ENSTROM 480B OPERATOR'S MANUAL
2-17
FAA Approved: May 21/19
Rev. 24
Report No. 28-AC-023
May 2/19
NOTE
If the TOT is above 150
°
C, the pilot may elect
to motor the engine with the throttle off until
the TOT is below 150
°
C, prior to beginning this
engine start sequence. If the engine is equipped
with a start counter, this will count as a
“START” but can be deducted in the engine
records in accordance with the Rolls-Royce
250-C20 Series Operation and Maintenance
Manual.
4. Engine – Start as follows:
a. Starter switch – Press and hold. Simultaneously
start the clock stop watch function to time the
start to 58% N
1
.
b. TOT – Below 150
°
C. Motor engine as necessary to
lower TOT below 150
°
C.
c. Throttle – Open quickly to the idle stop after the N
1
RPM passes through 12-15%. Observe
recommended minimum N
1
speeds as noted below:
NOTE
If there is a delay of more than 3 seconds
between opening the throttle and light off of
the engine, the operator should return the
throttle to the OFF position and motor the
engine for 30 seconds to clear the fuel from the
burner can.
OAT (Outside Air Temp)
Minimum N
1
Speed
7
°
C and above
15%
7
°
C down to -18
°
C 13%
-18
°
C and below
12%
NOTE
It is not necessary to wait for the N
1
to peak.
