The servicing period varies with aircraft type and application. However, the earliest servicing requirement will be 6
months after commissioning unless otherwise directed by the aircraft operators and / or regulatory bodies.
At the appropriate service point remove the battery from its installation to the battery test room.
Figure 5 - Discharge Rates
11.
SERVICE PERIOD
12.
CAPACITY TEST
10.3.2.1.2
If the result of the second capacity test is greater than 80% continue with step 10.4.
10.4
Record the capacity and date of test on the battery label.
10.5
Recharge battery per section 9.
10.6
Ensure the battery is clean and return the battery to service.
Battery Rating
Discharge current
18 ampere-hour
18 amps
25 ampere-hour
25 amps
37 ampere-hour
37 amps
40 ampere-hour
40 amps
11
Capacity testing is performed by discharging the battery with a constant current load at the one-hour rate and measuring
the time required (in minutes) to reach the cut off voltage.
Discharge the battery at the appropriate constant current value found in Figure 5 at 20 ± 2°C to an end voltage of 20
volts or 48 minutes whichever occurs first. Record the terminal voltage at the end of the discharge.
Note!
Discharge duration should not be allowed to exceed 48 minutes
If the discharge duration of 48 minutes is achieved, recharge the battery as detailed in paragraph 9. Record the test
result on the battery label and return to service.
If the discharge duration is less than 48 minutes, recharge the battery in accordance with paragraph 9. Allow the battery
to stand open circuit for a minimum of 4 hours before conducting a second capacity test.
If the discharge duration is in excess of 48 minutes, recharge the battery in accordance with paragraph 9. Record the
test result on the battery label and return to service.
If this second discharge duration is still below 48 minutes the battery should be rejected in accordance with paragraph
13 of this maintenance manual.
Summary of Contents for HAWKER 9250-0083
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