Can a chest strap from the restraint kit be used if there is no seat belt extension available?

The use of a chest strap from the restraint kit is not permissible when there is no seat belt extension available. This is because the chest strap is not designed to replace or serve as a substitute for a proper seat belt. Safety regulations require that passengers are secured with seat belts specifically designed for aircraft use. The chest strap does not provide the same level of safety or restraint capability as the seat belt, which could lead to potential injury during turbulence or in the event of an emergency landing.

Airline policies and safety protocols mandate that all passengers must be secured using standard equipment, such as seat belts, to ensure their safety. Therefore, in the absence of a seat belt extension, it would be inappropriate to utilize a chest strap, as it does not comply with safety standards for passenger restraint in commercial aviation.