MIL-PRF-27197E
This specification is approved for use by all Departments and Agencies of the Department of
Defense.
1. SCOPE
1.1 Scope. This specification covers nonlighted and integrally lighted combination indicated
airspeed (IAS) and mach number indicators.
1.2 Classification. Indicators will be of the following classifications as specified (see 6.2).
AVU-8B/A
Improved Dial, and Cover Glass Coated with Multilayer
Anti-reflection Coating of High Efficiency
AVU-8C/A
Cover Glass Coated with Multi-layer Anti-reflection Coating of
High Efficiency and with 3/8 Inch Static and 1/4 Inch Pitot Tubing
Connectors
ME-4
Nonlighted, Dial Fluorescent, Luminescent Material Conforming
to AF drawing 8988994.
2. APPLICABLE DOCUMENTS
2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this
specification. This section does not include documents cited in other sections of this specification or
recommended for additional information or as examples. While every effort has been made to
ensure the completeness of these lists, document users are cautioned that they must meet all specified
requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are
listed.
2.2 Government documents.
2.2.1 Specifications, standards, and handbooks. The following specifications, standards and
handbooks form a part of this document to the extent specified herein. Unless otherwise
specified, the issues of these documents are those cited in the solicitation or contract.
FEDERAL STANDARDS
FED-STD-595/36595 -
Gray, Flat or Lusterless
FED-STD-595/37038 -
Miscellaneous, Flat or Lusterless
FED-STD-595/37875 -
Miscellaneous, Flat or Lusterless
DEPARTMENT OF DEFENSE SPECIFICATIONS
MIL-C-14806
-
Coating, Reflection Reducing, for Instrument Cover
Glasses and Lighting Wedges (for guidance only)
MS28105
-
Cover Glass, Aircraft Instrument Dial
MS33558
-
Numeral and Letters, Aircraft Instrument Dial, Standard
Form of
2
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