What was found
CLIMBING THROUGH 7,000 FT, PITCH TRIM INDICATION HAD DASHES & POINTER DISAPPEARED. AFTER INDICATIONS RETURNED NORMALLY. THE AUTO PILOT DISCONNECTED APPROX 3 TIMES & THE PITCH TRIM DASHES REAPPEARED. OBSERVED FAULT CODE 274M0700. TROUBLE SHOT IAW FIM TASK 27-43-00-810-821-A & 27-43-00-810-820A. R & R HORIZONTAL STABILIZER CONTROL UNIT. PERFORMED HORIZONTAL STABILIZER ELECTRICAL & ELECTRONIC OPERATIONAL TEST. OPERATIONS CHECKED GOOD IAW AMM CHAPTER 27-40-01, 27-40-00, REF ITEM 2 LOG PAGE 3885849 FOR OPERATIONAL CHECK OF AUTOPILOT SYS.