TM 1-1510-225-10 3B-52 Table 3B-9.  CDU Annunciations and Scratchpad Messages  (Continued) ANNUNCIATION /SP MESSAGE INITIATING CONDITION RESET MECHANISM LOCATION BLINKING NOT CLEARABLE CDU MSG ALERT 1000 FT MINIMUM Attempt to enter VNAV or alternate flight plan altitude less than 1000 ft. Clear key SP A need key Insufficient GPS SA/AS keys in selected GPS for mission duration. Clear key or entry of keys sufficient for mission duration or shortening mission duration to fit keys available. A B NET NOT FOUND Attempt to tune to have a SINCGARS or HAVE QUICK net which is not stored in the CNMS preset list. Clear key SP A no appr RAIM Active when the following conditions are true: 1.   When a transition to GPS approach mode occurs (2 nm from FAF) and the approach Predicative RAIM Availability is not available or unable to be computed. Data based GPS approach disabled or removed. A N 2.   AIM Available indicates unavailable when the MAP becomes the active waypoint. 3.   RAIM Available indicates unavailable after the 5 minute NO APPR RAIM annunciation suppression period expires. No appr vnav Insertion of a Minimum Descent Altitude (MDA) type approach into the flight plan. Clear key or GPS approach removed from flight plan. A N NO CARTRIDGE Attempt to access Data Loader Data when no cartridge is installed. Clear key SP A no gps appr Active when the following conditions are true: 1.   Within 3 nm from the database FAF or the data based MAP is the TO. 2.   Approach is enabled. Navigation mode switched to a solution with valid GPS data or data base approach disabled or (MAP not the TO and FAF in history or deleted). A N X