MIL-PRF-27197D, PERFORMANCE SPECIFICATION: INDICATOR, AIRSPEED, MACH NUMBER AND MAXIMUM ALLOWABLE SPEED (24-NOV-1997) [SUPERSEDING MIL-I-27197C]

MIL-PRF-27197D, PERFORMANCE SPECIFICATION: INDICATOR, AIRSPEED, MACH NUMBER AND MAXIMUM ALLOWABLE SPEED (24-NOV-1997) [SUPERSEDING MIL-I-27197C]., This specification covers nonlighted and integrally lighted combination indicated airspeed (IAS) and mach number indicators. 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; and AVU-8C/A ME-4 - Nonlighted, Dial Fluorescent, Luminescent Material Conforming to AF drawing 8988994.