Power Plant

Question 1

What are the F100 Engines?

Answer 1

Rolls Royce Tay 650-15
Also
Rolls Royce Tay 620

Question 2

Tay 650-15 thrust

Answer 2

15,100 lbs, flat rated at ISA + 15

Question 3

LP Spool

Answer 3

Single stage Fan
3 stage IP Compressor
3 stage LP turbine
RPM = N1

Question 4

HP spool

Answer 4

12 stage HP compressor
2 stage HP turbine
RPM = N2

Question 5

Gearboxes

Answer 5

HP shaft drives high speed gearbox

LP shaft drives low speed gearbox

Question 6

High speed gearbox drives …?

Answer 6

Hydraulic pumps
Fuel pump
Oil pump
IDG
Fuel flow regulator
N2 tachometer generator

Question 7

Low speed gearbox drives …?

Answer 7

N1 tachometer generator
Shaft governor

Question 8

Fan output

Answer 8

3/4 bypass engine core
1/4 enters engine core

Question 9

Bleed air ducts

Answer 9

7th and 12th stages

Question 10

Combustion section

Answer 10

10 chambers in annular casing

Question 11

Igniter plugs

Answer 11

2 plugs in chambers 4 and 8

Question 12

Engine oil system

Answer 12

Self contained in oil tank on lower left side
Single pressure pump from HP gearbox
Fuel cooled oil cooler
Temp bulb and pressure filter
5 scavenge pumps return oil to tank
Passes through magnetic chip detector and filter

Question 13

Engine fuel system

Answer 13

LP fuel pump - high speed gearbox
Passes through engine and IDG oil coolers - prevent ice in fuel
Passes through fuel flow sensors
Filter
HP fuel pump - high speed gearbox
Output governed by fuel flow regulator - According to TLA
Shut off valves - fuel levers on pedestal

Question 14

Engine Multiplexers - EMUX

Answer 14

Dual channel - allows cross referencing for accuracy
Sends engine data to:
- AF AS
- FWC
- MFDS
- single channel fault indicated on MFDS

Question 15

MFDU engine data

Answer 15

Left MFDU - primary page
Right MFDU - secondary page

Question 16

Primary Page

Answer 16

EPR
TGT
N1
N2
Thrust rating - TOGA, FLEX, CLB, CRZ, MCT
TAT & SAT

Question 17

Secondary page

Answer 17

Oil pressure! Temperature, quantity
Engine vibration
Fu3l temperature, flow, fuel used

Question 18

Standby engine indicator (SEI)

Answer 18

Connected directly to the engine - analogue signals

Question 19

N1 red limit marker position

Answer 19

95.5 %

Question 20

Standby engine indicator displayed parameters

Answer 20

N1
N2
TGT
EPR

Question 21

Red limit on oil pressure indicator

Answer 21

Diaries with N2

Question 22

Purpose of fuel flow regulator

Answer 22

To meter the fuel to the combustion chambers

Question 23

When starting the engine, the fuel lever should be moved to the OPEN position at…..?

Answer 23

15% N2 with N1 rotation

Question 24

Moving the fuel lever to the open position will …….?

Answer 24

Open the HP fuel valve and start the ignition operating

Question 25

The fuel used indication on the MFDU secondary page will reset to zero when…….?

Answer 25

The engine is started on the ground

Question 26

If an MFDU primary page parameter fails what will happen?

Answer 26

The tape will display INOP with dashes for the numerals

Question 27

The limitations on use of the starter motor are …..?

Answer 27

4 attempts - max 2 min each
30 second rundown between attempts
After 4th attempt 15 minutes cooling

Question 28

EMUX vs EFSU

Answer 28