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Protect all control surface bearings and other lubricated components before cleaning the airplane.
Use large quantities of water to clean the airplane. If necessary, add a mild-cleaning agent to the
water. Remove excess dirt or dead insects immediately after flight. Dried-on dirt is difficult to
remove.
CAUTION: DO NOT USE CLEANING OR POLISHING AGENTS WHICH CONTAIN
SILICONE. IF THE AIRPLANE NEEDS REPAIR, SILICONE CAN
PREVENT REPAIR MATERIALS FROM BONDING CORRECTLY
Approximately once a year, apply a silicone-free automotive polish to the outer surface.
3. Canopy Cleaning
CAUTION: DO NOT RUB THE CANOPY WHILE IT IS DRY. DO NOT USE DIRTY
CLOTHS OR SPONGES. THE PLEXIGLASS CANOPY SCRATCHES
VERY EASILY WITH EVEN THE SMALLEST PARTICLES OF DUST
Clean the canopy with large quantities of water. Use clean sponges and a good chamois leather
which is not used for any other purpose.
Polish dull or scratched areas using a special Plexiglas cleaner. Remove scratches with special
polishing emery cloth (eg Micromesh).
4. Interior Cleaning
Clean the interior with a flameproof vacuum cleaner.
Servicing
DA20-C1 AMM
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5. Engine Cleaning
Use a cold cleaning agent to clean the engine.
CAUTION: DO NOT LET THE CLEANING AGENT GET INTO ELECTRICAL
COMPONENTS AND ENGINE INTAKES.
CAUTION: DO NOT LET THE CLEANING AGENT CONTAMINATE THE VACUUM
PUMP AND COMPONENTS. YOU MAY DAMAGE THE VACUUM
PUMP.
CAUTION: DO NOT START THE ENGINE UNTIL ALL OF THE CLEANING AGENT
HAS EVAPORATED
Protect all electrical components and engine intakes with polythene bags or other means. Obey the
cleaning agent manufacturers instructions. Protect the vacuum pump and it’s main components
from contamination. Make sure that the vacuum pump fittings are not loose. Refer to the
manufacturers Maintenance Instruction Manual for more data.
6. Ice and Snow Removal
Remove snow and ice as soon as possible to prevent melted water from freezing later and causing
damage.
CAUTION: DO NOT USE SHARP OBJECTS TO REMOVE SNOW OR ICE. YOU
CAN DAMAGE THE AIRCRAFT STRUCTURE.
Use soft brushes to remove snow from the surfaces. If possible put the airplane in a heated hangar
to remove ice.
Commercially available Ethylene Glycol or Propylene Glycol aircraft de-ice solutions prepared and
applied according to the product manufacturer instructions may be used to aid in the removal of ice.
Collect and dispose of fluid in accordance with applicable laws and regulations.
WARNING: NEITHER OF THESE PRODUCTS PROVIDES “HOLDOVER TIME”.
HOLDOVER TIME IS THE ESTIMATED AMOUNT OF TIME A FLUID
WILL PREVENT ICE AND SNOW FROM REFORMING ON SURFACES
UNDER FREEZING PRECIPITATION CONDITIONS.
DA20-C1 AMM
Standard Practices
Airframe
Doc # DA201-C1
Rev. 0 20-TITLE Page 1
19 Dec 1997
CHAPTER 20
STANDARD PRACTICES - AIRFRAME
Standard Practices
Airframe
DA20-C1 AMM
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Standard Practices
Airframe
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TABLE OF CONTENTS
CHAPTER 20 STANDARD PRACTICES - AIRFRAME............................................................................1
1. General .............................................................................................................................1
2. Bolt and Nut Types Used in the Airplane..........................................................................1
3. Standard Torque Values...................................................................................................2
4. Special Torques................................................................................................................3
5. Torque Measurement .......................................................................................................3
6. Torque Conversion Graphs ..............................................................................................5
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Airframe
DA20-C1 AMM
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Airframe
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CHAPTER 20-00
STANDARD PRACTICES - AIRFRAME
1. General
There are no maintenance practices which apply to the DA20-C1 airframe and its systems in
general. This Chapter only has data about standard threaded fasteners.
Always tighten the nut or bolt to the torque shown in the tables below. Always use the correct
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