HEADS UP DISPLAY SYSTEM OPERATIONAL CHECK (Continued)

HEADS UP DISPLAY SYSTEM OPERATIONAL CHECK

TM-55-1520-240-T-3 CH-47D Heilcopter Manual
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TM 55-1520-240-T 16-4.3 HEADS UP DISPLAY SYSTEM OPERATIONAL CHECK (Continued) 16-4.3 TASK RESULT 5 Press and hold CCU BIT/ACK switch If one test display is incorrect, replace that to BIT, allow 20 seconds for BIT to run display unit. If both test displays are incorrect, then note that pilot and copilot displays replace the signal data converter. If both show symbol generator test mode. displays indicate incorrect type aircraft, go to Release CCU BIT/ACK switch to return task 16-4.9. display units to operating mode. 6. Refer to TM 11-5855-300-10 and If a symbol does not stop blinking when program the pilot's then the copilot's programmed, go to task 16-4.10. If PLT DCLT display. On completion of programming, will not select, go to task 16-4.11. If CPLT return CPU P-PGM/OP/CP-PGM switch DCLT will not select, go to task 16-4.12. to OP. 7. Set pilot'slc6pilot's thruster grip HUD If the pilot thruster grip HUD switch will not control switch (4) to cycle through cycle through all modes, through declutter, and four MODE/DCLT positions and check brighten or dim display, go to tasks 16-4.13; the BRT and DIM operation. 16-4.14; 16-4.15; or 16-4.16 respective tasks are 16-4.17; 16-4.18; 16-4.19; or 16-4.20. 8. On the CCU, rotate pilot's/copilot's If the pilot's display will not follow the UR or the DISPL POS control to full LIR (left/ D/U control, go to task 16-4.21 or 16-4.22 right) then D/U (down/up) positions. respectively. For the copilot, go to tasks 16- Check that the display follows the 4.23 or 16-4.24 respectively. control. 9. With the CCU P-PGMIOPICP-PGM If the MSL altitude (1) or airspeed (3) is switch in OP, set the ADJIONIOFF improperly displayed, go to task 16-4.29. If the switch to ADJ. Using the DEC/INC trim (2) is improperly displayed, go to task 16- switch, check that the data can be 4.30. If any adjustment can be make, refer to changed then set to the required TM 11-5855-30-23&P to troubleshoot the HUD. value. The MSL altitude, the pitch, then the roll are adjusted in turn. FOLLOW-ON MAINTENANCE: TM 55-1520-240-23: Remove power from HUD system Remove Electrical Power Disconnect Battery CH-47D HUD Master Mode Display END OF TASK Change 18 16-151 NOTE: VERSION NUMBER AND DATE WILL CHANGE AS SOFTWARE IS UPDATED.

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