Navigation Flashcards
What is shown on ND when EFIS control panel POS push button is pushed?
Displays left and right GPS positions on the ND.
How is ADIRU alignment affected by aircraft movement?
Aircraft must be parked
Alignment stops if an ADIRU detects motion during alignment. Then continues and completes 10 minutes after motion stops.
Present position (Lat and Long) must be entered on the CDU POS INIT page to complete alignment.
When must a full alignment be accomplished and how?
Must be accomplished when the time from the last full alignment to the next expected arrival time exceeds 18 hours.
Rotate IRS mode selector to off and then back to NAV.
How is a 30 second fast align accomplished?
Positioning selectors to align, entering present position and repositioning selectors to NAV.
Can all 3 IRU’s operate using D.C.? Any time limit?
L/R ADIRU can operate on D.C. power continuously.
C ADIRU operates on DC power for 5 minutes and then shuts down.
What is the list of DME stations on POS REF page 2 used for?
Displays the identifiers of the DME stations used for FMC position updates.
When will the ILS receivers tune automatically?
- ILS, LOC, Back course, LDA, or SDF approach has been selected to the active route, and
- The airplane is within 150nm of the destination airport, 50nm of T/D, or in FMC descent.
When is ILS frequency change inhibited?
- On initial takeoff, inhibited for 10 minutes to prevent clutter on PFD.
- A/P engaged and LOC or G/S captured.
- FD ON and LOC or G/S captured and aircraft below 50 feet RA.
- On ground, LOC alive, aircraft heading within 45 degrees LOC course, ground speed more than 40KT.
Which radio can be tuned using Centre CDU after the failure of both FMC’s?
Both ILS and GLS receiver.
Describe GLS tuning method.
Manually on NAV RAD page by entering valid GLS channel between 20,000-39,999 or auto tuned.
Which ND mode can display weather radar return?
All except PLAN, VOR Centre, APP Centre.
Where is the weather radar status displayed (operating mode and fault condition)?
ND
Which weather radar setting is available during multiscan weather radar operation (tilt and gain)?
Auto- can only adjust gain and only shows you significant weather.
Manual- can adjust both tilt and gain.
Can CAT be sensed by the weather radar?
No
When will the FMC sequence an active waypoint?
Will NOT sequence an active waypoint when more than 21nm off the active route and not on an offset course.