ISO 14620-3-2021 pdf download.Space systems一Safety requirements一 Part 3: Flight safety systems.
5.4 Any launch vehicle having a stage, motor or component capable of violating the defined safety envelope shall be equipped with an FTS that interrupts the flight of the vehicle if it diverts from its predicted flight trajectory and has sufficient energy to become a threat to public safety.
5.5 All the FTSs, telemetry and tracking systems of launch vehicles shall be compatible with applicable spaceport and/or range ground equipment.
5.6 The inability to accurately ascertain the vehicle’s position shall be a criterion for stopping the launch countdown.
5.7 If the ability to accurately determine the location of the vehicle is lost after launch, this normally requires initiation of FTS action, unless otherwise specified in the mission rules or range safety operational procedures.
5.8 For launch vehicles and payloads containing radioactive materials, proof of compliance with all appropriate regulations governing radioactive materials shall be provided.
6 Flight termination system requirements
6.1 General
6.1.1 Any launch vehicle where a malfunction of the vehicle or any stage, motor, payload or component can generate an unacceptable hazard to public safety shall contain FTSs.
6.1.2 All launch vehicle stages capable of violating the defined flight safety envelope shall contain FTSs.
6.1.3 The FTS flight equipment reliability shall be not less than 0,999 or shall conform to quantitative flight safety requirements as required in Iso 14620-2, if the latter requirements are more stringent. This reliability should be established by analysis of all components and supporting test data. The reliability of FTS ground equipment (including the radio-frequency propagation path as far as the launch vehicle) shall be compatible with the reliability requirements of the flight hardware.
6.1.4 The FTS, including monitoring and checkout circuits, shall be designed to eliminate the possibility of an SFP inhibiting the function of the system or causing an undesired output of the system. This requirement shall be verified by performing an SFP analysis.
6.1.5 The FTS shall make non-propulsive all propulsive systems of the vehicle.
6.1.6 The liquid propellant system shall meet the following requirements:
a) The FTS of a liquid propellant launch vehicle shall provide engine shutdown and inhibition of further engine start. This can be the result of the destruction of each stage.
b) A rapid burning or explosion caused by the destruct capability of toxic propellants shall be initiated to consume as much propellant as possible before impact.ISO 14620-3 pdf download.