Aircraft Clock Standards

Standards that relate to Aircraft Clocks & Chronometers

ID Status Date Area title Description or Comments
AC 20-94 Active 4/76 FAA Digital clock installation in aircraft  
AIR-STD-10/32A Canceled 8/73   Dimensions of clock cases  
AN5726          
AN5743 REV 3 Inactive 10/96   Clock - aircraft, 1-7/8 inch dial  
ARINC 585-2 Inactive 4/78 ARINC Electronic chronometer system  
ARINC 731-3 Active 11/98 ARINC Electronic chronometer  
BS G 139 With drawn 50's? UK Simple dashboard clock for aircraft  
DEF STAN 66-30 Active 6/81 UK Chronometer, electronic, quartz Relates to Chronometer, electronic ,quartz for navigational use in all departments of the UK MOD
MIL-C-4241 Canceled 2/59 USAF Chronometer, make-break circuit, with case, type A-1  
MIL-C-5033C Canceled 12/90 USN Clock, aircraft, civil date, 24-hour dial, 2-3/4 inch  
MIL-C-6499E Canceled 9/94 USAF Clock, aircraft mechanical, type A-13A Covers the requirements for an unlighted mechanical clock having a 1-7/8 inch dial and a 1 hour elapsed time capability, designated as Clock, aircraft mechanical, Type A-13A. Specifies:

  • Type A-13A-1, having fluorescent luminescent hand and dial markings
  • Type A-13A-2, having lusterless white hand and dial markings
MIL-C-6720C Canceled 12/90 USN Clock, aircraft, elapsed time, civil date, 24-hour, 2-3/4 inch dial Covers one type of 24 hour indicating, 8 day, Aircraft clock with a 2-3/4 inch round dial, civil date, and elapsed time indicator
MIL-C-7047B Canceled 5/62 USN Clock, aircraft mechanical, 1-7/8 inch dial, elapsed time  
MIL-C-7939B Canceled 7/80 USN Clock, aircraft, 1-7/8 inch dial  
MIL-C-9196          
MIL-C-25885A Canceled 8/59 USAF Clock, aircraft, mechanical ABU-1/A Use MIL-C-6499
MIL-C-25917A Canceled 9/59 USAF Clock, aircraft, mechanical ABU-2/A  
MIL-C-25942A Canceled 6/61 USAF Clock, aircraft, mechanical ABU-3/A Use MIL-C-38207
MIL-C-26349B Canceled 4/62 USAF Clock, aircraft, mechanical ABU-5/A  
MIL-C-27298B Active 6/87 USN Clock, aircraft, mechanical ABU-9/A Covers one type of elapsed time mechanical aircraft clock, ABU-9/A
MIL-C-38207A Inactive 12/97 USAF Clock, aircraft, mechanical ABU-11/A Covers the requirements for an integrally lighted mechanical aircraft clock with a 1- hour elapsed time capability, designated ABU-11/A
MIL-C-87975 Canceled 9/94 USAF Clock, aircraft, mechanical ABU-32/A Covers the requirements for an integrally lighted mechanical aircraft clock with a 12 minute elapsed time capability, designated ABU-32/A
MIL-C-87979 Canceled 5/96 USAF Clock, aircraft, electronic Covers quartz time base, electronic, aircraft clocks which shall indicate hours, minutes and seconds for clock time and elapsed time modes in a 6 digit, 24 hour numeric display in addition to a sweep second, analog indicator
MIL-PRF-32144A Active 4/07   Clock, aircraft, electronic This specification contains the technical and performance requirements for an electronic clock. The electronic clock is intended for use in military aircraft, which may be at a fixed military base, deployed to austere forward operating locations, or naval vessels afloat. This specification provides for first article testing described herein
MS28015A Canceled 6/87 USN Clock, aircraft, civil date, 24-hour dial, 2-3/4 dial  
MS28020A Canceled 2/63 USN Clock, aircraft mechanical, 1-7/8 inch dial, elapsed time  
MS90329 Canceled 12/90 USN Clock, aircraft, elapsed time, civil date, 24-hour 2-3/4 inch dial  
MS90462B Canceled 5/67 USN Clock, aircraft, mechanical  
QPL-7047-2 Canceled 5/58 USN Clock, aircraft mechanical, 1-7/8 inch dial elapsed time  
QPL-7939-10 Canceled 8/79 USN Clock, aircraft 1-7/8 inch dial  
QPL-38207-9 Active 2/00 USAF Clock, aircraft, mechanical ABU-11/A  
STANAG-3405 Canceled 9/72 NATO Dimensions of clock cases  
Last updated 01/01/08
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