If installed, any emergency stores release handle (ESRH) or master armament safety switch (MASS) must be disabled. Both must be disabled and disconnected from all systems. Weapon related buttons and switches must also be disabled and disconnected from all systems. Selection of all simulated failure modes from the rear cockpit (instructor position) must be disabled.
Verify it yourself: the eyeball above opens the exact page of Order 8130.2M with this limitation highlighted.
Does this one apply to your aircraft?
AWCReady decides limitation 39 for you — from the aircraft and the 14 CFR 21.191 purpose.
Not every limitation goes on every aircraft. AWCReady gates each one against the airframe’s attributes and certification basis, asks only the questions that matter in plain language, and assembles a review-ready package.
This is a free reference reproducing public-domain text from FAA Order 8130.2M (the MOSAIC revision that superseded 8130.2L). AWCReady is not affiliated with or endorsed by the FAA. The limitations an aircraft actually receives are prescribed by the FAA on FAA Form 8130-7 — AWCReady prepares and organizes; the FAA determines every outcome.