Patent ID: 11952143
Assignee: SAF-T-GLO LIMITED
Field: Transport (Mechanical engineering)
Classification: CPC B  F  G | IPC B  F  G

Claim 15:
16. A method of maintaining flight-worthiness of a passenger aircraft in instances of failure of an electrical emergency exit sign such that the aircraft can be flown back to a service point, the method comprising:
obtaining a luminescent emergency exit sign from storage, the luminescent emergency exit sign comprising an adhesive layer arranged to allow the luminescent emergency exit sign to be adhered to a surface;
activating the luminescent emergency exit sign;
applying the luminescent emergency exit sign to a surface in the vicinity of the failed electrical emergency exit sign such that the adhesive layer holds it in place as a replacement emergency exit sign;
completing an intended flight of the aircraft using the luminescent emergency exit sign as a required exit sign; and
servicing the aircraft to repair or replace the failed electrical emergency exit sign in advance of a next flight of the aircraft.