Personal Floatation Device Buoyancy Testing The personal flotation device test is an 8-hour test to measure the net buoyancy force of personal flotation devices used in aircraft to show compliance with the requirements of Technical Standard Orders TSO-C13 and TSO-C72. All seat cushions, including seat cushions that double as a personal flotation device, may also be required to meet the fireblock test requirements of Appendix F, Part II of Federal Aviation Regulation (FAR) Part 25. Oil Burner for Seat Cushion Request Information Request Testing