A misfire may occur due to faulty M81, shock tube, or primaline. If a misfire occurs, perform
the following procedures:
a. If M81 fails to fire after three attempts, replace with new M81 from M301 FPE Reload
b. If M81 functions but blasting cap on end of shock tube fails to function, check shock
(1) If shock tube has been expelled from M81 cut 3 feet from end of shock tube, replace
it with new M81 from M301 FPE Reload Kit and repeat firing procedure.
(2) If M81 fires but blasting cap in M9 fails to fire, cut 6 inches off shock tube and dis-
card. Cut a 1-foot piece off shock tube and, holding one end over palm of hand, blow
gently through other end.
(a) If a fine powder is present, shock tube has not been fired. Replace M81 and repeat
(b) If powder is not present, wait 30 minutes before approading sandbag. Cut prima-
line just forward of sandbag. Obtain and establish new ignition system using new
shock tube, M9 and M81 from M301 FPE Reload Kit.