MIL-PRF-26139D
50B6228, 50B6230, and 50B6335.
f. One 25-foot length of 3-inch (inside diameter) flexible, pressurized air hose, in
accordance with MIL-DTL-26521, and the necessary clamps to secure the hose to the
outlet specified in 3.10.6 and to the adapters specified in item e.
g. One stethoscope for detecting cabin leakage through the skin of the aircraft. The
stethoscope shall be suitable for use at -25° F and shall be of rugged construction to
withstand hard service usage.
3.15. Accessory box. An accessory box having three separate compartments shall be provided
within the housing. One compartment shall contain the hose assemblies and fittings (installed on
the hose) specified in 3.14 a, b, c, and d; the second compartment shall contain the adapters with
gaskets specified in 3.14 e; the third compartment shall contain the stethoscope specified in 3.14
g. The box shall have a hinged cover with a hasp for possible padlocking and for holding the
cover closed.
3.16 Pressurization hose storage device. A rack, tray, or compartment shall be provided within
the tester housing to store the pressurization hose specified in 3.14 f. In addition, metal brackets
shall be provided on the exterior of the housing to permit temporary storage of all hoses without
disconnecting them from the outlets. The brackets shall be designed to retract against the housing
when not in use.
3.17 Handbook compartment. A handbook compartment shall be provided and permanently
mounted within the tester housing. The compartment interior shall be a minimum size of 10 by
12 by 4 inches.
3.18 Interchangeability. All parts having the same manufacturer's part number shall be
functionally and dimensionally interchangeable. The drawing number and part numbers shall be
structured in a manner to identify the item.
3.19 Dimensions. The length and width of the tester and housing shall be not less than the trailer
bed and shall not overhang the outline of the wheels at any point. The overall height of the tester
shall be held to the minimum consistent with good design practices. Unit shall be designed for
shipment and size and weight shall be in accordance with current industry requirements.
3.20 Cleaning, plating, and chemical films. Cleaning, plating and chemical films shall be in
accordance with acceptable, current industry practices as specified herein. The color of the tester
and the inner surfaces of exterior panels or components will be dark green, color 24052, Film
Designation LG, per FED STD 595.
4. VERIFICATION
4.1. Classification of tests. The inspection and testing of testers shall be classified as individual,
acceptance tests.
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