Engine and Related Systems
T-45C TS, ADV & IUT ENG-04
LESSON NOTES (cont.)
5.
Throttle - IDLE WHEN RPM REACHES 15% N2
MINIMUM
Overlay 5
a.
Sub-idle fuel control unit (SIFCU) schedules
Throttle - Idle
fuel to combustion chamber and lightoff must
occur within 15 sec
NOTE: The C AUG caution light, MASTER
ALERT light and CAUTION TONE will
illuminate/sound during ground starts when the
RPM is between 30% and 36%
b. Engine should accelerate to 45% within 28 sec
(1) At 45% N2:
Overlay 6
45% N2 rpm
(a) GTS shuts down
(b) Generator comes on line
(c) READY advisory light goes out
(d) Ignition is deenergized
6.
Engine accelerates to IDLE ( approx. 52%) within
30 sec after
7.
Advance throttle slowly to 70% N2. (SOP)
NOTE: Bleed valve closure should occur at
61 +/- 4%.
8.
Return throttle to idle stop and check N2 stabilizes
at ( approx. 55 +/-2% )
Change 5 (9-98)
Page 4-25
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