Textron Cessna Grand Caravan Ex 208B Pilot's Operating Handbook And Faa Approved Airplane Flight Manual page 648

SECTION 8
AIRPLANE HANDLING, SERVICE
AND MAINTENANCE
PROLONGED OUT OF SERVICE CARE
c. 29 to 90 Days - An engine inactive for a period exceeding 28
days, but less than 91 days, need only have the fuel system
preserved, engine openings covered, and desiccant bags
and humidity indicators installed.
d. 91 Days and Over - An engine inactive over 90 days in the
airframe or removed for long-term storage in a container,
must, in addition to the 29 to 90 day procedure, have the
engine oil drained and unused accessory drive pads
sprayed.
2. Place a cover over the pitot tube and install the two engine inlet
covers. To prevent the propeller from windmilling, install the
propeller anchor over a blade of the propeller and secure the
strap around the nose gear or to the bracket located on the
lower right hand cowl. Cover all other openings to prevent entry
of foreign objects.
3. Keep the fuel tanks full to minimize condensation in the tanks.
4. If the airplane will be out of service for 5 days or more,
disconnect the battery. If the battery is left in the airplane, it must
be removed and serviced regularly to prevent discharge. If the
battery is removed from the airplane, check it regularly for state
of charge.
5. If the airplane is stored outside, tiedown the airplane in
accordance with the procedure in this section. Chock the nose
and main wheels; do not set the parking brake if a long period of
inactivity is anticipated as brake seizing can result.
6. Either block up fuselage to relieve pressure on tires or rotate
wheels every two weeks to prevent flat areas on tires. Mark tires
with tape to ensure tire is placed approximately 90 degrees from
previous position.
7. Drain all fuel drain points every 30 days and check for water
accumulation. Prolonged storage of the airplane will result in a
water buildup in the fuel which "leaches out" the fuel additive. An
indication of this is when an excessive amount of water
accumulates at the fuel drain points. Refer to Fuel Additive in
this section for minimum allowable additive concentrations.
8-58 U.S.
CESSNA
MODEL 208B 867 SHP
GARMIN G1000
(Continued)
208BPHCUS-00