MIL-STD-2088-SUP-2 Bomb Rack Unit BRU, Single Store, AircraftThis standard establishes the general guidelines and criteria for the design and development of a single store bomb rack unit BRU for carriage and release of airborne stores excluding air-to-air missiles from fixed wing and rotary wing aircraft using a single suspension point or suspension points spaced at 14 or 30 inches. This standard addresses detailed requirements for gravity non-ejected, pyrotechnic, hydraulic, and pneumatic powered BRUs. Mechanical aircraft armament interoperable interfaces are incorporated to enhance cross utilization and servicing capabilities between military aircraft and aircraft stores see 3.1 of all services of the Department of Defense DoD and North Atlantic Treaty Organization NATO nations.

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MIL-STD-2088B

c. It shall be possible to install/remove the vessel regardless of its pressurization status.

d. In the case where the above requirement c is not fulfilled, it shall not be possible to install/remove the vessel unless its internal pressure has been relieved.

4.3.11.3 Ejector system component maintenance time.

4.3.11.3.1 Pyrotechnic ejection. The total servicing time for the cleaning of designated BRU ejector components, related to firing, should be 0.33 man-hour (20 man-minutes) maximum (see 4.3.11.4.1.1). If cartridges are employed, the maximum time for removal or installation of cartridges shall be not greater than 2 man-minutes per cartridge. Items requiring only periodic replacement, such as screens, filters, and/or desiccant canisters are not considered within this cleaning time constraint, but shall be removable/replaceable in 0.50 man-hour (30 man-minutes) maximum.

4.3.11.3.2 Pneumatic or hydraulic ejection. The time needed to charge a pressure vessel shall be stated by the procuring activity, differentiating between:

a. Aircraft on ground (with internal pressure generation) b. Aircraft on ground (with external pressure generation) c. Aircraft in flight (with internal pressure generation)

If a removable reservoir or accumulator is used, the procuring activity shall specify the maximum time for vessel removal or installation (shall be not greater than 4 man-minutes).

4.3.11.4 Maintenance plan. The BRU shall be designed to be maintained at the organizational and intermediate levels of maintenance.

4.3.11.4.1 Organizational maintenance. Maintenance tasks performed at this level will be confined primarily to servicing and checkout of the BRU and shall be performed on a day-to-day basis.

4.3.11.4.1.1 Organizational maintenance tasks. Design shall allow for maintenance at this level to consist of the following:

a. Preflight and post-flight operations such as visual inspection, cleaning, servicing, and mechanical checkout. The ejector system shall not require cleaning or servicing prior to 50 ejections or 30 days whichever occurs first.