p/n 725.0002 REV 1.4
© 2021 TCW Technologies, LLC.
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6) Turn off the Back-up Master Switch and confirm that the engine turns off.
7) If all these tests pass, the IBBS system is functioning properly, record the results in the
aircraft logbook.
8) If any of these tests fail, the IBBS system is not functioning properly and corrective action
must take place. If the IBBS no longer meets the endurance testing requirement, the
back-up battery may need replacement or service.
9) Return all pullable breakers to the normal ON position and ensure aircraft engine is
properly returned to the off position by following normal run and shut down procedures.
10) After completing these tests, recharge the IBBS product by operating the system normally
for up to 1.5 hours. This may be accomplished by operating the aircraft in conditions
known to not require back-up power or by powering the aircraft system on a suitable
ground power source as described in the section: Ground Base Recharging.
Service Life:
Expected service life for the internal battery pack is greater than 500 discharge
cycles. Operational performance must be checked at least annually per the requirements
for continued airworthiness listed above. At the end of 72 months of service installation the
internal battery pack must be replaced.
