Supplementary Procedures -Flight Management, Navigation 737 Operations Manual
If radio navaids are unavailable, compare the FMC position with the IRS positions using the POS REF page of the FMC CDU. If the two IRS positions are in agreement and the FMC position is significantly different, the FMC position is probably unreliable. The POS SHIFT page may be used to shift the FMC position to one of the IRS positions. This is accomplished by line selecting the IRS or radio position and then pressing the EXEC Key.
Confirm actual position with ATC radar or visual reference points if
available.
Navigate using the most accurate information available. The possibilities are: LNAV (continue to monitor FMC position using VOR/ADF raw data displays on the non–flying pilot's EHSI).
CAUTION: Navigating in the LNAV mode with an unreliable FMC position may result in significant navigation errors.
Conventional VOR/ADF procedures. Radar vectors from ATC. Dead reckoning from last known position. Use of visual references.
Lateral Navigation Using the AN/CDU
Entering Active FMC Flight Plan into AN/CDU
INIT/REF key ...................................................................................Push Observe the INDEX prompt is displayed.
INIT REF INDEX page..................................................................Select Press the INDEX prompt. Observe the INIT REF INDEX page displayed and the IRS NAV prompt in line (5R).
IRS LEGS page ..............................................................................Select Press the IRS NAV prompt. Observe the IRS LEGS page displayed and the prompt in line 5L: CROSSLOAD prompt if an active FMC flight plan exists; LAST FMC PLAN prompt if the FMC has failed and an active FMC flight plan existed prior to the failure.
FMC flight plan ............................................................................... Enter Line select 5L to display the active (or most recent) flight plan. A maximum of 20 waypoints can be displayed. Undefined procedural legs contained in the FMC flight plan are bypassed in the AN/CDU flight plan. Modify the flight plan if desired.
Supplementary Procedures -Flight Management, Navigation
737 Operations Manual
EXEC key ........................................................................................ Push Observe the IRS LEGS page changes to ACT.
Note: If the present FMC flight plan exceeds 20 waypoints: Repeat the above procedure during flight to update the AN/CDU flight plan with additional waypoints.
Manual Entry of AN/CDU Flight Plan
INIT/REF key .................................................................................. Push Observe the INDEX prompt is displayed.
INIT REF INDEX page ................................................................. Select Press the INDEX prompt. Observe the INIT REF INDEX page displayed and the IRS NAV prompt in line (5R).
IRS LEGS page .............................................................................. Select Key any of the following into the scratch pad:
- For a crew assigned identifier, key in the identifier (6 characters maximum) followed by latitude and longitude (for example, SIMONE/N4802.2W12241.3).
-For an AN/CDU assigned identifier, key in only latitude and longitude (for example, S3618.5E14136.9). The AN/CDU assigns a sequential identifier WPT01, etc.
-If repeating an identifier which is already in the flight plan, key in
only the identifier (for example, SEA). Enter each waypoint into the route by line selecting to the desired sequence. A maximum of 20 waypoints can be in the flight plan at any one time. If required, additional waypoints can be entered as the flight progresses.
EXEC key ........................................................................................ Push Observe the IRS LEGS page changes to ACT.
Copyright . The Boeing Company. See title page for details.
SP.11.14 December 3, 2004
Supplementary Procedures -Flight Management, Navigation 737 Operations Manual
Proceeding Direct to a Waypoint
IRS LEGS page ..............................................................................Select Key any of the following into the scratch pad:
- For a crew assigned identifier, key in the identifier (6 characters maximum) followed by latitude and longitude (for example, SIMONE/N4802.2W12241.3).
-For an AN/CDU assigned identifier, key in only latitude and longitude (for example, S3618.5E14136.9). The AN/CDU assigns a sequential identifier WPT01, etc.
-If repeating an identifier which is already in the flight plan, key in
only the identifier (for example, SEA).
On page 1/XX, line 1L, enter the desired waypoint over the
presently active waypoint.
EXEC key.........................................................................................Push Observe the MOD IRS LEGS page changes to ACT. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737-300机组操作手册Flight Crew Operations Manual FCOM 1(67)
