TM 55-1520-240-T 5-2.7   NO   FWD   LATERAL   OR   AFT   LATERAL   INDICATION   ON   IPS   INDICATOR   (Continued) 5-2.7 INSTALL  FWD  ACCELEROME- TER BLOCK. DISCONNECT BLOCK PLUG 138P2. JUMPER PINS A AND D. DISCONNECT VIBREX BLANCER PLUG FROM BLADE TRACK RECEPTACLE 138J1 CHECK CONTINUITY BE- TWEEN  RECEPTACLE  138J1 LOCATE SHORT ON WIRES W673-179-22, W673-178-22, W673-177-22   BLU,   W673-170- 22  BLU,  OR  W673-169-22  RED AND SHIELD BETWEEN PLUG 300P47 AND BLADE TRACK RE- CEPTACLE 138J1. REPAIR OR REPLACE  WIRE  AS  REQUIRED. REMOVE FWD ACCELEROME- TER BLOCK. TEST LATERAL ACCELERMOETER AND WIRES (TM   55-4920-402-13&P).   DID ACCELEROMETER  BLOCK CHECK GOOD? REMOVE JUMPER. DISCONNECT PLUG  300P47  AT  STA  105. CHECK CONTINUITY ON BLADE RECEPTACLE  138J1  BETWEEN PINS R AND F, G, AND H. IS CONTINUITY PRESENT? DID IPS  METER  POINTER  MOVE UPSCALE AND NOT RETURN TO ZERO  WHEN  ROTARY  SWITCH SET TO  AFT   LATERAL? IS 28VDC  POWER  INDICATOR ON STROBEX LIT? PINS F AND H. IS CONTINUITY PRESENT? REPAIR OR REPLACE ACCELER- OMETER BLOCK AS REQUIRED. REFER TO TROUBLE SYMPTOM TASK  5-2.5. REMOVE JUMPER. LOCATE OPEN  IN  WIRES  W673-179-22, W673-177-22   BLU,   W673-169- 22  RED,  W639-418-20  BLU,  OR W639-415-20  RED,  BETWEEN FWD ACCELEROMETER PLUG 138P2 AND BLADE TRACK RE- CEPTACLE  138J1  REPAIR  OR REPLACE WIRE AS REQUIRED. LOCATE SHORT ON WIRES W639-415-20    RED,    W639-416- 20  BLU,  OR  W639-418-20  BLU AND  SHIELD  BETWEEN  RECEP- TACLE 300J47 AND PLUG 138P2. REPAIR OR REPLACE WIRE  AS  REQUIRED. CHECK FOR CONTINUITY ON RECEPTACLE  300J47  AT  STA 105 BETWEEN PINS 16 AND 22,   23,   AND   25.   IS   Continui- ty  PRESENT? TROUBLESHOOT VIBREX BAL- ANCER  (TM  55-4920-402  - INSTALL AFT ACCELEROMETER BLOCK. DISCONNECT BLOCK PLUG 138P4. JUMPER PINS A AND D. DISCONNECT VIBREX EQUIPMENT  BLADE  TRACK RECEPTACLE  138J1  CHECK CONTINUITY BETWEEN RECEP- TACLE  13BJ1 PINS F AND K. IS CONTINUITY PRESENT? LOCATE SHORT ON WIRES W673-178-22, W673-179-22. W673-186-22   BLU,   W697-163- 22  RED,  W697-164-22  BLU,  OR W697-166-22  BLU  AND  SHIELD BETWEEN PLUG 300P52 AND BLADE  TRACK  RECEPTACLE 138J1. REPAIR OR REPLACE WIRE AS REQUIRED. REMOVE JUMPER. DISCONNECT PLUG  300P52  AT  STA  460. CHECK  CONTINUITY  ON  BLADE TRACK  RECEPTACLE  PINS  R AND  G,  F,  AND  K.  IS  Continui- ty PRESENT? REMOVE AFT ACCELEROMETER BLOCK.  TEST  LATERAL  ACCEL- EROMETER AND WIRING (TM 55-4920-402-13&P).   DID   AC- CELEROMETER BLOCK CHECK OK? DISCONNECT PLUG 300P44. CHECK CONTINUITY BETWEEN PLUG 300P44 PINS 55 AND 51, 52 AND 54. IS CONTINUITY PRESENT? REPAIR OR REPLACE ACCELER- OMETER BLOCK AS REQUIRED. LOCATE SHORT ON WIRES CHECK FOR CONTINUITY ON W528-64-20   RED,   W528-65-20 REPLACE VIBREX BALANCER RECEPTACLE  300J44  BETWEEN BLU,  OR  528-67-20  BLU  AND PINS  55  AND  51,  52  AND  54. GROUND BETWEEN RECEPTA- IS CONTINUITY PRESENT? CLE  300J44  AND  PLUG  138P4. REPAIR OR REPLACE WIRE AS REQUIRED. END OF TASK Change  5 5-15