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Flashcards in Navigation Deck (42):

How much time is required for initial IRS alignment

Approximately 10 minutes at mid-latitudes


When the IRS Mode Selector is placed from OFF to the NAV position, what does the momentary illumination of the ON DC light indicate

The IRS alternate power source is available from the switched hot battery bus


What is the origin of the present position lat and long. Used in IRS alignment

Lat and long. Are selected from the database and entered by the crew


What is required for an IRS to automatically enter the NAV mode

All are required


What information is provided by the IRS in addition to present position, heading and attitude signals

Ground speed, ground track & wind data


Which IRS entries are subjected to the reasonableness test

Latitude & longitude


If,at the beginning of IRS alignment, the present position entry in the IRS fails the reasonableness test and the same position is re-entered, what indication does the crew see

The ALIGN light returns to steady ON


What condition may cause a reasonableness test failure when proper entry of present position has been accomplished

Aircraft has been moved to a different location with the IRS OFF


Which IRS entry or entries are cross checked by the system performance test

Latitude only


Which causes IRS alignment to be lost inflight

Moving the selector switch to ALIGN


After entering the present position during IRS alignment, what would indicate a reasonableness test failure

The ALIGN light flashes


What information is lost and can not be restored when inflight alignment of an IRS is lost

Present position


What are the normal electrical power sources for the IRS

The Standby AC bus for the left IRS & the No.2 Transfer bus for the right IRS


Which is correct for IRS backup source of electrical power

Left IRAs by the switched hot battery bus & right IRS by the switched hot battery bus for 5 minutes


Which statement is correct concerning IRS inflight present position

The crew can never update the IRS position inflight


What does an illuminated IRS DC FAIL light indicate

The IRS backup power source is not available


During the IRS initialization, if the reasonableness test fails, the ALIGN annunciator flashes. If the same wrong data is reentered a second time the ALIGN annunciator will continue to flash



The pilot can update the current IRS lat and long any number of times without delaying alignment as long as the IRS has not entered the NAV mode



What is true regarding the IRS

The IRS's are the sole source of Attitude and Heading except for the Standby Compass and Standby Attitude Indicator


What does the IRS performance test check

The latitude entered by the pilot


Which statement describes the IRS

All answers are correct


During normal IRS Alignment, the momentary illumination of the "ON DC" annunciator indicates____

The "ON DC" annunciator illuminates to indicate that the IRAs is capable of operating from it's backup DC power source


What is the power source for the right IRS when AC Transfer Bus #2 is lost

Switched hot battery bus for a maximum of 5 minutes


Which of the following will cause a flashing ALIGN light on the IRS Mode Panel during alignment

All answers are correct


During IRS alignment, all of the following will cause a flashing ALIGN light except

NAV database out of date


During normal IRS Alignment, the momentary illumination of the "ON DC" annunciator indicates____

A successful self test to indicate that the IRS backup DC power source is available


Which bus normally powers the left IRS

AC Standby Bus


When IRS alignment is lost inflight, all___\ features are lost for the remainder of the flight

Track and groundspeed


During takeoff with the flight director in the TOGA mode below 400ft, roll commands are for

Maintaining aircraft wings level


What does an illuminated F/D master light indicate

Indicates which FCC provides logic to F/D & A/P modes


What ensures that both the CAPT and F/O will have the same F/D VOR/LOC command guidance when the CAPT master F/D light is on

The same VHF frequency & course selection must be set on CAPT & F/O radios


How is the master F/D determined with no A/P engaged

The first F/D turned on


Both master lights on the Mode Control Panel ate illuminated at the same time when

The GA mode is engaged below 400 ft


How is the F/D TO mode engaged

Place both F/D switches to ON & press either TO/GA switch


What are the F/D pitch commands during the takeoff roll

10 degrees nose down until 60 knots, the 15 degrees nose up


When the First Officer is flying an ILS approach using the "A" autopilot, the APP mode will follow signals from the #2 Nav radio



When is the Flight Director Go-Around Mode armed

Below 2000 feet AGL


During a dual autopilot approach (A/P GA mode) which are the FMA and MCP indications when the GA mode is engaged

TO/GA is annunciated,IAS/ MACH display blanks


What is the initial F/D GA pitch command during a 2 engine missed approach

15 degrees nose up


What A/T thrust is generated during a F/D GA when the TOGA button is depressed once

A/T engages in GA and advances thrust toward the reduced go-around N1 to produce a 1000-2000 fpm rate of climb


How can the F/D APP mode be disengaged after the localizer and glideslope have been captured

All answers are correct


What causes the F/D command bars to bias out of view

Automatically at 59 feet RA on an ILS approach