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 RIGHT FMC INOPERATIVE - When operating in flight director mode with both F/D switches ON, LNAV and VNAV will engage. If the First Officer’s NAV source switch is selected to the L FMC or R CDU position, LNAV and VNAV will engage with any autopilot engaged. Otherwise, LNAV and VNAV will engage if the left or center is engaged or the right F/D is ON.
Procedure: After liftoff (with F/D in TO mode), use HDG SEL and FL CH modes as desired until First Officer’s NAV selector is moved to an alternate source, or left or center autopilot is engaged. Then use LNAV and VNAV as desired.
C. With a single operational FMC, during VOR approaches, one pilot must have raw data from the VOR associated with the approach displayed on the RDMI, RMI, or HSI in a VOR mode no later than the final approach fix.
 For dispatch with both FMC’s inoperative, enter airplane present position using IRS Mode Selector Panel (reference Operations Manual, Supplementary Procedures - Flight Management, Navigation).
 For long-range navigation operations with one FMC inoperative: NOTE 1: FMC NAV Source Select Switch with CDU-L and CDU-R positions must be installed
NOTE 2: One FMC, in conjunction with two IRS systems in navigation mode and two MCDU’s will meet the requirements for dispatch.
A. In addition to step 1 above, prior to takeoff accomplish the following as appropriate: 1) For an inoperative left FMC:
 Select the FMC-R position with the Captain's FMC NAV Source Select Switch to load data from the right FMC into the left CDU.
NOTE: The FMC switch should remain in this position for at least one minute after flight planning is completed or after any flight plan modifications prior to takeoff.
 After a minimum of one minute, select the CDU-L position with the Captain's FMC NAV Source Select switch.
 Observe that Captain’s EHSI Map display changes to a simplified route display without normal navigation database symbology. This confirms availability of the Alternate Navigation system.
 Prior to takeoff, select the FMC-R position with the Captain’s FMC NAV Source Select Switch.
 
2) For an inoperative right FMC:
 Select the FMC-L position with the First Officer's FMC NAV Source Select Switch to load data from the left FMC into the right CDU.
NOTE: The FMC switch should remain in this position for at least one minute after flight planning is completed or after any flight plan modifications prior to takeoff.
 After a minimum of one minute, select the CDU-R position with the First Officer's FMC NAV Source Select switch.
 Observe that First Officer’s EHSI Map display changes to a simplified route display without normal navigation database symbology. This confirms availability of the Alternate Navigation system.
 Prior to takeoff, select the FMC-L position with the First Officer’s FMC NAV Source Select Switch.
4. For dispatch with Navigation Databases out of currency, observe MEL restrictions.
　
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