Is this a correct title for an article, etc:
Airplane and the system of its emergency airplane-door locks
?
It seems its cannot be used in this phrase.
Which is correct/prefered for a title:
- Airplanes and the system of their emergency airplane-locks
- Airplanes and the systems of their emergency airplane-locks
- On Airplanes and the system of their emergency airplane-locks
- On an Airplane and the system of its emergency airplane-locks
- The system of emergency airplane-locks of an airplane