TM 55-6930-212-10 Table 7-2.  Simulated Malfunction Details - Continued Method of Indications and effects on Effects sensed by trainee introduction related systems as presented if corrective action is Malfunction by instructor to the instructor and trainee not taken ILS receiver 319 If tuned to a valid ILS: ILS navigational system 1. LOC flag appears in ID-2103. inoperative. 2. Glideslope (G/S) flag appears in ID-2103. 3. Horizontal and vertical needles in ID-2103 center. 4. Station ident is disabled. CRS/LOC needle 320 If a valid course (CRS) or LOC is Vertical needle in ID-2103 oversensitive tuned. vertical needle in ID-2103 becomes twice as sensi- becomes twice as sensitive (i.e tive. one dot true equals two dots indicated). CRS/LOC needle 321 Vertical needle in ID-2103 All other CRS/LOC indica- inoperative centers. tors are not affected. Glideslope needle 322 Horizontal needle in ID-2103 No valid glideslope inoperative centers. indication. PLT HSI No. 1 323 PLT HSI pointer No. 1 oscillates Invalid Doppler station Doppler pointer ±20°from station bearing. bearing. oscillates PLT HSI No. 2 324 PLT HSI pointer No. 2 oscillates Invalid VOR/ADF station VOR/ADF pointer ±20°  from station. bearing. oscillates PLT HSI card 325 PLT HSI compass card precesses PLT HSI compass card pre- excitation loss at a rate of 150 per hour. cesses. PLT HSI card 326 PLT HSI compass card oscillates PLT HSI compass card erratic ±5°  from magnetic heading. erratic. 7-8