COMPONENT MAINTENANCE MANUAL
BA27
24-01-01
T
h
is docum
ent
contains D
a
ta
control
led by th
e U.S. Export Admini
str
a
tion
Reg
u
lati
ons. Di
versio
n or use
contrary to U.S. law is
proh
ibit
ed
I
.
Battery shop test upon removal from aircraft
(1)
In normal service, the FCDC battery must be removed from the aircraft
after 3.2 years and this shop test must be done.
The service life of the FCDC battery is five years. The battery may be
removed and replaced or re-blocked twice over a 15 year period of time.
Refer to DISASSEMBLY for re-blocking instructions.
(2)
If however, as a result of a battery fault indication on the aircraft, the
battery is removed for investigation, follow the fault finding procedure
below.
(3)
Fault Finding Procedure:
There are two options available for carrying out the fault finding
procedure depending on the available discharge equipment.
a.) Option 1 – Using a 10 Amp discharge unit:
i.)
Check the battery open circuit voltage.
ii.)
Perform a discharge as received test; discharge battery
to 21.0 volts and record the results.
iii.)
Recharge the battery in accordance with paragraph H.
iv.)
Allow the battery to stand open circuit voltage for 4 hours
minimum.
v.)
Discharge the battery at 10 Amps to an end voltage
of 21.0 volts.
vi.) If a discharge duration of 8 minutes or greater is
achieved, then the battery has passed the test.
Recharge the battery in accordance with paragraph H
and return to service.
vii.)
If the discharge duration is less than 8 minutes, recharge
the battery in accordance with paragraph H for 12 – 24
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Mar 13/17