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38 Cards in this Set

  • Front
  • Back

Name 5 subsystems of the 757 auto flight system

Yaw Damper, Auto Flight Director System, MCDP, Thrust management, Auto-stab trim

What phases of flight can auto pilot be engaged

All but takeoff

State the type and location of the AFDS warning and caution indications

A/P disengage red warning on MIP


A/P fail amber caution on MIP


Aural warning


Master caution on glareshield EICAS A/P disengaged on EICAS

4 AFDS outputs

Primary flight controls


EFIS


EICAS


Warning electronics unit

Location of auto pilot lateral guidance servos

L and C in the left hand wing root


R in the right hand wing root

Which button is used to command the autopilot to a set EPR

Thrust button on the MCP

Which button is used to initiate a flight level change

FLCH button on MCP

What precautions are there so that a failure in the mode control panel do not affect the AFCS

Having a A and B channel for dual redundancy

Which A/P mode tends to overspend or stall the aircraft

V/S mode

What is the difference between Heading hold and Lateral navigation

Lateral nav takes commands from the FMC whereas heading hold is controlled manually

What is the difference between a LAND 2 and a LAND 3 indication on the ASA's

LAND 3 is determined valid when three FCC's, A/P servos, and outer loop data is normal whereas LAND 2 requires only two FCC's



LAND 3 = Fail operational


LAND 2 = Fail passive

State the location of the go around switch and the A/T disconnect

A/T on the outside of the throttles


Go around underneath the throttles

What are two modes which it is not possible to enter go around mode

A/P disconnected


Takeoff

What limitations are there during a go around procedure in terms of Takeoff and Glideslope

Can not exit into these modes after Go around

What happens to the A/T and elevators during a Go Around

Throttles command 2000ft per minute climb and elevators will pitch up

The FCC's have functions that are not able to be used in our aircraft. How might these functions be activated

By pin programming

What is the device that stops damage to the system if the force coming from the control wheel is opposite from the force from the auto pilot system

Over-ride mechanism

How does cam out occur

When there is a disagreement between the two LVDT's in the servo cam out will occur and disengage the A/P

When does the A/P provide input to the rudder

During landing and rollout

How does Auto throttle achieve the FLCH function

The throttles will automatically move to acquire the calculated EPR and reach the selected altitude

What are the names of all the modes on the TMSP

Takeoff/Go aroundOAT adjust knob (de-rate)


1 - 6% below max climb power


Takeoff/Go aroundOAT adjust knob (de-rate)1 - 6% below max climb power2 - 12% below max climb powerCRZ - cruise powerCLB - max climb power CONT - max continuous power


2 - 12% below max climb power


CRZ - cruise power


CLB - max climb power


CONT - max continuous power

Why is there a tacho generator connected to the auto throttle servo motor

Provides feedback to the TMC so it doesn't overshoot its set EPR

How is the auto throttle servo disconnected when the throttle is moved manually

By a clutch pack releasing it

Can the TMS control the throttles separately

No, there is only one actuator that moves both throttles

Auto throttle disconnect indications

A/T disconnect Annunciation on the MIPAural warningEICASMaster caution


Aural warning


EICAS

Three purposes of the Yaw Damper system

Turn coordinaton


Counter sideslip


Give control to the A/P for autoland CAT III

Sensors that provide sideslip information to the Yaw Damper modules

2x Modal suppression accelerometers

What systems require to be up and running for a Yaw Damper test

1x IRU, EICAS, L and C hydraulics

How is Mach/Speed mode activated for Auto stab trim

Automatically depending whether the flaps are up or down 20 seconds after take off

Modes of priority for stab trim

1. Manual electric/alternate trim


2. Auto stab trim (FMC)


3. Mach/Speed

Which stab trim component generates auto trim commands and what component carries it out

Generated by the FCC's and carried out by the selected SAM

Three primary systems that send data to the MCDP

3x FCC, 1x TMC, 2x FMC

Functions of the Thrust Management System

Calculates EPR


Calculates upper and lower EPR limits for varying flight conditions


Interfaces with A/P and A/T to achieve automatic throttle control


Display EPR on EICAS


Display TMS mode on EADI and EICAS


Carry out self testing

Where does the PLA sensor send electrical signals

TMC


BVCU

What do the TMSP buttons do

Change the EPR reference bug on EICAS

Purpose of the STCM

To provide direction and rate control to the stabilizer trim balk screw actuator

What system varies the rate of movement of the stab trim according to airspeed

The elevator feel computer

What interface does the SPMs provide

An interface between the LSTMs and the FCCs