1-107 TEST ENGINE (AVIM) (Continued)
21. NORMAL SHUTDOWN PROCEDURE
a. Retard N1 master hydronic control to ground idle (10 to 15 degrees).
b. Place fuel control switch to OFF.
c. Simultaneously place N1 master hydronic control to shutoff position, and depress timer start switch.
Listen for abnormal noises.
A light to moderate amount of smoke emission during and im-
mediately subsequent to coastdown is normal and acceptable
provided oil leakage and consumption is within acceptable limits.
d. Record N1 coastdown time. If N1 coastdown time is less than 25 seconds or abnormal noises are
e. Press water pump, cooling tower, and cooling fan buttons off. Shut off air pressure to water brake
f. Place fuel solenoid, 400 cycle, and DC switches to OFF.
g. Check engine for excessive oil leakage through combustion chamber overboard drain or oil streaks on
engine exhaust section. This condition indicates possible oil leakage past No. 4 and 5 bearing seals. If
leakage is indicated, check seal leakage, No. 4 and 5 bearing (Ref. Task 1-88).
GO TO NEXT PAGE