AR 40-21 is listed as current in the Army Publishing Directorate catalog (publication date 2019-06-07).

Where do I download the official AR 40-21?

The official copy is published on Army Publishing Directorate (https://armypubs.army.mil).

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AR 40-21 — MEDICAL ASPECTS OF ARMY AIRCRAFT ACCIDENT INVESTIGATION

AR 40-21 is listed as current Current
in the Army Publishing Directorate catalog as of our last index refresh (2026-07-11). Note: its publication date is 2019-06-07 — 7 years old — so check for newer interim changes before citing it.

Branch	U.S. Army
Series	AR
Publication date	2019-06-07 (7.1 years ago)
Status	Current
Proponent / OPR	TSG
Source of record	Army Publishing Directorate

Official document (Army Publishing Directorate)

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Nearby in the AR series

AR 40-1 — COMPOSITION, MISSION, AND FUNCTIONS OF THE ARMY MEDICAL DEPARTMENT Current
AR 40-10 — HEALTH HAZARD ASSESSMENT PROGRAM IN SUPPORT OF THE ARMY ACQUISITION PROCESS Current
AR 40-13 — RADIOLOGICAL ADVISORY MEDICAL TEAMS Current
AR 40-25 — NUTRITION STANDARDS AND EDUCATION {OPNAVINST 10110.1; MCO 10110.49; AFI 44–141} Current
AR 40-3 — MEDICAL, DENTAL, AND VETERINARY CARE Current

This is an unofficial index built from the public catalog. The controlling copy is always the one on Army Publishing Directorate — verify there before citing AR 40-21 in an official product.