APU life counter
SPN1-1 Counter of the APU life parameters TA-8, TA-6A, TA-12
Counting of APU life parameters for the purpose of remaining life resource monitoring.
Main technical characteristics:
Addition and registration in the nonvolatile memory, which is built in the counter, of the following life parameters:
- total life time;
- number of start/stop cycles.
Power of the counter is realized from the switch signal of fuel supply electromagnet, which is in its turn powered from the direct-current power supply with nominal voltage 27V (rectifying installations) or from the accumulator battery with voltage 24V.
Application in the aircrafts:
- Tupolev - 334
- Tupolev - 204
- Tupolev - 214
- Beriev - 200