results in a minimum time flight.
Entry of a company route on RTE page causes any company stored value of cost
index to be automatically displayed. A manual entry has priority.
INDEX
Push – displays the INIT/REF INDEX page.
Trip/Cruise Altitude (TRIP/CRZ ALT)
Trip altitude is automatically computed and displayed whenever entries have been
made for the ORIGIN, DEST, GROSS WT, and COST INDEX. Otherwise, the
field is blank.
Trip altitude is the predicted minimum cost altitude determined by operator
constraints. Provides crew a reference for selecting a planned cruise altitude.
Cruise altitude is required.
Enter the cruise altitude for the route.
Automatically displays this cruise altitude on the CLB, CRZ, and RTE Legs
pages.
Cruise Wind (CRZ WIND)
Cruise wind entry provides input to optimize FMC calculations.
Enter the forecast cruise wind.
Entry is propagated onto the RTE DATA page.
If no entry made, the FMC assumes zero wind for preflight predictions.
ISA Deviation (ISA DEV)
YA686 - YA722, YC153, YC154, YK101 - YK104
ISA deviation entry provides input to optimize FMC calculations.
Entry causes T/C OAT to be computed and displayed.
Enter ISA deviation for top of climb altitude.
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Flight Management, Navigation -FMC Preflight 737 Flight Crew Operations Manual
If no entry made, FMC assumes zero deviation.
Top of Climb Outside Air Temperature (T/C OAT) YA613, YA626, YA801 - YA809, YC411 - YD655
T/C OAT entry provides input to optimize FMC calculations.
Entry causes ISA DEV to be computed and displayed.
Enter top of climb OAT.
If no entry made, FMC assumes ISA value.
Top of Climb Outside Air Temperature (T/C OAT) YA686 - YA722, YC153, YC154, YK101 - YK104
T/C OAT entry provides input to optimize FMC calculations.
Entry causes ISA DEV to be computed and displayed.
Enter top of climb OAT.
If no entry made, FMC assumes ISA value.
Transition Altitude (TRANS ALT)
YA613, YA626, YA801 - YA809, YC411 - YD655
Displays 18,000 feet at FMC power up.
Changes automatically after selecting a departure procedure with a different
transition altitude.
Manual entry has priority.
Transition Altitude (TRANS ALT)
YA686 - YA722, YC153, YC154, YK101 - YK104
Displays 18,000 feet at FMC power up.
Changes automatically after selecting a departure procedure with a different
transition altitude.
Manual entry has priority.
PERF INIT REQUEST YA613, YA626, YA801 - YA809, YC411 - YD655
Push – transmits a data link request for a PERF INIT uplink
N1 LIMIT
Push – displays the N1 LIMIT page.
Copyright . The Boeing Company. See title page for details.
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Flight Management, Navigation -FMC Preflight 737 Flight Crew Operations Manual
Performance Limits Page
The performance limits page allows the entry of performance limits affecting RTA and ECON calculations.
YA686 - YA722, YC153, YC154, YK101 - YK104
Copyright . The Boeing Company. See title page for details.
Flight Management, Navigation -FMC Preflight 737 Flight Crew Operations Manual
YA613, YA626, YA801 - YA809, YC411 - YD655
TIME ERROR TOLERANCE
Used during RTA calculations to establish a boundary on computed speeds.
Valid entry range is from 5 to 30 seconds.
Default value is 30 seconds and is displayed in small font.
Minimum Speed/Maximum Speed (MIN SPD/MAX SPD)
Establishes lower and upper speed limits for each phase of flight.
Default is 100/.400 for lower limit and 340/.820 for upper limit. Default values are
displayed in small font and entered values are displayed in large font.
Either CAS or Mach can be entered.
Limits both RTA and ECON modes in flight.
INDEX
Push – selects INIT /REF INDEX page.
Copyright . The Boeing Company. See title page for details.
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Flight Management, Navigation -FMC Preflight 737 Flight Crew Operations Manual
Required Time of Arrival (RTA)
Push – selects RTA PROGRESS page.
PERF LIM REPORT YA613, YA626, YA801 - YA809, YC411 - YD655
Push – transmits displayed performance limits to ground station.
PERF LIM REQUEST YA613, YA626, YA801 - YA809, YC411 - YD655
Push – transmits a data link request for a performance limits uplink.
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