Tecnam P2002 JF - Battery Capacity Test

Page 206 2
nd
Edition – Rev 0
24-10
POWER GENERATION – MAINTENANCE PRACTICE
5. BATTERY CAPACITY TEST
Step no.
Battery capacity test
Task description
Additional info &
References
1.
Remove the battery from the airplane
See Chapter 12-60
2.
Charge battery according to par 4
Refer to Par. 4 – Battery
servicing
3.
Connect the fully charged battery to a capacity
tester that incorporates a load resistance, amp
meter, volt meter and a timer.
4.
Discharge the battery at the one hour capacity rate
to 10 volts. Record the discharge time.
5.
The battery is considered airworthy if it meets
80% of the one hour capacity rating (48 minutes
to the cut-off voltage).
6.
If the battery fails to meet the minimum run-time,
recharge using the constant current method until
the specific gravity reading stabilizes over three
consecutive readings. Allow the battery to stand
on open circuit for one hour.
Refer to Par. 4 – Battery
servicing
7.
Repeat the discharge test as indicated. If the
failure persists, replace the battery.
Refer to Par. 4 – Battery
servicing
8.
If the battery is found to be airworthy, it must be
recharged prior to re-installing it in the aircraft.
9.
Install the battery on the airplane
See Chapter 12-60