22-21-00
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MAINTENANCE MANUAL
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH YDM DASH NUMBERS ú
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-101 THRU -121; ú ú 04 Page 42 ú Jan 28/02
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MAINTENANCE MANUAL
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AIRPLANES WITH -122 YDM AND SUBSEQUENT ú 22-21-00
YDM DASH NUMBERS ú ú 02 Page 43 ú Jan 28/02
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MAINTENANCE MANUAL
4) AIRPLANES WITH YDM DASH NUMBERS -101 THRU -121; The IRU faultball is only reset by the IRU auto-reset or maintenance reset.
5) IRU data is declared unacceptable if: a) Two out of three IRUs have comparison faults b) An input fault and a comparison fault are detected. c) All IRUs have input faults
6) When IRU data is declared unacceptable, the yaw damper channel goes INOP and is auto-disengaged. An IRU auto-reset is generated with the airplane in-air and the yaw damper not in an INOP status. If sensor data within monitor threshold is detected for 10 seconds, the IRU fault latch is reset, provided there have been no more than four resets since the airplane was on the ground. The maintenance reset is generated by the YDM front panel RESET switch.
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FAULT ISOLATION/MAINT MANUAL
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YAW DAMPER SYSTEM
COMPONENT FIG. 102 SHT QTY ACCESS/AREA REFERENCE
ACCELEROMETER - MODAL SUPPRESSION L, M10734 1 2 1 822, AFT CARGO DOOR, AFT CARGO COMPT CEILING 22-21-05
ACCELEROMETER - MODAL SUPPRESSION R, M10735 1 2 1 822, AFT CARGO DOOR, AFT CARGO COMPT CEILING 22-21-05
CIRCUIT BREAKERS - 1 FLT COMPT, P11 *
CSEU 1L AC (OR FLT CTRL ELEC 1L AC), C1538 1 11C6 *
CSEU 1L DC (OR FLT CTRL ELEC 1L DC), C1534 1 11C7 *
CSEU 1R AC (OR FLT CTRL ELEC 1R AC), C1536 1 11G17 *
CSEU 1R DC (OR FLT CTRL ELEC 1R DC), C1531 1 11G18 *
CSEU 2L AC (OR FLT CTRL ELEC 2L AC), C1537 1 11C8 *
CSEU 2L DC (OR FLT CTRL ELEC 2L DC), C1533 1 11C9 *
CSEU 2R AC (OR FLT CTRL ELEC 2R AC), C1535 1 11G27 *
CSEU 2R DC (OR FLT CTRL ELEC 2R DC), C1532 1 11G28 *
YAW DAMPER L, C1560 1 11A18 *
MODULES - (27-09-00/101) COMPUTERS - (34-12-00/101) COMPUTERS - (31-41-00/101) LEFT POWER SUPPLY 1, M536 LEFT POWER SUPPLY 2, M537 RIGHT POWER SUPPLY 1, M538 RIGHT POWER SUPPLY 2, M539 YAW DAMPER R, C1561 EICAS L, M10181 EICAS R, M10182 AIR DATA R, M101 AIR DATA L, M100 1 11F34 *
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