ATA 52

We encourage that the emergency exits be checked per chapter 5 of the AMM. Removal of the exits at the 150 hour intervals is required to clean and lubricate the seals. SIL No. 37 addresses this and cautions about the fit of the exit interior trim panel. The exit door trim may not fit flush across the top. The top should not slip below the metal interior trim immediately above the hatch, as it may interfere with the emergency exit removal if not fitted correctly.