New FLIR, new procedures.

The Avenger has a new forward looking infrared receiver (FLIR), NSN 5855-01-518-8691, that is more capable and durable than the previous FLIRs--and cheaper, too. Operating it is pretty much the same, except for these points:

Installation. Before installing the new FLIR, make sure the FLIR monitor, FLIR cables, and the field of view (FOV) foot switch work. Also ensure that the vehicle and system battery power Levels are within tolerance. These checks are in TM 91440-433-24-1&2.

Operation. When the FLIR is switched from STANDBY to RUN (like after the initial 2-5 minute cooldown), there is an automatic calibration called a non-uniformity correction (NUC). During the NUC, the FLIR monitor will have a fixed image in its display. After 45 seconds, the FLIR should then operate normally. If the fixed image doesn't disappear, check the FLIR monitor, FOV foot switch, cables, and system power for problems.

Boresighting. Boresighting the new FLIR is basically the same as with the old ones. But the afocal lens of the new FLIR doesn't project forward as far as the one on the old FLIR, so you may need to shade the gap between the collimator and the FLIR if there's too much light.

The target reticle on the collimator may be much blighter when boresighting the new FLIR. You may need to adjust the main, focus and level to prevent light "blooming", where the target reticle graduations appear as a white blob on the display.

The now FLIR will be issued and turned in through the standard Army supply system.

If you have questions, contact AMCOM's Erick Arnell at DSN 788-7983/[phone] or email [e-mail]