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[Each fuel tank or each group of fuel tanks with interconnected vent systems must have an expansion space of not less than 2 percent of the tank capacity. It must be impossible to .ll the fuel tank expansion space inadvertently with the rotorcraft in the normal ground attitude.] Amdt. 27-23, E.. 10/3/88
FAR 27.971 : Fuel tank sump
(a)
[Eachfueltank musthave adrainable sump with an e.ective capacityin anyground attitude to be expected in service of 0.25 percent of the tank capacity or one sixteenth gallon, whichever is greater, unless–

(1)
The fuel systemhas a sediment bowl or chamber thatis accessibleforpre.ight drainage and has a minimum capacity of 1 ounce for every 20 gallons of fuel tank capacity; and

(2)
Each fuel tank drain is located so that in any ground attitude to be expected in service, water will drain from all parts of the tank to the sediment bowl or chamber.

 

(b)
Each sump, sediment bowl, and sediment chamber drain required by the section must comply with the drain provisions of Sec. 27.999(b).]

Amdt. 27-23, E.. 10/3/88
FAR 27.973 : Fuel tank .ller connection
(a)
[Each fuel tank .ller connection must prevent the entrance of fuel into any part of the rotorcraft other than the tank itself during normal operations and must be crash resistant during a survivable impact in accordance with Sec. 27.952(c). In addition–

(1)
Each .ller must be marked as prescribed in Sec. 27.1557(c)(1);

(2)
Each recessed .ller connectionthatcanretainany appreciablequantity offuel must have a drain that discharges clear of the entire rotorcraft; and

(3)
Each .llercap mustprovideafuel-tightseal underthe .uidpressureexpected in normal operation and in a survivable impact.

 

(b)
Each .ller cap or .ller cap cover must warn when the cap is not fully locked or seated on the .ller connection.]

Amdt. 27-30, E.. 11/2/94
FAR 27.975 : Fuel tank vents
(a)
Each fuel tank must be vented from the top part of the expansion space so that ventingise.ectiveunderall normal .ight conditions.Each vent mustminimizethe probability of stoppage by dirt or ice.

(b)
[The ventingsystem must be designed to minimize spillage of fuel through the vents to an ignition source in the event of a rollover during landing, ground operation, or a survivable impact.]

Amdt. 27-35, E.. 9/8/98
FAR 27.977 : Fuel tank outlet
(a) [There mustbe afuelstrainerforthefuel tank outlet orfortheboosterpump.This strainer must–
(1)
For reciprocatingenginepowered rotorcraft,have8 to16 meshesperinch; and

(2)
Forturbine enginepowered rotorcraft,preventthepassage of any objectthat could restrict fuel .ow or damage any fuel system component.

′
Elodie Roux. Septembre 2003
Subpart E : Powerplant
(b)
The clear area of each fuel tank outlet strainer must be at least .ve times the area of the outlet line.

(c)
The diameter of each strainer must be at least that of the fuel tank outlet.

(d)
Each .nger strainer must be accessible for inspection and cleaning.] Amdt. 27-11, E.. 2/1/77

65.4 Fuel System Components
FAR 27.991 : Fuel pumps
[Compliance withSec.27.955may notbejeopardizedby failure of–
(a)
Any one pump except pumps that are approved and installed as parts of a type certi.cated engine; or

(b)
Any component required for pump operation except, for engine driven pumps, the engine served by that pump.]

Amdt. 27-23, E.. 10/3/88
FAR 27.993 : Fuel system lines and .ttings
(a)
Eachfuellinemustbeinstalled and supported toprevent excessivevibrationand to withstand loads due to fuel pressure and accelerated .ight conditions.

(b)
Each fuel line connected to components of the rotorcraft between which relative motioncould existmusthaveprovisionsfor .exibility.
　
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本文鏈接地址：FAA規(guī)章 美國聯(lián)邦航空規(guī)章 Federal Aviation Regulations 4(111)