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COCKPIT   DOME   CIRCUIT   BREAKER   DOES   NOT   STAY   CLOSED
COCKPIT  DOME  AND  UTILITY  LIGHTS  VISUAL  CHECK - TM-55-1520-240-T-2_869

TM-55-1520-240-T-2 CH-47D Heilcopter Manual
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TM   55-1520-240-T 9-14.3  COCKPIT  DOME  AND  UTILITY  LIGHTS  OPERATIONAL  CHECK 9-14.3 INITIAL  SETUP References: TM   55-1520-240-23 Applicable    Configurations: Equipment    Condition: TM   55-1520-240-23: None Battery   Connected Electrical  Power  On Materials: Hydraulic  Power  Off None Cockpit  Dome  and  Utility  Lights  Visual  Check  Per- Personnel   Required: formed   (Task   9-14.2) Aircraft  Electrician TASK RESULT 1. 2. 3. 4. 5. 6. 7. 8. 9. Check  that  LIGHTING  COCKPIT  DOME  cir- cuit  breaker  (1)  is   closed. Set   DOME   SELECT   switch   (2)   to   WHITE. Turn  DOME  LIGHTS  control  (3)  from  OFF through   DIM   to   BRT. Turn  DOME  LIGHTS  control  (3)  to  OFF. Set   DOME   SELECT   switch   (2)   to   RED. Turn  DOME  LIGHTS  control  (3)  from  OFF through   DIM   to   BRT. Turn  DOME  LIGHTS  control  (3)  to  OFF. Set   DOME   SELECT   switch   (2)   to   OFF. Remove   pilot’s   utility   light   from   overhead panel   bracket.   Press   and   release   switch   (4). Turn  dimming  control  (5)  through  its range. Stow   pilot’s   utility   light. Perform  steps  7  and  8  with  copilot’s  utility  light. If COCKPIT DOME circuit breaker (1) is open, close it.  If  it  opens  again,  go  to  task  9-14.4. White  light  in  both  dome  lights  shall  come  on  and increase  in  brightness  as  control  (3)  is  turned  to BRT.  If  any  dome  light  is  not  lit,  go  to  task  9-14.5.  If brightness  does  not  increase,  replace  DOME  LIGHTS control  (3). Dome  lights  shall  go  out.  If  lights  are  still  on,  replace DOME LIGHTS control (3). Red  light  in  both  dome  lights  shall  come  on  and  in- crease  in  brightness  as  control  (3)  is  turned  to  BRT. If  any  dome  light  is  not  lit,  go  to  task  9-14.6.  If brightness  does  not  increase,  replace  DOME  LIGHTS control  (3). Dome  lights  shall  go  out.  If  lights  are  still  on,  replace DOME LIGHTS control (3). Utility  light  shall  blink  when  switch  (4)  is  pressed  and released.  Utility  light  shall  increase  in  brightness  as dimming  control  (5)  is  turned.  If  utility  light  does  not come  on,  go  to  task  9-14.7.  If  light  comes  on  but does  not  increase  in  brightness,  replace  utility  light. FOLLOW-ON    MAINTENANCE: TM    55-1520-240-23: Battery   Disconnected Electrical  Power  Off 9-250/(9-251    blank) Change  2







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