MIL-PRF-38135C(USAF)
(Application for copies should be addressed to American Society for Testing and Materials, 100
Barr Harbor Drive, West Conshohocken, PA 19428-2959.)
RADIO TECHNICAL COMMISSION FOR AERONAUTICS (RTCA)
RTCA/DO-160
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Environmental Conditions and Test Procedures for Airborne
Equipment
(Application for copies should be addressed to RTCA Inc., 1140 Connecticut Avenue, NW, Suite
1020, Washington, DC 20036-4001.)
2.4 Order of precedence. In the event of a conflict between the text of this document and the
references cited herein, the text of this document takes precedence. Nothing in this document,
however, supersedes applicable laws and regulations unless a specific exemption has been
obtained.
3. REQUIREMENTS
3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in
accordance with 4.2.
3.2 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or
environmentally preferable materials should be used to the maximum extent possible provided that
the material meets or exceeds the operational and maintenance requirements, and promotes
economically advantageous life cycle cost.
3.3 Materials. All materials shall be suitably treated to resist corrosion due to electrolytic
decomposition, fungus, salt spray, and any other atmospheric condition that may be encountered
during operational use or storage. Non-magnetic materials shall be used, where feasible. The use
of toxic chemicals, hazardous substances, or ozone depleting chemicals shall be avoided,
whenever feasible.
3.4 Interface.
3.4.1 Case. The case shall conform to MS33638 for the 2-inch nominal size except as shown on
figure 1. The bezel and that part of the case visible from the cockpit side of the instrument panel
shall be finished in lusterless black, color number 37038 of FED-STD-595. The pitot and static
pressure bosses shall be marked with a P and an S as shown in figure 1.
3.4.2 Cover glass. The cover glass shall conform to MS28105-7 and shall be sealed into the
bezel.
3.4.3 Reflection reducing coating. The cover glass surface shall be coated to reduce reflection
according to MIL-C-14806.
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