https://www.resetera.com/threads/technician-accidentally-fir... here's someone claiming to be an F-16 weapons technician posting and -- they needed to do something stupid or the weight-on-wheels switch needed to malfunction.
Actually, the F-16 has a switch to override the 'weight on wheels' (WOW) safety for the weapons. It's used for doing checks and maintenance on the ground. Switch was probably flipped and it did what it was supposed to do. You can see the procedure here:
http://aviationandaccessories.tpub.com/TM-1-1510-224-10/css/...
Kinda sucks if your multi million plane gets shot down because it couldn't fire a missile because of a 50 Euro sensor malfunction...
The correct manual for Belgian F-16s will be either a GS (general system; theory of operations) or JG (job guide; step-by-step procedural instructions) technical order of the form T.O. 1F-16AM-2-x where x = [system][GS or JG]-[subsystem]-[manual].
If memory serves correct, F-16 WOW switch override is strictly an external affair and cannot be performed from the cockpit.