Technical data

TM 9-1005-319-23&P 0004
0004-1/2 blank
FIELD MAINTENANCE
TROUBLESHOOTING INDEX
GENERAL
Field level troubleshooting information is provided for locating and correcting most of the operating troubles
which may develop in the M16A2, M16A3, M16A4 rifle, M4/M4A1 carbine. Each malfunction for the
individual part or assembly is followed by a list of tests or inspections which will help you to determine the
corrective actions in the order listed.
This manual cannot list all malfunctions that may occur, or all tests or inspections and corrective actions. If
a malfunction is not listed or is not corrected by listed corrective actions, see individual repair sections in the
maintenance procedures for each major assembly.
See the troubleshooting table (WP 0005) for malfunctions, tests, and corrective actions. The symptom index
is provided for a quick reference to the malfunctions covered in the table.
MALFUNCTION/SYMPTOM INDEX
Symptom
Work Package - Page
Bolt assembly fails to lock to rear after firing last round............................................................. 0005-21
Failure of magazine to lock in rifle/carbine................................................................................... 0005-1
Failure to chamber.......................................................................................................................... 0005-3
Failure to cock ................................................................................................................................. 0005-10
Failure to cycle with selector lever set on AUTO (M16A3 and M4A1 only)................................ 0005-18
Failure to cycle with selector lever set on BURST (M16A2/M16A4 and M4 only) ..................... 0005-16
Failure to eject................................................................................................................................. 0005-9
Failure to extract............................................................................................................................. 0005-8
Failure to feed ................................................................................................................................. 0005-2
Failure to fire................................................................................................................................... 0005-5
Failure to lock.................................................................................................................................. 0005-4
Failure to unlock ............................................................................................................................. 0005-8
Fires two rounds with one pull of trigger with selector lever set on SEMI (double firing)........ 0005-18
Fires with selector lever on SAFE or when trigger is released with selector lever on SEMI .... 0005-20
Hammer pin "walks" ....................................................................................................................... 0005-20
Rifle/carbine cannot be zeroed........................................................................................................ 0005-14
Short recoil ...................................................................................................................................... 0005-12
END OF WORK PACKAGE