Battery Shop Procedures

>> Friday, November 20, 2009

Battery Shop Procedures

1. Purpose

1.1 This procedure defines the maintenance of aircraft batteries (which includes Boost Charge, Capacitance Check, Overhaul and Storage) in the Battery Workshop.

2. Scope and Responsibilities

2.1 It is the responsibility of the approved technician to carry out all Battery Maintenance work in accordance with the approved Data, Manufacturer’s Overhaul Manuals and Operator approved procedure sheet.

2.2 It is responsibility of the authorized staff to take all necessary safety precautions as applicable to the battery maintenance.

2.3 It is responsibility of the Battery Shop Supervisor to check and ensure that all the work accomplished is in compliance with the relevant Approved Data, Battery Manufacturer’s Overhaul Manuals and Instructions.

2.4 Repair/overhaul/modification/testing of aircraft components is restricted to items on the approved capability list in accordance with the approved manufacturer’s manuals, approved technical data and approved procedures and standard of workmanship.

3. Procedures

3.1 Working area temperature should between 70ºF to 80ºF (21.1ºC to 26.7ºC)

3.2 Records and Documents
a) Check the serial number of the battery which is received by the shop and enter in the Battery Inward Shop Register,
b) Check unserviceable tag received with the battery,
c) Check the general condition of the battery,
d) The following records are to be maintained in the Battery Shop:
- Component Worksheet
- Battery Test Result History Card

3.3 Work to be carried out

a) Boost Charge
Boost Charge is the routine service for batteries which have been removed from the “Serviceable Storage Area” in the battery shop due to expiry of validity date after 14 days from release.

b) Capacity Test
- Capacity Test is the routine service required for batteries, which are returned to Battery Shop for servicing.
- For new batteries before their release to service.
c) Overhaul and Repair
Overhaul and repair service for batteries is necessary whenever:
- Battery found in an unsatisfactory general condition
- Battery fails to meet capacity test requirements
- Battery found with excessive leakage current

Note: All the above are to be carried out in accordance with Approved Data

3.4 Storage Service
a) Batteries, which have been serviced and tagged “Serviceable”, shall be stored in the “Serviceable Storage Area” in the Battery Shop
b) The “Serviceable Storage Area” shall be monitored daily. Any battery found with the validity date expired, shall be removed and re-processed through the Battery Shop according to the following procedures
c) Boost Charge
A battery which has exceeded 14 days storage period
d) Capacity Test
A battery is found due for capacity test after four months, (for all Airbus and B747SP aircraft)

3.5 Equipment Required
- Constant current charger
- Constant current discharger
- Digital Multimeter for voltage and leakage current measurement
- Compressed air, clean, dry and 20 PSI maximum
- Liquid level check tube
- Distilled water, Vaseline and lint free cloth

3.6 Re-certification and Serviceable Label
a) Before releasing any battery to service, check the relevant work sheets are satisfactorily completed.
- Component Work Sheet
- Test Result Record sheet
b) Fill out and attach a serviceable label and clear the entry in the Battery Shop Component Register.
c) Endorse the label with the validity period for storage in the Battery Shop. This date shall not exceed 14 days from the certification date. Place the battery in the approved storage area for serviceable batteries.
d) Enter the date of the capacity test due, on a brady aluminum label, and apply the label on the right side of the battery.
e) Enter all outgoing serviceable batteries in outward register kept in the Battery shop.



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