A sight-viewing structure for an engine nacelle (10), including a sight glass (24) that is translucent or semi-translucent, a mounting frame (26), and a flame shield (28). The sight glass (24) allows checking of oil levels of an aircraft engine accessory gearbox within the nacelle (10) without doors and springs that can be more susceptible to fail fire testing. The mounting frame (26) has an outer side, an inner side opposite the outer side, and a frame opening (30) formed through the mounting frame (26). The frame opening (30) is covered by the sight glass (24), and the mounting frame (26) is configured for attachment to an inner surface of the engine nacelle (10) at a location with a hole (22) through the engine nacelle (10), such that the sight glass (24) can be viewed through the hole (22). A flame shield (28) may be made of composite materials and covers the inner side of the mounting frame (26) and peripheral edge regions of the sight glass (24).
FIREPROOF SIGHT GLASS WINDOW FOR ENGINE NACELLE
FEUERFESTES SCHAUGLASFENSTER FÜR TRIEBWERKSGONDEL
FENÊTRE VITRÉE IGNIFUGE POUR NACELLE DE MOTEUR
2024-10-16
Patent
Electronic Resource
English
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