YD651 - YD655 During VNAV PTH descents, a magenta bar is added along the right edge of the speed tape that indicates the FMC target airspeed. The band is displayed only for flaps up configurations while the “VNAV PTH” FMA is displayed.
YD651 - YD655 Once the crew has set Flap/VREF in the MCDU APPROACH REF page, a green “REF” and numerical landing Flap/VREF appears on the PFD. The REF symbol will move vertically adjacent to the reference airspeed, and the numerical display will remain fixed at the base and to the right of the speed tape.
Attitude
The attitude indication displays the airplane pitch and roll attitude referenced to
the horizon.
Pitch attitude is displayed by an airplane symbol against a pitch scale. The pitch
scale is in 2.5 degree increments.
A pointer indicates bank angle in increments of 10, 20, and 30 degrees. Single
marks indicate 45 and 60 degrees of bank. A small rectangle under the bank angle
pointer indicates slip and skid conditions. Bank angle is also represented by the
attitude of the airplane symbol against the horizon line and pitch scale.
YA626 - YA803, YC153 - YC413
A pitch limit indication is displayed at all times when the flaps are not up.
YA613, YA809, YD651 - YK104
A pitch limit indication is displayed at all times when the flaps are not up, or when
flaps are up and airspeed approaches stick shaker activation for existing flight
conditions.
Steering Indications
YA613 - YA809, YC411 - YK104 The flight director is displayed when the related flight director switch is on. Pitch and roll commands are combined on a single display.
YC153, YC154 The flight director is displayed when the related flight director switch is on. Pitch and roll commands are displayed independently.
The flight path vector (FPV) symbol represents airplane flight path angle vertically and drift angle laterally. The flight path vector is displayed on the PFD when the EFIS control panel FPV switch is selected on. The FPV shows the Flight Path Angle (FPA) above or below the horizon line and drift angle left or right of the pitch scale's center. The FPA uses inertial and barometric altitude inputs. The vertical FPA is unreliable with unreliable primary altitude displays.
Copyright . The Boeing Company. See title page for details.
10.31.2 June 1, 2005
Flight Instruments, Displays -Primary Flight Display (PFD) 737 Flight Crew Operations Manual
The FPV symbol is displayed in two brightness levels. The FPV symbol is displayed dim when either the flight director or a TCAS resolution advisory is displayed.The FPV symbol is displayed bright when the flight director is off and there is no TCAS resolution advisory displayed.
Instrument Landing System Indications
ILS glide slope and localizer deviation, frequency/identification, DME, course, and marker beacon indications are provided.
The approach reference information appears above and to the left of the attitude display. The ILS station identification or frequency, course, and (if available) DME are displayed.
The marker beacon indication (OM – outer marker, IM – inner marker, or MM –
middle marker) is displayed in the upper right corner of the attitude display area. The glide slope pointer and scale appear on the right side of the attitude indication when a valid signal is received. At low radio altitudes, with autopilot or flight director engaged, the scale turns amber and the pointer flashes to indicate an excessive glide slope deviation. The pointer is not displayed when the glide slope signal is unusable or when the track and the front course on the mode control panel differ by more than 90 degrees (backcourse).
The localizer pointer and scale appear at the bottom of the attitude indication when a valid signal is received. When the course deviation is slightly more than one–half dot, the localizer mode is engaged and track is within 5 degrees of the MCP selected course, the scale automatically expands. At low radio altitudes, with autopilot or flight director engaged, the scale turns amber and the pointer flashes to indicate excessive deviation. Below 1,000 feet AGL, with LNAV engaged and LOC armed, the localizer scale turns amber and the pointer flashes if the localizer is not captured.
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