TM 1-1500-204-23-1
Table 7-2. Engine Conditioning - CONT
Complete
conditioning
When
Personnel
steps
Procedure
performed
responsible
Step 16. Engine Backfire
Place turbosupercharger in OFF
Test - continued
position. Carburetor air filters
should be by passed.
Set engine at specified rpm setting.
Move carburetor mixture control to
AUTO-LEAN. Move ignition switch
from BOTH to RIGHT and then to
LEFT for a sufficient length of time
in each position to permit engine
operation to stabilize. When moving
ignition switch from BOTH TO RIGHT
or LEFT, a high rmp drop will nor-
mally occur.
If the engine does not backfire from
either switch position, it is considered
satisfactory in this test. If it backfires,
one or more phases of engine
operation are not correct.
Step 17. Ignition
Set engine speed at specified rpm
Complete
Maintenance
Switch Check
Momentarily move Ignition switch
Conditioning
to OFF and determine that engine
completely ceases firing. Return
Daily Check
Air Crew
switch to BOTH as rapidly as possible
to eliminate possibility of backfiring.
Intermediate
Air Crew or
Check master switch same way.
Maintenance
Step 18. Spark Plug
Make cold cylinder check. Replace
Complete
Maintenance
Check
only defective plugs and repeat
Conditioning
steps 6 through 16.
7-34
