Miscellaneous equipment.

    No person may conduct any operation unless the following equipment 
is installed in the airplane:
    (a) If protective fuses are installed on an airplane, the number of 
spare fuses approved for the airplane and appropriately described in the 
certificate holder's manual.
    (b) A windshield wiper or equivalent for each pilot station.
    (c) A power supply and distribution system that meets the 
requirements of Sec. Sec. 25.1309, 25.1331, 25.1351 (a) and (b) (1) 
through (4), 25.1353, 25.1355, and 25.1431(b) or that is able to produce 
and distribute the load for the required instruments and equipment, with 
use of an external power supply if any one power source or component of 
the power distribution system fails. The use of common elements in the 
system may be approved if the Administrator

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finds that they are designed to be reasonably protected against 
malfunctioning. Engine-driven sources of energy, when used, must be on 
separate engines.
    (d) A means for indicating the adequacy of the power being supplied 
to required flight instruments.
    (e) Two independent static pressure systems, vented to the outside 
atmospheric pressure so that they will be least affected by air flow 
variation or moisture or other foreign matter, and installed so as to be 
airtight except for the vent. When a means is provided for transferring 
an instrument from its primary operating system to an alternative 
system, the means must include a positive positioning control and must 
be marked to indicate clearly which system is being used.
    (f) A placard on each door that is the means of access to a required 
passenger emergency exit to indicate that it must be open during takeoff 
and landing.
    (g) A means for the crew, in an emergency, to unlock each door that 
leads to a compartment that is normally accessible to passengers and 
that can be locked by passengers.