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737.1 737 FMC U10.6 Changes Mark Peterson Avionics-FMC Boeing Commercial Airplanes May 2004 The Boeing Company 737.2 737 FMC • Remaining automatic switches to speed descent mode are removed. Selecting the SPEED prompt is the only way to get into the SPEED descent mode • “Geometric” Path descent is now basic, not optional • Switch to path on “point to point” legs • Nuisance VNAV DISCONNECT message during flare and landing is eliminated U1100..66 VNAV Baassiicc Chhaannggeess The Boeing Company 737.3 737 FMC • Descent path now extends beyond lateral discontinuities • Approach waypoint altitude constraints cannot be deleted with altitude intervention • Allow crew modification of runway angle (for VFR approaches). Added a field for angle entry to ARR page, under RW EXT field U1100..66 VNAV Baassiicc Chhaannggeess The Boeing Company 737.4 Geometric Path Descent (Basic) Late Descent or Speed Intervention VNAV switches from VNAV SPD to VNAV PTH on “point to point” leg “Non-geometric” option no longer available The Boeing Company 737.5 Descent Path After Discontinuities Speed/altitude predictions. The Boeing Company 737.6 Altitude Intervention Cannot Delete Approach Waypoint Constraints Base approach altitude constraints can be deleted only via the CDU (to prevent inadvertent deletion) Cannot be deleted with Altitude Intervention The Boeing Company 737.7 Crew Defined Runway Angle New field The Boeing Company 737.8 10.6 Optional VNAV Changes Added as part of Common VNAV option: • Use VNAV SPD instead of overspeed disconnect for unforecast tailwinds or late descent (Common with other Boeing FMCs) • Remove SPEED DES prompt from DES page • PATH or SPEED removed from DES page title, since it is now always path, e.g., ACT ECON DES • Common VNAV will provide increased commonality with other Boeing FMCs and reduce training The Boeing Company 737.9 Common VNAV VNAV SPD used for late descent and reversions Page title changed SPEED prompt removed The Boeing Company 737.10 Common VNAV Descent path recaptured when airplane satisfies capture criteria The Boeing Company 737.11 Other U10.6 Features • Improve SEL DES WPT page: – Add capability to display names of airports, navaids, and non-directional beacons – Added NDB frequencies – New page format can be used with or without extra data in navigation data base The Boeing Company 737.12 SELECT DESIRED WAYPOINT Name added in header, and frequencies displayed, matches charts Old page. The Boeing Company 737.13 SELECT DESIRED WAYPOINT Names in the navigation data base may be omitted to keep data base size smaller for mixed fleet use with older FMCs such as U5. The page display is the same, minus the names. Old page The Boeing Company 737.14 Other U10.6 Features • Speed Propagation (Option)- When a manual speed is entered on CRZ page, it propagates to the rest of the vertical pages (like MD80/90) • Four additional FIX pages for a total of six (Option) • Quiet Climb modified to keep CUTBACK enabled during reentry of Vspeeds (Improvement to QCS Option) • LNAV Change to reduce bank angle at high altitudes (Basic) • Takeoff Speed Order Checking (V1<Vr<V2) (Basic) The Boeing Company 737.15 Speed Propagation 300 entered on CRZ, propagates to DES The Boeing Company 737.16 Four Additional FIX pages The Boeing Company 737.17 LNAV Roll Angle Change 0.0 5.0 10.0 15.0 20.0 25.0 0 20 40 60 80 100 120 Track Change Nominal Roll Angle U10.5 DO-236A Floor U10.6 The Boeing Company 737.18 Takeoff Speed Order Checking • If an entry is made that violates V1< Vr < V2, the remaining V speeds are deleted 119 The Boeing Company 737.19 The End |
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