Air intake structure for an airplane engine

The frame (20) has an intermediate portion (28) that acts as an inflection zone as curvature between the portion and an inner end portion (20i) is not null. Height (H) of the frame is defined between an outer end portion (20e) and a normal projection of the portion (20i). The defined height reduces when the frame is compressed by a force comprising a component which is perpendicular to direction of the portion (20i). An independent claim is also included for an air inlet structure for an aircraft engine.