Thielert Aircraft Engines GmbH

Platanenstraße 14

D - 09350 Lichtenstein

 Supplement

Airplane Maintenance

Manual

Cessna 172 & Reims F172

CENTURION 2.0 (TAE 125-02-99)

Doc. No.: AMM-20-02 (US-Version)

Version: 1/1

Tel. +49 37204 696-0

Fax +49 37204 696-2912

www.centurion-engines.com

support@centurion-engines.com

 CAUTION:

This Supplement to the Airplane Maintenance Manual must

be read completely before maintenance action, as it

contains important safety information.

Note:

The Supplement to the Airplane Maintenance Manual is to

be included at every Cessna 172 and Reims F172 with 

CENTURION 2.0 (TAE 125-02-99) installation

 Note:

Please report any service difficulties to the Technical 

Support Center at Thielert Aircraft Engines GmbH.

See above for contact information.

 CAUTION:

The organizations and staff who carry out these

maintenance action must be approved by the authority,

with the exception of the “Pre-flight check“
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Rev. No:

Rev. Date:

Chapter:

Issue:

Issue Date:

Page:

Content:

20-AMM-00-02-US

1

02.02.2007

1

6

1

08.10.2010

TABLE OF CONTENTS

0.1 LIST OF REVISIONS ....................................................5

0.2 LIST OF APPLICABLE CHAPTERS .............................6

01 INTRODUCTION...........................................................1

01.1 ACCOMPANYING APPLICABLE

DOCUMENTS ...............................................................1

01.2 IDENTIFICATION OF PARTS OF 

CENTURION 2.0 INSTALLATION.................................2

01.3 COPYRIGHT © .............................................................4

01.4 CONVENTIONS IN THIS MANUAL ..............................4

01.5 VALIDITY OF THIS MANUAL .......................................4

01.6 ABBREVIATIONS .........................................................5

01.7 PACKING AND TRANSPORT.......................................5

01.8 STORAGE.....................................................................5

01.9 QUALIFICATIONS OF THE OPERATING AND MAINTENANCE PERSONNEL ..............................................5

01.10 UPDATE INFORMATION SERVICE.............................5

01.11 SERVICE LIFE OF THE ENGINE .................................5

01.12 CONVERSION FACTORS ............................................6

04 AIRWORTHINESS LIMITATIONS,

INITIAL ISSUE ..............................................................1

04.1 ENGINE LIFE LIMIT......................................................1

04.2 MANDATORY MAINTENANCE ACTIONS ...................1

04.3 LOG OF REVISIONS TO AIRWORTHINESS LIMITATIONS ...........................................................................2

05 TIME LIMITS / MAINTENANCE CHECKS ...................1

05.10 TIME LIMITS .................................................................2

05.20 SCHEDULED MAINTENANCE CHECKS .....................2

05.50 UNSCHEDULED MAINTENANCE................................5
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Chapter:

Issue:

Issue Date:

Page:

Content:

20-AMM-00-02-US

1

02.02.2007

2

6

Rev. No:

Rev. Date:

1

08.10.2010

06 DIMENSIONS AND AREAS .........................................1

06.1 MODEL..........................................................................1

06.2 ENGINE.........................................................................1

06.3 PROPELLER.................................................................2

06.4 FUEL SYSTEM .............................................................2

12 SERVICING...................................................................1

12.00 GENERAL .....................................................................1

12.10 REPLENISHING............................................................3

12.20 SCHEDULED SERVICING............................................6

1 STANDARD PRACTICES - AIRFRAME ......................1

1.00 GENERAL .....................................................................1

1.10 Standard Torque Values ...............................................1

1.20 Firewall Sealants ...........................................................3

21 ENVIRONMENTAL SYSTEMS.....................................1

21.00 GENERAL .....................................................................1

24 ELECTRICAL POWER .................................................1

24.00 GENERAL .....................................................................1

24.30 DC GENERATION.........................................................2

24.50 ELECTRICAL LOAD DISTRIBUTION ...........................8

28 FUEL .............................................................................1

28.00 GENERAL .....................................................................1

28.20 DISTRIBUTION .............................................................2

28.40 INDICATING................................................................10

31 INDICATING / RECORDING SYSTEMS ......................1

31.50 CENTRAL WARNING SYSTEMS .................................1

31.60 INDICATING INSTRUMENTS ......................................2
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Rev. No:

Rev. Date:

Chapter:

Issue:

Issue Date:

Page:

Content:

20-AMM-00-02-US

1

02.02.2007

3

6

1

08.10.2010

37 VACUUM.......................................................................1

37.00 GENERAL .....................................................................1

61 PROPELLER ................................................................1

61.10 CONSTANT SPEED PROPELLER...............................1

61.20 CONSTANT SPEED UNIT ............................................2

71 POWER PLANT............................................................1

71.00 GENERAL .....................................................................1

71.20 MOUNTS.....................................................................34

71.40 ATTACH FITTINGS.....................................................36

71.60 AIR INTAKES .............................................................37

73 ENGINE FUEL SYSTEM...............................................1

73.00 GENERAL .....................................................................1

74 IGNITION ......................................................................1

74.00 GENERAL .....................................................................1

75 LIQUID COOLING.........................................................1

75.00 GENERAL .....................................................................1

77 ENGINE INDICATION...................................................1

77.00 GENERAL .....................................................................1

78 EXHAUST .....................................................................1

78.00 GENERAL .....................................................................1

79 OIL ................................................................................1

79.00 GENERAL .....................................................................1

79.30 INDICATING..................................................................4
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Chapter:

Issue:

Issue Date:

Page:

Content:

20-AMM-00-02-US

1

02.02.2007

4

6

Rev. No:

Rev. Date:

1

08.10.2010

80 STARTING ....................................................................1

80.00 GENERAL .....................................................................1

91 CHARTS AND WIRING DIAGRAMS............................1

91.10 WIRING DIAGRAMS.....................................................1

91.20 SPECIAL TOOLS ........................................................12
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Revision no.:

Revision date:

Chapter:

Issue:

Issue date:

Page:

Content:

20-AMM-00-02-US

1

02.02.2007

5

6

1

08.10.2010

0.1 LIST OF REVISIONS

Chapter Issue/Revision Date Approved by

20-AMM-00-02-US 1/1 08.10.2010 van den Bosch

20-AMM-01-02-US 1/1 08.10.2010 van den Bosch

20-AMM-04-02-US 1/1 08.10.2010 van den Bosch

20-AMM-05-02-US 1/1 08.10.2010 van den Bosch

20-AMM-06-02-US 1/1 08.10.2010 van den Bosch

20-AMM-12-02-US 1/1 08.10.2010 van den Bosch

20-AMM-20-02-US 1/0 08.10.2010 van den Bosch

20-AMM-21-02-US 1/1 08.10.2010 van den Bosch

20-AMM-24-02-US 1/1 08.10.2010 van den Bosch

20-AMM-28-02-US 1/1 08.10.2010 van den Bosch

20-AMM-31-02-US 1/1 08.10.2010 van den Bosch

20-AMM-61-02-US 1/1 08.10.2010 van den Bosch

20-AMM-71-02-US 1/1 08.10.2010 van den Bosch

20-AMM-73-02-US 1/1 08.10.2010 van den Bosch

20-AMM-75-02-US 1/0 08.10.2010 van den Bosch

20-AMM-79-02-US 1/1 08.10.2010 van den Bosch

20-AMM-91-02-US 1/1 08.10.2010 van den Bosch
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Chapter:

Issue:

Issue date:

Page:

Content:

20-AMM-00-02-US

1

02.02.2007

6

6

Revision no.:

Revision date:

1

08.10.2010

0.2 LIST OF APPLICABLE CHAPTERS

Chapter Issue/Revision Date

20-AMM-00-02-US 1/1 08.10.2010

20-AMM-01-02-US 1/1 08.10.2010

20-AMM-04-02-US 1/1 08.10.2010

20-AMM-05-02-US 1/1 08.10.2010

20-AMM-06-02-US 1/1 08.10.2010

20-AMM-12-02-US 1/1 08.10.2010

20-AMM-20-02-US 1/0 08.10.2010

20-AMM-21-02-US 1/1 08.10.2010

20-AMM-24-02-US 1/1 08.10.2010

20-AMM-28-02-US 1/1 08.10.2010

20-AMM-31-02-US 1/1 08.10.2010

20-AMM-37-02-US 1/0 02.02.2007

20-AMM-61-02-US 1/1 08.10.2010

20-AMM-71-02-US 1/1 08.10.2010

20-AMM-73-02-US 1/1 08.10.2010

20-AMM-74-02-US 1/0 02.02.2007

20-AMM-75-02-US 1/0 08.10.2010

20-AMM-77-02-US 1/0 02.02.2007

20-AMM-78-02-US 1/0 02.02.2007

20-AMM-79-02-US 1/1 08.10.2010

20-AMM-80-02-US 1/0 02.02.2007

20-AMM-91-02-US 1/1 08.10.2010

Prepared by: Checked by Released by:

S.Braun M. Steinberg, MPI R. van den Bosch, MPL
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Rev. No:

Rev. Date:

Chapter:

Issue:

Issue Date:

Page:

Content:

20-AMM-24-02-US

1

02.02.2007

1

14

1

08.10.2010

24 ELECTRICAL POWER

24.00 GENERAL

DESCRIPTION AND OPERATION

For Cessna 172 with CENTURION 2.0 installation there are two

electrical system variants possible:

• 14 Volt or

• 28 Volt

The 14V system is equipped with a 90 amp alternator, a 14V

starter, a 12V battery and an excitation battery for the alternator. 

The 28V system is equipped with a 60 amp alternator, a 28V

starter, a 24V battery and an excitation battery for the alternator. 

The alternator and the battery are operated by a separate rocker

switch (BAT and ALT) located on the instrument panel. 

The excitation battery of the alternator is operated with the BAT

switch simultaneously. 

A warning light (ALT WRNG LT) on the TAE-lightpanel will

illuminate if the alternator fails to produce current, accompanied

by a zero indication on the AED-125. 

The battery switch (BAT) must be ON before any electrical

equipment will operate. 

In addition to the main battery and alternator, a backup battery

which only supplies power to FADEC-A is part of the electrical

system when installed.

The FADEC backup battery is integrated into the electrical

system without manual control. The pilot can not manually switch

the FADEC backup battery on or off. Under normal operating

conditions when the alternator voltage is greater than the battery

voltage, the alternator charges the battery.

In the event of an alternator failure and a depleted or failed main

Battery, the FADEC backup battery is the only power source and

will automatically supply power to FADEC A. This prevents the

engine from stopping in the unlikely event of interrupted power

supply from both alternator and main battery. 

For wiring diagrams of the electrical systems of CENTURION 2.0

installations refer to Chapter 91, Section 91.10 of this

supplement.

S WARNING: When operating on FADEC backup battery only, the "Force B"

switch must not be activated. This will shut down the engine.
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Chapter:

Issue:

Issue Date:

Page:

Content:

20-AMM-24-02-US

1

02.02.2007

2

14

Rev. No:

Rev. Date:

1

08.10.2010

24.30 DC GENERATION

PRECAUTIONS

The following precautions must be observed when testing the

electrical system.

S WARNING: Failure to observe these precautions will result in serious

damage to the electrical equipment !

 CAUTION: Refer to wiring diagram in Chapter 91, Section 91.10 when

install-ing or testing alternator.

 CAUTION: Disconnect battery, excitation battery and backup battery before

connecting or disconnecting test instruments (except voltmeter),

or before removing or replacing any unit or wiring. Accidental

grounding or shorting at alternator with internal regulator (14V

version only), alternator without internal regulator (28V version

only), regulator (28V version only), excitation battery, ammeter

or accessories, will cause severe damage to units and/or wiring.

 CAUTION: Disconnect main battery before connecting or disconnecting the

excitation or backup battery! The excitation battery wire from the

alternator (14V version) or from the regulator (28V version) may

carry electrical power even without connected excitation battery

in case the main battery is still connected to the system.

 CAUTION: Grounding the alternator output terminal will damage alternator

and/or circuit and components !

 CAUTION: Reversed battery connections will damage rectifiers, wiring,

regulator and other charging system components ! Battery

polarity must be checked with a voltmeter before connecting

battery. The aircraft is negative ground.

 CAUTION: If booster battery or fast charger is used, its polarity must be

connected correctly to prevent damage to electrical system

components !
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Rev. No:

Rev. Date:

Chapter:

Issue:

Issue Date:

Page:

Content:

20-AMM-24-02-US

1

02.02.2007

3

14

1

08.10.2010

TROUBLESHOOTING

Table 24-1a Troubleshooting CENTURION 2.0 DC Generation

MAINTENANCE PRACTICES

1. General

These maintenance practices provide instructions to

• inspect the main battery

• replace the main battery

• replace the excitation battery

• Functioning check of the FADEC backup battery

• replace the FADEC backup battery (if installed per TM

TAE 601-1001)

2. Inspecting the Main or FADEC backup Battery

• Visually inspect the battery for signs of damage, leaks

and corrosion. Refer to the battery manufacturer’s

specifications (refer to 01.1). 

• Check for incorrect mounting.

• Check the terminal connections.

Trouble Check Corrective Action

Check alternator wiring Replace alternator wiring

Check alternator fuse Replace alternator fuse

Check alternator relay Replace alternator relay

Check alternator switch Replace alternator switch

Check alternator funcion Replace alternator

Check excitation battery Replace excitation battery

Check excitation battery 

wiring

Repair wiring

FADEC backup battery 

capacity low

Replace Battery

FADEC backup battery 

defect

Replace Battery

FADEC backup battery 

system wiring defective

Do a test of the FADEC 

backup battery system 

wiring

Refer to chapter 91 for the 

wiring diagrams

Lack of alternator 

current

Alternator does not 

work correctly without 

main battery connected 

and switched on

FADEC backup battery 

functioning test negative
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Chapter:

Issue:

Issue Date:

Page:

Content:

20-AMM-24-02-US

1

02.02.2007

4

14

Rev. No:

Rev. Date:

1

08.10.2010

3. Disconnecting / Connecting the Main Battery for

Maintenance

A. Disconnect the Main Battery for Maintenance

(1) Remove the bottom of the extended baggage

area. Refer to the airplane manufactuerer ́s

specifications.

(2) Remove the cover from the battery box.

(3) Disconnect the negative cable from the main

battery. See Figure 1.

Figure 1 Main BatteryMain battery

2 Negative cable

3 Battery box

(4) Disconnect the positive cable from the main

battery.

D. Connect the Main Battery after Maintenance

(1) Connect the positive cable to the main battery.

(2) Connect the negative cable to the main battery.

(3) Install the cover to the battery box

(4) Install the bottom of the extended baggage area.

Refer to the airplane manufacturer ́s

specifications.

1

2 3

 CAUTION: Make sure that you connect the cables to the correct terminals!

Incorrect connection can damage the electrical and avionic

systems.
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Rev. No:

Rev. Date:

Chapter:

Issue:

Issue Date:

Page:

Content:

20-AMM-24-02-US

1

02.02.2007

5

14

1

08.10.2010

4. Replacing the Main Battery

A. Remove the Main Battery

(1) Remove the bottom of the extended baggage

area. Refer to the airplane manufacturer ́s

specifications.

(2) Remove the cover from the battery box.

(3) Disconnect the negative cable from the main

battery. See Figure 1.

(4) Disconnect the positive cable from the main

battery.

(5) Remove the main battery from the airplane.

B. Install the new Main Battery in the Airplane

(1) Make sure that the main battery is dry and clean

(2) Place the main battery into position in the battery

box

(3) Connect the positive cable to the main battery

(4) Connect the negative cable to the main battery.

(5) Install the cover to the battery box

(6) Install the bottom of the extended baggage area.

Refer to the airplane manufacturer ́s

specifications.

 CAUTION: Make sure that you connect the cables to the correct terminals!

Incorrect connection can damage the electrical and avionic

systems.
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Chapter:

Issue:

Issue Date:

Page:

Content:

20-AMM-24-02-US

1

02.02.2007

6

14

Rev. No:

Rev. Date:

1

08.10.2010

5. Replacing the Excitation Battery

A. Remove the Excitation Battery

(1) Disconnect the main battery. Refer to 3,

Disconnect / Connect the Main Battery for

Maintenance.

(2) Disconnect the negative cable from the

excitation battery.

(3) Disconnect the positive cable from the excitation

battery.

(4) Remove the battery carrier (top)

(5) Remove the excitation battery from the airplane.

B. Install the new Excitation Battery

(1) Place the excitation battery into position in the

battery carrier (bottom).

(2) Install the battery carrier (top)

(3) Connect the positive cable to the excitation

battery

(4) Connect the negative cable to the excitation

battery

(5) Connect the main battery. Refer to 3,

Disconnect / Connect the Main Battery for

Maintenance.

(6) Do an engine ground run. Refer to OM-02-02.

The Alternator Warning Lamp (AWL) must go

OFF.

6. Functioning check of the FADEC backup battery

(1) Start engine in accordance with TAE POH

supplement

(2) Turn off all avionics

(3) FADEC Backup Battery Test

a) Alternator Switch - OFF, engine must operate 

normally

b) Battery Switch - OFF, engine must operate

normally, FADEC Battery test successfull

c) Battery Switch - ON

d) Alternator Switch - ON

(4) Ammeter - Check positive change, alternator

warning light must be OFF

(5) Voltmeter - Check in green range

(6) Shut down engine
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Rev. No:

Rev. Date:

Chapter:

Issue:

Issue Date:

Page:

Content:

20-AMM-24-02-US

1

02.02.2007

7

14

1

08.10.2010

7. Replacing the Backup Battery

A. Remove the Backup Battery

(1) Disconnect the main battery. Refer to 3,

Disconnect / Connect the Main Battery for

Maintenance.

(2) Disconnect the negative cable from the black

backup battery terminal.

(3) For 28V system only: disconnect the cable which

interconnects the two batteries.

(4) Disconnect the positive cable from the red

backup battery terminal.

(5) Remove the battery carrier (top)

(6) Remove the backup battery from the airplane.

B. Install the new Backup Battery

(1) Place the backup battery into position in the

battery carrier (bottom).

(2) Install the battery carrier (top)

(3) Connect cable TF-06-B-10 to backup battery

positive connection (red terminal).

(4) For 28V systems only: interconnect the 2 backup

batteries with each other using cable TF-06-C-10

(5) Connect cable TF-06-N-10 to backup battery

negative connection (black terminal)

(6) Check if plug-in connection on backup battery is

fitted tightly!

(7) Connect the main battery. Refer to 3,

Disconnect / Connect the Main Battery for

Maintenance.

(8) Perform functioning check of the FADEC backup

battery. 

 Note: Charge the battery i.a.w. the manufacturers instruction before

installation into the aircraft.
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Chapter:

Issue:

Issue Date:

Page:

Content:

20-AMM-24-02-US

1

02.02.2007

8

14

Rev. No:

Rev. Date:

1

08.10.2010

24.50 ELECTRICAL LOAD DISTRIBUTION

TROUBLESHOOTING

For Troubleshooting in case of malfunction refer to refer to

Chapter 71

MAINTENANCE PRACTICES

1. General

These maintenance practices provide instructions to

inspect

• all relays

• all 14V / 28V converters, if installed

They also provide instructions to accomplish a function test

of the following parts:

• all relays

• all switches

• all circuit breakers

• all 14V / 28V converters, if installed

2. Inspecting the relays

This is a visual inspection. Inspect whether the connections

of the relays are firmly attached. In addition, the relays have

to be checked for signs of corrosion. 

The following relays have to be checked:

• Battery Relay (located in the Junction-Box on the

firewall)

• Alternator Relay (located in the Junction-Box on the

firewall)

• Glow Relay (located in the Junction-Box on the

firewall)

• Main Bus Relay, only C172 F, G, H, I, K, L, M, N, P

(located on the LH of the airframe, underneath the

Panel LH)

3. Inspecting the 14V / 28V Converters, if installed

This is ab visual inspection. Inspect whether the

connections of the 14V / 28V are firmly attached. In

addition, the 14V / 28V convertershas to be checked for

signs of corrosion.
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Rev. No:

Rev. Date:

Chapter:

Issue:

Issue Date:

Page:

Content:

20-AMM-24-02-US

1

02.02.2007

9

14

1

08.10.2010

4. Accomplishing a function test of all relays

The following relays must be tested:

• Battery Relay (located in the Junction-Box on the

firewall)

• Alternator Relay (located in the Junction-Box on the

firewall)

• Glow Relay (located in the Junction-Box on the

firewall)

• Main Bus Relay, only C172 F, G, H, I, K, L, M, N, P

(located on the LH of the airframe, underneath the

Panel LH)

A. Accomplish the function test of the Battery Relay

(1) Battery Switch “ON“

(2) AED, CED illuminate (without data)

(3) Fuel Pump functional (switch Fuel Pump) 

(4) => Battery Relay OK

(5) Battery Switch “OFF“

B. Accomplish the function test of the Alternator

Relay

(1) Battery Switch “ON“

(2) Alternator Switch “ON“

(3) A voltmeter must indicate the same voltage at

the Alternator (Terminal Wire 3) as at the battery

(4) Alternator Switch “OFF“: No voltage at the

Alternator (Terminal Wire 3)

(5) => Alternator Relay OK

(6) Battery Switch “OFF“

C. Accomplish the function test of the Glow Relay

(1) Battery Switch “ON“

(2) Engine Master “ON“

(3) Voltage at the Glow Plugs, Glow Lamp “ON“

(approx. 5sec.)

(4) => Glow Relay OK

(5) Engine Master “OFF“

(6) Battery Switch “BATT “OFF“
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Chapter:

Issue:

Issue Date:

Page:

Content:

20-AMM-24-02-US

1

02.02.2007

10

14

Rev. No:

Rev. Date:

1

08.10.2010

D. Accomplish the function test of the Main Bus

Relay

(1) Battery Switch “ON“

(2) Main Bus Switch “ON“

(3) Avionics, Lights etc. functional

(4) => Main Bus Relay OK

(5) Main Bus Switch “OFF“

(6) Battery Switch “OFF“

5. Accomplishing a function test of all switches/knobs

The following switches must be tested:

• Main Bus Switch

• Engine Master Switch

• Force B Switch

• FADEC Test Knob

• AED/CED Test Knob

• Alternator switch

A. Inspect all switches/knobs

(1) Visual inspect all switches/knobs on signs of

corrosion

(2) Visual inspect whether all connections of the

switches/knobs are firmly attached

B. Accomplish the function test of the Main Bus

Switch

(1) Battery Switch “ON“

(2) Main Bus Switch “ON“ 

(3) Main Bus Relay on, Avionics, Lights etc.

functional

(4) => Main Bus Switch OK

(5) Main Bus Switch “OFF“

(6) Battery Switch “OFF“

S WARNING: Only run the engine on the ground with the propeller running,

even for testing purposes, in a safe and clear area and ensure

that prop area is clear !
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Rev. No:

Rev. Date:

Chapter:

Issue:

Issue Date:

Page:

Content:

20-AMM-24-02-US

1

02.02.2007

11

14

1

08.10.2010

C. Accomplish the function test of the Engine Master

Switch

(1) Battery Switch “ON“

(2) Engine Master “ON“ => AED/CED indicate data

(3) Start engine

(4) Load Selector “IDLE“

(5) Accomplish FADEC Test procedure => OK

(6) Battery Switch “OFF“ => Engine must run

without Battery

(7) Switch FADEC A to FADEC B using the Force B

switch => Engine running OK

(8) => Engine Master Switch OK

(9) Engine Master “OFF“

(10) Battery Switch “OFF“ 

D. Accomplish the function test of the Force B

Switch

(1) Battery Switch “ON“

(2) Engine Master “ON“

(3) Start engine

(4) Load Selector “IDLE“

(5) FADEC toggles from FADEC A to FADEC B

using the Force B switch

(6) => Force B switch OK

(7) Engine Master “OFF“

(8) Battery Switch “OFF“

S WARNING: Only run the engine on the ground with the propeller running,

even for testing purposes, in a safe and clear area and ensure

that prop area is clear !

S WARNING: Only run the engine on the ground with the propeller running,

even for testing purposes, in a safe and clear area and ensure

that prop area is clear !
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Chapter:

Issue:

Issue Date:

Page:

Content:

20-AMM-24-02-US

1

02.02.2007

12

14

Rev. No:

Rev. Date:

1

08.10.2010

E. Accomplish the function test of the FADEC Test

Knob

(1) Battery Switch “ON“

(2) Engine Master “ON“

(3) Start engine

(4) Load Selector “IDLE“

(5) Push FADEC test knob => Test procedure OK

(6) => FADEC Test knob OK

(7) Engine Master “OFF“

(8) Battery Switch “OFF“

F. Accomplish the function test of the AED/CED Test

Knob

(1) Battery Switch “ON“

(2) Push AED/CED test knob => Selftest AED/CED

OK

(3) => AED/CED Test Knob OK

(4) Battery Switch “OFF“

G. Accomplish the function test of the Alternator

Switch

(1) Battery Switch “ON“

(2) Engine Master “ON“

(3) Start engine

(4) Load Selector “IDLE“

(5) Alternator Switch on: Load current (AED),

Voltage > 14V (AED), Alternator Warning Lamp

(AWL) off

(6) Alternator Switch off: No load current, voltage

<14V, Alternator Warning Lamp on

(7) => Alternator OK

(8) Engine Master “OFF“

(9) Battery Switch “OFF“

S WARNING: Only run the engine on the ground with the propeller running,

even for testing purposes, in a safe and clear area and ensure

that prop area is clear !

S WARNING: Only run the engine on the ground with the propeller running,

even for testing purposes, in a safe and clear area and ensure

that prop area is clear !
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Rev. No:

Rev. Date:

Chapter:

Issue:

Issue Date:

Page:

Content:

20-AMM-24-02-US

1

02.02.2007

13

14

1

08.10.2010

6. Accomplishing a function test of all Circuit Breakers

The following circuit breakers must be tested:

• FADEC A/B

• AED/CED

• Starter

A. Accomplish the function test of the Circuit

Breaker FADEC A/B

(1) Battery Switch “ON“

(2) Engine Master “ON“

(3) Establish CAN communication by connecting the

computer to the airplane

(4) Switch FADEC A/B via Circuit Breaker

(5) => Circuit Breaker FADEC A/B OK

(6) Remove CAN communiction

(7) Engine Master “OFF“

(8) Battery Switch “OFF“

B. Accomplish the function test of the Circuit

Breaker AED/CED

(1) Battery Switch “ON“

(2) Engine Master “ON“

(3) Switch AED/CED via Circuit Breaker AED/CED

(4) => Circuit Beaker AED/CED OK

(5) Engine Master “OFF“

(6) Battery Switch “OFF“

C. Accomplish the function test of the Circuit

Breaker Starter

(1) Battery Switch “ON“

(2) Engine Master “ON“

(3) Switch Starter via Circuit Breaker Starter

(4) => Circuit Breaker Starter OK

(5) Engine Master “OFF“

(6) Battery Switch “OFF“
Supplement Airplane Maintenance Manual

Cessna 172 / CENTURION 2.0

AMM-20-02 (US-Version)

Chapter:

Issue:

Issue Date:

Page:

Content:

20-AMM-24-02-US

1

02.02.2007

14

14

Rev. No:

Rev. Date:

1

08.10.2010

7. Accomplishing a function test of all 14V / 28V

converters, if installed

A. Accomplish the function test of all 14V / 28V

converters

(1) Battery Switch “ON“

(2) Main Bus Switch “ON“

(3) Consumer of electricity “ON“ (check under Load)

(4) Check Voltage, a voltmeter must indicate the

transformed voltage (refer to the 14V / 28V

Converter manufacturer)

(5) => 14V / 28V Converters OK

(6) Main Bus Switch “OFF“

(7) Battery Switch “OFF“