TM 55-1520-240-T Change 24     16-195 16-5.3  AN/ALE-47 COUNTERMEASURES DISPENSER SYSTEM OPERATIONAL CHECK (Continued) 16-5.3 TASK RESULT NOTE If no expendable counts or an erroneous counts Are displayed, on the CDTs the payload MAG ID Encoding pin switches S2, S3, S4 or S5 may be Set incorrectly. 16.  Press and turn payload coding pins (33) on CDTs (16) to lock-in, set payload MAG ID codes as follows. All other coding pins should be unlocked-out: CDT CODING PIN POSITIONS  MAG ID POSITION S2 S3 S4 S5     DISP #1 (37)    X O O O 1 DISP #2 (34)    O O O X 8 DISP #3 (36)    X O O O 1 DISP #4 (35)    O O O X 8 “X” = Locked (Pressed in) Coding Pin “O” = Unlocked (Out) Coding Pin 17. Set DCDU MODE switch (7) to STBY. DCDU performs initiated BIT (IBIT). A momentary illumination of the OFP (operational flight program) ####, MDF (mission data file) #### version; then   payload inventory ## ## __ ## is displayed. NOTE The CDT has a battery saver feature which If erroneous expendable counts are displayed, will turn the CDT off after approximately 20 fastening knobs may require additional tightening. minutes of inactivity. If this occurs, set CDT MODE switch (18) to OFF, then back to FIRE TEST. Confirm displayed OFP and MDF match the version   numbers of the OFP and MDF documents for your unit. If NO GO is displayed on the DCDU go to step 20. If   DISPENSE READY is displayed go to step 23. 18.  Press the following DCDU INHIBIT pushbutton LED for each switch illuminates when the switch is   switches (24):  O1, O2, CH, FL, RWR, JMR, and   depressed. MWS. If LED for any INHIBIT switch fails to illuminate, remove and replace DCDU. 19. Press and hold DCDU ENT/BIT switch until MAINTENANCE BIT, then BITSTAT=00000000 is displayed      MAINTENANCE BIT is displayed, then release on DCDU.      DCDU ENT/BIT switch to view BIT status. If DCDU does not display results, replace DCDU. 20. Press and release DCDU ENT/BIT switch to view NO CDU FAILURES is displayed on DCDU.      DCDU failures. If DCDU failures are displayed, replace DCDU. TASK RESULT 21. Press and release DCDU ENT/BIT switch to view Verify DCDU display scrolls through letters, numbers alphanumeric and symbology display test. And symbols. When display finishes scrolling, TESTING SWITCHES will be displayed. If DCDU letters, numbers and symbols are not displayed Replace DCDU. If DCDU does not display TESTING SWITCHES, replace DCDU. 22. Actuate each DCDU switch and verify DCDU a. FL switch: FLARE ON and FLARE INHIBITED display registers the engagement and dis- b. CH switch: CHAFF ON and CHAFF INHIBITED engagement of the associated switch and c. 01 switch: OTHER1 ON and OTHER1 INHIBITED discrete interfaces. d. 02 switch: OTHER2 ON and OTHER2 INHIBITED e. RWR switch: RWR ON and RWR INHIBITED f. JMR switch: JAMMER ON and JAMMER INHIBITED g. MWS switch: MWS ON and MWS INHIBITED h. JETTISON switch: JETTISON ON and JETTISON INHIBITED i. MODE switch: MODE ON and MODE INHIBITED j. MANUAL switch: MANUAL PROGRAM1, MANUAL    PROGRAM2, MANUAL PROGRAM3, MANUAL      PROGRAM4 If any switch fails during actuation, replace DCDU. 23. On Pilot’s Cyclic Grip, press and release the Verify DCDU displays MANUAL DISPENSE, and then dispense switch. Repeat for Copilots dispense displays MANUAL DISP OFF. Switch. If DCDU does not display results, go to Task 16-5.10 For pilot and 16-5.9 for copilot. 24. In cabin, press and release the crew dispense Verify DCDU displays MANUAL6 DISPENSE, and then switch. Repeat for each forward L/H and R/H, displays MANUAL6 DISP OFF. and Aft L/H and R/H crew dispense switch. If DCDU does not display results, go to Task 16-5.11. 25. On landing gear status panel, place the landing Verify DCDU displays WOW INACTIVE. gear switch to BYPASS. If DCDU does not display results, go to Task 16-5.7. 26. On landing gear status panel, place the landing Verify DCDU displays WOW ACTIVE. gear switch to NORMAL. If DCDU does not display results, go to Task 16-5.7. 27. On DCDU press and release the ENT/BIT switch. Verify payload inventory is displayed, and all payload and sensor inhibit light go out. If DCDU does not display results, replace DCDU. GO TO NEXT PAGE