CESSNA AIRCRAFT COMPANY FOR TRAINING USE ONLY
MODEL 152 4-13
Taxiing over loose gravel or cinders should be done at low engine speed to avoid abrasion and stone
damage to the propeller tips.
The nose wheel is designed to automatically center straight ahead when the nose strut is fully extended.
In the event the nose strut is over inflated and the airplane is loaded to a rearward center of gravity
position, it may be necessary to partially compress the strut to permit steering. This can be
accomplished prior to taxiing by depressing the airplane nose (by hand) or during taxi by sharply
applying brakes.
BEFORE TAKEOFF
WARM-UP
Most of the warm-up will have been conducted during taxi, and additional warm-up before takeoff
should be restricted to the checklist procedures. Since the engine is closely cowled for efficient in-flight
cooling, precautions should be taken to avoid overheating on the ground.
MAGNETO CHECK
The magneto check should be made at 1700 RPM as follows. Move ignition switch first to R position and
note RPM. Next move switch back to BOTH to clear the other set of plugs. Then move switch to the L
position, note RPM and return the switch to the BOTH position. RPM drop should not exceed 125 RPM
on either magneto or show greater than 50 RPM differential between magnetos. If there is a doubt
concerning operation of the ignition system, RPM checks at higher engine speeds will usually confirm
whether a deficiency exists.
An absence of RPM drop may be an indication of faulty grounding of one side of the ignition system or
should be cause for suspicion that the magneto timing is set in advance of the setting specified.
ALTERNATOR CHECK
Prior to flight where verification of proper alternator and voltage regulator operation is essential (such
as night or instrument flights), a positive verification can be made by loading the electrical system
momentarily (3 to 5 seconds) with the landing light, or by operating the wing flaps during the engine
run-up (1700 RPM). The ammeter will remain within a needle width of its initial position if the
alternator and voltage regulator are operating properly.
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