Flight Management and Navigation Flashcards

1
Q

How/when does the FMC receive DME updating?

A

DME updating is defaulted to OFF and must be manually selected on the FMC NAV OPTIONS page

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2
Q

When the tunes frequency (no decoded name) remains visible on the PFD or ND, or shows an incorrect identifier, how do you verify the station identity?

A

Audio morse code

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3
Q

What does a flashing ALIGN light (white) on the IRS panel during preflight indicate?

A

When there is no present position entry, or

There is a significant difference between the entered position and the previously known position

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4
Q

What does the FAULT light (amber) on the IRS mode selector unit indicate?

A

A system fault affecting the related IRS ATT and/or NAV modes has been detected

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5
Q

What does the ON DC light (amber) illuminated in flight indicate?

A

Loss of AC power to the Associated IRS and it is now operating on DC power from the switched hot battery bus

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6
Q

What will happen if both ON DC lights (amber) illuminate?

A

Right IRS will turn off after 5 minutes

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7
Q

What does a single DC FAIL light (amber) illuminated in flight indicate?

A

Problem with the DC power supply for the associated IRS

If all other lights are extinguished, the IRS is operating normally on AC power

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8
Q

When is INSUFFICIENT FUEL on the CDU displayed?

A

Less than 2,000lbs of fuel estimated at destination

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9
Q

What are the indications of a left, right, or dual FMC failure?

A

VTK on the respective ND. For additional symptoms reference the QRH.

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10
Q

AT28R, BT28R, and CT28R are waypoints from what type of FMC procedure?

A

EOSID

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11
Q

IRS ground alignment at high latitude may take how long?

A

Up to 17 minutes

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12
Q

What does a GPS light (amber), illuminating during Master Caution Recall and extinguishing when the Master Caution System is reset, indicate?

A

A single GPS failure

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13
Q

With the FMC source select switch set to NORMAL, how are the FMCs controlling the CDUs and providing input to the autothrottle?

A

Left FMC is controlling the MCDUs and the Autothrottle

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14
Q

How does moving the FMC source select switch to BOTH ON L or R affect LNAV and VNAV?

A

Both LNAV and VNAV will disengage [but can be reengaged]

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15
Q

What does an illuminated MCDU EXEC light indicate?

A

Active data has been modified but not yet executed

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16
Q

What signifies mandatory data inputs on the MCDU?

A

Empty boxes

17
Q

When does LNAV engage, regardless of heading?

A

Within 3.0nm XTK of the course

18
Q

Define Actual Navigation Performance (ANP) and Required Navigation Performance (RNP)

A

ANP - FMC’s estimate of the quality of its’ position, estimates the maximum position error with 95% probability

RNP - Minimum required performance for segment of flight

ANP should not exceed RNP

19
Q

What assumptions are made to calculate the descent path?

A

Idle thrust, and
Descent winds, and
Speedbrakes retracted, and
Target descent speed maintained

20
Q

When does VNAV PTH revert to VNAV SPD?

A

Deviate more than 200’ above the path, or
Near overspeed, or
LNAV path ends [no TO waypoint]

21
Q

When will BYPASS appear between two waypoints on the legs page?

A

BYPASS appears when the next leg is too short to intercept and laterally capture the leg

22
Q

When using the IRS transfer switch, what amber caution appears? Is there a checklist for it?

A

INSTR SWITCH appears in amber on the PFD

There is NO checklist