Section IV. TROUBLESHOOTING
a. Table 2-2 lists the common malfunctions which you may find during the operation or maintenance of the flyer's
protective helmet or its components. You should perform the tests/inspections and corrective actions in the order listed.
b. This manual cannot list all malfunctions that may occur, nor all tests and inspections and corrective actions. If a
malfunction is not listed or is not corrected by listed corrective actions, refer to Chapter 3, Maintenance.
c. Refer to TM 55-1660-247-12/TO 15 x 5-3-6-1 for troubleshooting procedures applicable to your Pressure-Demand
Oxygen Mask, Type MBU-12/P.
d. Refer to TM 11-5965-279-13&P for troubleshooting procedures applicable to your Headset-Microphone MK-
e. Refer to TM 9-1270-212-14&P for troubleshooting procedures applicable to your Helmet Directed Fire Control
Subsystem, XM-128 and XM-136.
f. Refer to TM 11-5855-263-10 for troubleshooting procedures applicable to your Night Vision Imaging System,
AN/AVS-6(V)1 and AN/AVS-6(V)2.
g. Be sure that your Preventive Maintenance Checks and Services have been applied before troubleshooting your