COMPONENT MAINTENANCE MANUAL WITH ILLUSTRATED PARTS LIST  FLAP POWER UNIT PART NUMBER: 677101 Series  SINGLE VOLUME CMM MOOG Aircraft Group Specification Manual, Publication 20-00-00 27-50-05 Electronic Control Unit Pt No 663900200 27-50-28 Ball Screw Actuator Pt Nos 677001001,677001002,677001003, 677001004, 677001005 27-50-30 Torque Limiter (Inboard) Pt Nos 677201005,677201008 27-50-31 Torque Limiter (Outboard) Pt Nos 677201006,677201007 27-50-32 Transverse Transmission System Pt No 677701002 27-50-33 Flexible Down Drive Pt Nos 677702003 677702004