MIL-STD-2088 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.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29 - 30 - 31 - 32 - 33 - 34 - 35 - 36 - 37 - 38 - 39 - 40 - 41 - 42 - 43 - 44 - 45 - 46 - 47 - 48 - 49 - 50 - 51 - 52

MIL-STD-2088B

w/CHANGE 1

4.3.10 Environmental and service conditions. The BRU shall meet the environmental requirements of MIL-STD-810 and MIL-T-7743 as applicable, and shall function under any or all combinations of the following general operating conditions:

a. Altitude: From sea level to 70,000 feet.

b. Temperature: From -70 to +200° F. Transient temperatures are to be determined by the applicable aircraft detail specification.

c. Humidity: Under all conditions of relative humidity at temperatures from -70 to +200° F. d. High-g, vibration, and shock: Under all conditions of high-g, vibration, and shock that

are present in the aircraft during service operation.

e. Contaminants: Under all conditions of service or storage.

4.3.11 Maintainability. The only scheduled maintenance the BRU shall require is preflight and post flight checkout and cleaning and the replacement of consumable items and associated services. The BRU shall be designed with sufficient simplicity to permit adjustments, repairs,

and replacement of consumable goods and with component accessibility that requires a minimum of maintenance effort and facilities at all maintenance levels. The design shall provide for ease

of assembly and disassembly with a minimal need for removal of hardware and special tools, test facilities and other support equipment for servicing. Design modularity of components shall be maximized for ease of replacement with minimum requirements for special skills. The module replacement concept shall be employed.

4.3.11.1 Maximum maintenance time. With the BRU removed from the aircraft, the design shall provide for a mean-time-to-repair (MTTR) the BRU of one hour and a two hour maximum to include fault isolation to the component level, replacement of the failed component, and checkout. Note: Maximum maintenance time applies at the 95th percentile.

4.3.11.2 Ejector system maintainability.

4.3.11.2.1 Pyrotechnic BRU. If impulse cartridges are used as release and ejection energy sources, the BRU design shall provide for:

a. Internal breech cleaning without removal of BRU assembly from the aircraft and without the use of special support equipment. BRU breech component removal shall be minimized to facilitate cleaning at the organizational maintenance level.

b. Breech installation and removal with a minimum of maintenance effort.