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Data updated: 26 Feb 2026.
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Document ID:
MIL-A-81403
Scroll down to access document images
Overview
Title:
Altimeter-Encoder, AAU-21/A (No S/S Document)
Scope:
This specification covers the requirement for one type of counter-drum-pointer integrally lighted self-contained altimeter encoder (indicator) having a range of -1,000 to +38,000 feet and a 115V AC, 400 hertz servo driven encoder.
Status:
Canceled
Cancellation Date:
29-MAY-2014
FSC/Area:
6610
Doc Category:
Detail Specification
Responsibilities
Lead Standardization Activity:
71
Air Force Sustainment Center - Oklahoma City
Preparing Activity:
71
Air Force Sustainment Center - Oklahoma City
Coordination:
Limited
Air Force Custodian:
71
Air Force Sustainment Center - Oklahoma City
Amendments to military specifications or specification sheets issued after August 1, 2003 are incorporated in the modified document.
Revision History
Click on column headings for a description of column content.
Media
Document Part Description
Dist Stmt
Document Date
Pages
Size
Notice 3 - Cancellation
A
29-MAY-2014
1
12.1 KB
Notice 2 - Validation
A
05-NOV-2008
1
1.9 KB
Notice 1 - Inactivation
A
01-JAN-1996
1
19.3 KB
Amendment 3
A
17-JUN-1991
5
364.7 KB
Amendment 2
A
18-FEB-1986
4
250.8 KB
Base Document
A
15-JUN-1967
33
1609.6 KB
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WARNING: UNAUTHORIZED ACCESS TO THIS UNITED STATES GOVERNMENT COMPUTER SYSTEM AND SOFTWARE IS PROHIBITED BY PUBLIC LAW 99-474 (THE COMPUTER FRAUD AND ABUSE ACT OF 1986) AND CAN RESULT IN ADMINISTRATIVE, DISCIPLINARY OR CRIMINAL PROCEEDINGS.