Abstract: An avionics unit assembly for an aircraft can include an avionics unit (e.g., an underwater locator device, “ULD”), and a battery to power the avionics unit. The avionics unit assembly can further include a housing that encases the avionics unit and the battery. The housing includes a vent port for exhausting an emission from the housing during a failure of the avionics unit. The avionics unit assembly can further include one or more of a suppressor that filters the emission, a shield element that is resistant to chemical and/or thermal effects of the emission, and a bracket for mounting the avionics unit to a surface. A method integrating the avionics unit assembly onto a forward aircraft bulkhead at a mount location under an aircraft radome and for manufacturing the avionics unit, and an aircraft including the avionics unit are also described.

Abstract: A housing assembly forms a fixed disk drive module for a low profile fixed disk drive shock-mounted therein. A frame defines front and a rear endwalls and two sidewalls. Each sidewall defines on one edge a row of enclosed cover slots having receiving portions and latching portions and on the other edge a row of open cover slot openings including entry portions and latching portions. A top cover and a bottom cover each include two peripheral flanges each defining a series of locking tab formations, one series being sized and aligned to mate in a hinging relation with corresponding ones of the enclosed cover slots and the other series to enter the open cover slot openings as the top cover is rotated toward the frame. The locking tab formations of the covers are adapted to enter and engage the latching portions as the covers are longitudinally displaced relative to the frame to an enclosure position.