As with all a/c certain components have life times, expressed in hours in use and calendar time between overhaul. The YAK series of aircraft are no different. The CAA publication CAP 543 is a very convenient means of recording these. The example shown below is not an exhaustive list but those on page one only!!
All a/c coming to the register or those renewing Permits to fly must have this document raised.
| Description | Part Number | Life Limit hr’s/years |
| Propeller | V530TA-D35 | 500/6 |
| Air Bottle | LM-375a-11-50 | -/5 |
| Air Bottle | LM-375a-3-50 | -/5 |
| Speed Indicator | US-450K | 1000/5 |
| Meter | AM-9S | 2000/5 |
| Vacuum Pressure Gauge | MV-16K | 1500/6 |
| Cylindrical Thermometers | TTT-13 | 6000/5 |
| Fuel Pressure Transducers | P-1B | 1000/4 |
| Oil Pressure Transducers | PM-15B | 1000/4 |
| Bottles Pressure Gauge | 2M-80K | 1000/4 |
| Flexible pipes | as fitted* | -/6 |
The above life’s are times between, check calibration, OH or test.
Propeller overhaul is £3450 GBP, pipes £65 each with 26 fitted on the YAK 52, 20 on YAK 50 and 32 on YAK 18T.
Remaining life items can be accomplished within 6 hours testing and works.
The above is not a definitive list, refer to OEM documentation.