p/n 725.0002 REV 3.0
© 2023 TCW Technologies, LLC.
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Instructions for Continued Airworthiness
Inspection and endurance testing procedures:
Electronic Ignition System Back-up
On at least an annual basis the inspection of the IBBS system and the endurance
capability of the IBBS system shall be confirmed and compared against the back-up
endurance required for the connected equipment.
As an alternate to these tests, the IBBS unit may be returned to TCW Technologies for a loaded
endurance test, contact TCW Technologies LLC. for details.
Inspection:
Visually inspect the IBBS unit and its surrounding location to ensure there has not been
damaged from: environmental or physical impacts such as mechanical shock, vibration,
heat and possible abuses encountered during storage or utilization.
If the unit has been damaged in any way or does not comply with the following endurance
test, the unit must be replaced with the same Part Number unit or later FAA approved
revision. The use of alternate models will require a new FAA installation approval. The
internal battery is not field replaceable. The IBBS unit must be returned to TCW
Technologies, LLC for all repair and servicing requirements.
Endurance testing:
COMPLETE THESE STEPS IN ORDER
Perform these tests with the aircraft properly
secured on the ground, these are not flight test procedures.
1) Start the aircraft using normal starting procedures, including turning ON the Back-up
Master switch
2) Select engine operation based on the use of only the electronic ignition module
provided with back-up battery power.
3) PULL the circuit breaker feeding pins 4,5 of the IBBS system, confirm engine continues
to run.
4) PULL the circuit breaker feeding pins 6,7,8 of the IBBS, confirm the engine continues to
run.
5) Perform the following; test A or test B:
Test A:
abbreviated battery test:
Monitor engine operation and voltmeter reading on any of pin 12,13,14,15, the back-up
power output. Confirm back-up voltage begins above 13 volts and for a period of 15
minutes remains above 12.5 volts. If these requirements are met the battery pack is
satisfactory.
