(g)
Ifthe automaticpilotintegrates signalsfrom auxiliarycontrols orfurnishes signalsfor operation of other equipment, there must be positive interlocks and sequencing of engagement to prevent improper operation. Protection against adverse interaction of integrated components, resulting from a malfunction, is also required.
(h)
[If the automatic pilot system can be coupled to airborne navigation equipment, meansmustbeprovidedtoindicatetothe .ight crewthecurrent modeof operation. Selector switch position is not acceptable as a means of indication.]
Amdt. 25-46, E.. 12/1/78
′
Elodie Roux. Septembre 2003
Subpart F : Equipment
FAR 25.1331 : Instruments using a power supply.
(a)
For eachinstrument requiredby Sec.25.1303(b) thatuses apower supply,thefollo-wing apply :
(1)
[Each instrument must have a visual means integral with the instrument, to indicate when power adequate to sustain proper instrument performance is not being supplied. The power must be measured at or near the point where it enters the instruments. For electric instruments, the power is considered to be adequate when the voltage is within approved limits.
(2)
Each instrument must, in the event of the failure of one power source, be supplied by another power source. This may be accomplished automatically or by manual means.
(3)
If aninstrumentpresenting navigationdata receivesinformationfrom sources external to that instrument and loss of that information would render the presented data unreliable, the instrument must incorporate a visual means to warn the crew when such loss of information occurs, that the presented data should not be relied upon.]
(b)
Asusedinthissection, ”instrument” includesdevicesthatarephysically contained in one unit, anddevices that are composed of two or morephysically separate units or components connected together(such as a remoteindicatinggyroscopicdirection indicatorthatincludes amagneticsensing element,agyroscopicunit, anampli.er, and an indicator connected together.)
Amdt. 25-41, E.. 9/1/77
FAR25.1333 :[Instrument systems.]
[For systems that operate the instruments required by Sec. 25.1303(b) which are located at each pilot’s station–
(a)
Means must be provided to connect the required instruments at the .rst pilot’s station to operating systems which are independent of the operating systems at other .ight crew stations, or other equipment.
(b)
The equipment, systems, and installations must be designed so that one display of the information essential to the safety of .ight which is provided by the instru-ments, including attitude, direction, airspeed, and altitude will remain available to the pilots, without additional crewmember action, after any single failure or combination of failures that is not shown to be extremely improbable; and
(c)
Additional instruments, systems, or equipment may not be connected to the opera-ting systemsforthe requiredinstruments,unlessprovisionsaremadeto ensurethe continued normal functioning of the required instruments in the event of any mal-function of the additional instruments, systems, or equipment which is not shown to be extremely improbable.]
Amdt. 25-23, E.. 5/8/70
FAR25.1335 :[Flightdirector systems.]
[ If a .ight director system is installed, means must be provided to indicate to the .ight crew its current mode of operation. Selector switch position is not acceptable as a means of indication.] Amdt. 25-41, E.. 9/1/77
FAR 25.1337 : Powerplant instruments.
(a)
[Instruments and instrument lines.
(1)
Each powerplant and auxiliary power unit instrument line must meet the re-quirements of Sec. 25.993 and 25.1183.
(2)
Each line carrying .ammable .uids under pressure must–
(i)
Have restricting ori.ces or other safety devices at the source of pressure to prevent the escape of excessive .uid if the line fails; and
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：FAA规章 美国联邦航空规章 Federal Aviation Regulations 4(21)
