CSP–520N–1
MD 520N (500N) ROTORCRAFT FLIGHT MANUAL
Limitations
R
Revision 2
2–8
FAA Approved
Emergency
Aviation Gasoline MIL−G−5572E.
MIL–G–5572
aviation gasolines containing Tri–Cresyl–Phosphate
(TCP) additives shall not be used. Use of MIL–G–5572E gasolines is
limited to a maximum of 6 hours of operation per engine overhaul
period and operation within safe conditions. (Ref. Figure 2–3).
When using alternate fuel mixtures or emergency fuels, the start
pump must be on until the engine is shutdown (Ref. Figure 2–3).
Table 2–1. Unusable Fuel: Standard Non Self–Sealing Fuel Tanks
Fuel Type
Liters
Imp.
Gal
U.S.
Gal
Pounds/
Kilograms
Jet−A
7.2
1.6
1.9
13.1/5.9
Jet−B
7.2
1.6
1.9
12.5/5.7
Table 2–2. Unusable Fuel: Optional Self–Sealing Fuel Tanks
Fuel Type
Liters
Imp.
Gal
U.S.
Gal
Pounds/
Kilograms
Jet−A
7.9
1.7
2.1
14.3/6.5
Jet−B
7.9
1.7
2.1
13.6/6.2
Cold weather operations:
Fuels must meet anti−icing capability of JP−4 when operating at 4
°
C (40
°
F)
or less.
The 250−C20R/2 (SP) engine does not require fuel anti−ice additives above
fuel temperatures of −30
°
F (−34
°
C). However the continued use of anti−ice
additives under all temperature conditions is recommended to provide addi*
tional protection against fuel system icing and microbiological contamina*
tion.
Fuel filter:
Upon completion of the flight in progress, further flight is prohibited until
the fuel filter has been serviced following the illumination of the FUEL
FILTER caution light.
Fuel system purging:
Further flight is prohibited until the fuel system is purged (see HMI) following:
Engine flameout caused by fuel exhaustion.
Draining fuel from anti−ice fuel filter (if installed) without the start pump
on.
Engine shutdown using emergency fuel shutoff valve.
Motoring the engine without fuel in the fuel tank.
CAUTION
CAUTION
