Normal Procedures
CSP-HE/HS-1
ROTORCRAFT FLIGHT MANUAL
MD 500
(Models 369HE/HS/HM)
Revision 5
4-16
FAA Approved
During starts, overtemperatures between 793
°
C (C20) or 749
°
C
(C18) and 927
°
C are permitted for up 10 seconds with a momentary
peak at 927
°
C for not more than 1 second. Consult Allison Engine
Operation and Maintenance Manual if these limits are exceeded.
ABORT START IF:
1. An immediate temperature rise is not observed on the TOT
indicator.
2. No indication of engine oil pressure is observed.
3. Main rotor is not rotating by 25 percent N
1
.
4. A zero or positive indication is observed on ammeter with the
start button pressed.
NOTE
:
If an engine fire (may be indicated by flames emanating from the tailpipe) occurs,
pull out fuel valve and abort start.
F
Abort start procedures:
F F
Close twistgrip to the cutoff position.
F F
Use starter to continue motoring engine for at least ten seconds or until TOT
decreases below 150
°
C.
F
Start/ignition button−release at 58 to 60 percent N
1
RELEASE
F
Engine oil pressure50 to 130 psi
CHECK
NOTE
:
During cold weather operation, 150 psi oil pressure is allowable following an
engine start. Remain at
ground idle RPM until normal oil pressure limits are
attained.
F
Allcautionandwarningindicators out
CHECK
NOTE
:
Transmission oil pressure warning (
XMSN OIL PRESS
) indicator will go out
within 30 seconds from engine light-off;
GEN OUT
indicator will remain on until
the generator switch is moved to the
GEN
position.
F
Engine idle speed:
F F
250−C18
− 62 to 67 percent N
1
CHECK
F F
250−C20
− 61 to 65 percent N
1
CHECK
NOTE
:
During engine operation at ground idle, keep pedals centered.
F
All other engine instruments
CHECK
F F
N
2
engine and rotor rpm indicators for superimposed
reading.
CHECK
CAUTION
