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5-1.1   CENTRIFUGAL   DROOP   STOP   VISUAL   CHECK
5-1.2   CENTRIFUGAL   DROOP   STOP   OPERATIONAL   CHECK

TM-55-1520-240-T-1 CH-47D Heilcopter Manual
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TM 55-1520-240-T 5-1.1   CENTRIFUGAL   DROOP   STOP   VISUAL   CHECK   (Continued) TASK RESULT TASK RESULT Rotor   blades   can   seriously   injure personnel.  Make  sure  area  around helicopter   is   clear   of   personnel before  turning  blades. NOTE Blade  for  centrifugal  droop  stop  to  be checked  must  be  positioned  over fuselage. 1.  Position   blade   (1)   over   fuselage   (2).   Con- nect  tiedown  line  (3)  to  one  forward blade. 2.  Have   helpers   lift  blade  (1)   until   fixed   droop stop  (4)  on  pitch  shaft  (5)  is  clear  of interposer  block  (6).  Support   blade. Balancing   arms   must   move   freely when   blade   is   raised.   Fuselage can  be  damaged  if  there  is  in- terference   with   balancing   arm operation. 3.  Move   balancing   arm   (7)   outward   as  far  as There  shall  be  no  binding  felt  when  balance  arm it  will  go. (7)  is  moved.  Spring  (8)  shall  be  clear  of  other parts.  There  shall  be  no  interference  with  spring operation.  There  shall  be  no  interference  with interposer  block  (6).  If  there  is  interference  or binding,   refer   to   TM   55-1520-240-23. Do   not   lower   rotary   wing   blade without  warning  personnel  work- ing  on  droop  stops.  Personnel  can be  injured  if  blade  is  lowered  sud- denly. 5-1.1 4.  Let  balancing  arm  (7)  slowly  return  to hub   (9).   Have   helpers   lower   blade   (1) slowly  until  fixed  droop  stop  (4)  rests  against interposer  block  (6). 5.  Repeat  steps  1  through  7  on  remaining  two aft  rotor  blades. FOLLOW-ON   MAINTENANCE: TM   55-1520-240-23: Remove  tiedown  Iine  on  forward  blade. Close  aft  pylon  work  platform. END  OF  TASK 5-3







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