A rubber seal was suspected of failing, causing the problem.

怀疑是橡胶密封失效导致了问题。

There is  also a rubber seal around the fuselage opening.

机身开口周围还有一个橡胶密封圈。

He goes over to the window and, with his back to the room, tugs at the latch as if to check it. Pokes the rubber seal.

他走到窗前，背对房间摇摇把手，捅捅密封毡。