TM 55-1520-240-T 16-198    Change 24 16-5.3  AN/ALE-47 COUNTERMEASURES DISPENSER SYSTEM OPERATIONAL CHECK (Continued) 16-5.3 TASK RESULT 40.  Set CDT MODE switch (18) to FIRE TEST and DATA CDTs display PASS. switch (19) to NO FIRE. If either CDT displays unfired pin numbers, check DCDU   for BIT failure messages to determine faulty LRU; refer to   TM 55-1520-240-23-10 for LRU removal and replacement   procedures. NOTE Record firing sequences as they are displayed on each CDT to compare them with the MDF pro- grammed sequences. 41.  Set CDT DATA switch (19) to SEQ to check detected Firing sequence of expendables is displayed. firing sequences with the MDF sequences. If detected fire sequence is correct go to step 32. If detected firing sequence was incorrect, analyze CDT   recorded test data and/or CMDS BIT results to isolate faulty LRU.  Refer to TM 55-1520-240-23-10 for LRU removal and replacement procedures. 42.  Set CDT DATA switch (19) to BAD GND. CDT LCD main display field displays PASS. If CDT LCD displays Exx, isolate faulty LRU or cable;   repair cable; or replace LRU per TM 55-1520-240-23-10. 43.  Set CDT DATA switch (19) to COUNT, press RESET CDTs display 00. TEST switch (21). 44.  Set DCDU MODE switch (7) to OFF, then to MAN. O1: 20   O2: 20   CH: _ _   FL: 20  is displayed on DCDU.    45.  Set DCDU MANUAL switch (6) to 2. 46.  Press and release FLARE DISP button (22) on pilot’s Expendable count on DCDU counts down by XX; cyclic stick grip (23). CDTs count up by XX. If DCDU does not indicate correct  dispense count, isolate   faulty LRU; if CDT does not indicate correct count, go to Task 16-5.10. 47.  Press and release FLARE DISP button (39) on copilot’s Expendable count on DCDU counts down by XX; cyclic stick grip (38). CDTs count up by XX. If DCDU does not indicate correct  dispense count, isolate   faulty LRU; if CDT does not indicate correct count, go to Task 16-5.9. 48. Repeat steps 39 through 41 to verify correct expendable sequence IAW MDF for each operating mode; (MAN 1   through 4) SEMI, AUTO and the aft station dispense switches (manual mode 6). TASK RESULT 49.  Set DCDU MODE switch (7) to OFF, then MAN; set O1:20    O2:20    CH:_ _    FL:20  is displayed on DCDU;      DCDU MANUAL switch (6) to 3; press RESET TEST 00 is displayed on CDTs. switch (21) on CDTs (16). If DCDU does not display full simulated payload module   quantities, check DCDU for BIT failure messages.  If no BIT failure messages are displayed, verify that CDTs are   installed correctly and powered up. 50.  Press and release FLARE DISP button (22) on pilot’s Expendable count on DCDU counts down by XX; cyclic stick grip (23). CDTs count up by XX. If DCDU does not indicate correct  dispense count, isolate   faulty LRU; if CDT does not indicate correct count, go to Task 16-5.10. 51.  Press and release FLARE DISP button (39) on copilot’s Expendable count on DCDU counts down by XX; cyclic stick grip (38). CDT LCD flare counts up by XX. If DCDU does not indicate correct  dispense count, isolate faulty LRU; if CDT does not indicate correct count, go to Task 16-5.9. 52. Repeat steps 39 through 41 to verify correct expendable sequence IAW MDF for each operating mode; (MAN 1   through 4) SEMI, AUTO and the aft station dispense switches (manual mode 6). 53.  Set DCDU MODE switch (7) to OFF, then MAN; set O1:20    O2:20    CH:_ _    FL:20  is displayed on DCDU; MANUAL switch (6) to 4; press RESET TEST switch 00 is displayed on CDTs. (21) on CDTs (16). If DCDU does not display full simulated payload module   quantities, check DCDU for BIT failure messages.  If no BIT failure messages are displayed, verify that CDTs are   installed correctly and powered up.   54.  Press and release FLARE DISP button (22) on pilot’s Expendable count on DCDU counts down by XX; cyclic stick grip (23). CDTs count up by XX. If DCDU does not indicate correct  dispense count, isolate   faulty LRU; if CDT does not indicate correct count, go to Task 16-5.10. 55.  Press and release FLARE DISP button (39) on copilot’s Expendable count on DCDU counts down by XX; cyclic stick grip (38). CDTs count up by XX. If DCDU does not indicate correct  dispense count, isolate   faulty LRU; if CDT does not indicate correct count, go to Task 16-5.9. GO TO NEXT PAGE