TM 1-1510-218-10   3C-73 Table 3C-15.  CDU Annunciations and Scratchpad Messages  (Continued) ANNUNCIATION / SP MESSAGE INITIATING CONDITION RESET MECHANISM LOCATION BLINKING NOT CLEARABLE CDU MSG ALERT MAX   PTRNS   IN FPLN Attempt    to    insert    more than  20  patterns  into  the flight plan. Clear key. SP A 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    that    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. 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. Data-based GPS approach disabled or removed. A N 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