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Task 7.3 – Annual maintenance of airborne batteries
OPERATING INSTRUCTION AND TECHNICAL REQUIREMENTS (TR) INSTRUCTIONS / EVIDENCE WHEN DEVIATIONS FROM TR
1. Remove the lid and check that the gasket is fully adhered to
the lid.
Any damage found, record defect and replace in accordance with
the Repair Task 10.6.
2. Inspect battery container and lid for any damages, signs of dents,
cracks, splits, overheating, short circuits, melting, dark spots and
tarnish.
Any damage found, record defect and replace in accordance with
the Repair Task 10.6.
3. Inspect the main connector for signs of damage caused by
arcing, faulty connection, corrosion, loose parts and cracks in the
connector casing.
Any damage found, record defect and replace in accordance with
the Repair Task 10.5.
CAUTION:
Mineral salts from spilled electrolyte are caustic. When cleaning
batteries and cells wear goggles and gloves; in addition wear dust
mask and ear protection when applying compressed air for
cleaning; the compressed air shall have a pressure below 3 bar.
4. Tighten any loose vent plugs and clean the top of the cells with
a plastic brush, and remove any remaining deposits with an
oil-free compressed air.
5. Tighten and torque the upper nuts as detailed in section 1.6.2,
table 1.
6. Inspect visually harnesses with temperature switches, thermistors,
thermocouples, and for loose wiring, cracks, dents, connector pins
in place and any damages.
Any damage found, record defect and replace in accordance with
the Repair Task 10.4.
7. Measure and record cell voltages.
8. Mark cells with voltages lower than 1.2V (as possible
defective cells).
9. Undo the vents and keep them aside on the cells mouth.
ATTENTION
Do not top up the cells with water at this stage.
10. Connect the battery to the charge / discharge unit.
ATTENTION
Do not use mercury thermometer.
11. Check the battery temperature; Requirement: below 35°C.
Soak the battery to ambient room temperature, which can take up
to 8 hours.
The document reference is online, please check the correspondence between the online documentation and the printed version.
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