AIRCRAFT MAINTENANCE MANUAL
DFE-AMM-AR1
Rev. 1 – 07/24/2014
9-4
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Instructions:
Annual cleaning of electrical equipment to remove dust, dirt, and grime is recommended.
Suitable solvents or fine abrasives that will not score the surface or remove the plating may be
used to clean the terminals and mating surfaces if they are corroded or dirty. Only cleaning
agents that do not leave any type of residue must be used.
Components must be cleaned and preserved in accordance with the manufacturer’s
instructions. Avoid using emery cloth to polish commutators or slip rings because particles may
cause shorting and burning. Be sure that protective finishes are not scored or damaged when
cleaning.
DISCONNECT BATTERY BEFORE CLEANING
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Task proper accomplishment check: Operational check of electrically operated equipment
such as motors, inverters, generators, batteries, lights, protective devices, etc.
9.2.2.3.
Battery electrolyte corrosion cleaning /only for NON maintenance-free
accumulators/
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Tools needed: Screwdriver, metric wrenches
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Parts needed: Brush, sodium bicarbonate solution
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Type of maintenance: Line
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Level of Certification needed:
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Repairman (LS-M) or Mechanic (A&P) – both with the minimum level of certification to
perform heavy maintenance of SLSA in the U.S.
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FAA approved Part 145 Repair station
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Instructions:
1. Remove upper cowling
2. Remove the battery.
3. Corrosion found on or near lead-acid batteries and cables can be removed mechanically
with a stiff bristle brush and then chemically neutralized with a 10 percent sodium
bicarbonate and water solution. After neutralizing, the battery should be washed with
clean water and thoroughly dried.
4. Reinstall battery.
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Task proper accomplishment check: Operational check of electrically operated equipment
such as motors, inverters, generators, batteries, lights, protective devices, etc.
