Work instruction 

Type: 

E4 

Subject: 

Work instruction 

for MSB-E4-009 

Doc. No.: WI-MSB-E4-009 

Rev. No.: 0

Page 1 of 10

Prepared: B. Jäger 

Date: 07.10.2010 

Checked: G. Fritz 

Date: 07.10.2010 

WORK INSTRUCTION 

MSB-E4-009 

INSPECTION OF FUEL PRESSURE 

SUPPLY 
Work instruction 

Type: 

E4 

Subject: 

Work instruction 

for MSB-E4-009 

Doc. No.: WI-MSB-E4-009 

Rev. No.: 0

Page 2 of 10

Prepared: B. Jäger 

Date: 07.10.2010 

Checked: G. Fritz 

Date: 07.10.2010 

Index 

1 General ................................................................................................................... 3

2 Preparation.............................................................................................................. 3

3 Inspection Procedure................................................................................................ 4

4 Further measures....................................................................................................10

5 Referenced Documents............................................................................................10
Work instruction 

Type: 

E4 

Subject: 

Work instruction 

for MSB-E4-009 

Doc. No.: WI-MSB-E4-009 

Rev. No.: 0

Page 3 of 10

Prepared: B. Jäger 

Date: 07.10.2010 

Checked: G. Fritz 

Date: 07.10.2010 

1 General 

This document describes the inspection procedure of the Fuel Supply Quality in the 

installation. 

2 Preparation 

If fuel-pressure-signal damping measures according to IM Section 9.4 are introduced by the 

A/C manufacturer, these measures have to be removed. 

The following procedure has to be conducted prior to the inspection: 

# remove the fuel pressure sensor (refer to MM Chapter 73-00-51) 

# remove the banjo bolt between fuel pressure sensor and high pressure fuel pump 

 inlet (refer to MM Chapter 73-00-40) 

# install banjo bolt E4A-30-100-201 with 22 Nm 

# install fuel pressure sensor (refer to MM Chapter 73-00-52) 
Work instruction 

Type: 

E4 

Subject: 

Work instruction 

for MSB-E4-009 

Doc. No.: WI-MSB-E4-009 

Rev. No.: 0

Page 4 of 10

Prepared: B. Jäger 

Date: 07.10.2010 

Checked: G. Fritz 

Date: 07.10.2010 

3 Inspection Procedure 

To review the quality of the fuel pressure supply to the High Pressure Pump perform 

following action: 

# Select ECU A using the ECU Voter-switch 

# Start the engine as described in your Aircraft Operation Instructions 

# Perform an engine warm-up as described in your Aircraft Operation Instructions 

# Check that the second fuel pump is NOT activated. 

# Set up your wizard to perform a Live View – Online Analysis as described on the 

following pages 

(in case of doubt use Wizard User Guide (E4.08.09) ) 
Work instruction 

Type: 

E4 

Subject: 

Work instruction 

for MSB-E4-009 

Doc. No.: WI-MSB-E4-009 

Rev. No.: 0

Page 5 of 10

Prepared: B. Jäger 

Date: 07.10.2010 

Checked: G. Fritz 

Date: 07.10.2010 

Steps: 

1) Connect to ECU 

2) Select “Live View”-page 

3) Press “Load LiveView-Config” and load the “user defined” Live View Configuration 

provided by Austro Engine (Fuel_Pressure-Test _LiveViewConfig.xml) 

The config-file is provided with this MSB, if requested it will also be provided by AE After 

Sales. 

4) Select the file Fuel_Pressure-Test _LiveViewConfig.xml 

5) Click on “Open” 
Work instruction 

Type: 

E4 

Subject: 

Work instruction 

for MSB-E4-009 

Doc. No.: WI-MSB-E4-009 

Rev. No.: 0

Page 6 of 10

Prepared: B. Jäger 

Date: 07.10.2010 

Checked: G. Fritz 

Date: 07.10.2010 

6) Up to 10 pre-defined signals per ECU, the required mode and the sample interval are 

set automatically 

7) Press “Record Live View” 

# Continue as explained in section “Live View – Standard Mode” of the Wizard User 

Guide 

# Perform a Ground Run according to Maintenance Manual 71-00-03 

# Perform a test run on the following load points (Propeller Speed) with a minimum 

duration of 30 seconds on each load point. 

 * 1800rpm+/- 20rpm 

* 2000rpm+/- 20rpm 

* 2100rpm+/- 20rpm 

* 2300rpm+/- 20rpm 

# Stop the LiveView-measurement (stop-button). 

# Select ECU Auto using the ECU voter switch 

# Disconnect the AE300 Wizard from the EECU 

# Stop the engine ground run 
Work instruction 

Type: 

E4 

Subject: 

Work instruction 

for MSB-E4-009 

Doc. No.: WI-MSB-E4-009 

Rev. No.: 0

Page 7 of 10

Prepared: B. Jäger 

Date: 07.10.2010 

Checked: G. Fritz 

Date: 07.10.2010 

# Analyse the saved LiveView-measurement (“file-name.xml”) as described in Wizard 

User Guide (E4.08.09) using following criteria 

- In any load point the oscillation of the fuel pressure shall not exceed 

750mbar (750hPa) from peak to peak. 

Use the signal “Fuel Pressure, raw sensor value is used for evaluation. 

The oscillation of this unfiltered signal shall not exceed 300mV peak 

to peak which is equal to 750hPa peak to peak. 

- Select at least Fuel Pressure and Fuel Pressure, raw sensor value 

- Zoom into the area of interest (highest oscillations) using the + and - buttons 
Work instruction 

Type: 

E4 

Subject: 

Work instruction 

for MSB-E4-009 

Doc. No.: WI-MSB-E4-009 

Rev. No.: 0

Page 8 of 10

Prepared: B. Jäger 

Date: 07.10.2010 

Checked: G. Fritz 

Date: 07.10.2010 

- Select the maximum of the signal “fuel pressure, raw sensor value” which you can 

find in a signal as shown below in a time window of about 20 seconds. 

Record this value 

In our example 2722mV 

About 20seconds
Work instruction 

Type: 

E4 

Subject: 

Work instruction 

for MSB-E4-009 

Doc. No.: WI-MSB-E4-009 

Rev. No.: 0

Page 9 of 10

Prepared: B. Jäger 

Date: 07.10.2010 

Checked: G. Fritz 

Date: 07.10.2010 

-Select in the same time window the minimum of the signal “fuel pressure, raw 

sensor value” which you can find in a signal as shown below. 

Record this value 

In our example 1935mV 

Calculate the difference of Maximum and Minimum 

 Difference = 2722mV-1935mV = 787mV > 300mV 

In our example the difference exceeds the 300mV that means the HPP must be 

replaced. 

About 20seconds 
Work instruction 

Type: 

E4 

Subject: 

Work instruction 

for MSB-E4-009 

Doc. No.: WI-MSB-E4-009 

Rev. No.: 0

Page 10 of 10

Prepared: B. Jäger 

Date: 07.10.2010 

Checked: G. Fritz 

Date: 07.10.2010 

4 Further measures 

# If the supply quality (fuel pressure oscillation) is worse than the criteria (300mV – 

750hPa) it is required to replace the installed high pressure pump by a new pump 

according to the Maintenance Manual Doc. E4.08.04, Chapter 73-00-40. 

# If during the inspection preparation (refer to chapter 2) the banjo bolt has been 

replaced, the original A/C configuration has to be restored. 

5 Referenced Documents 

# Maintenance Manual latest effective version 

# Installation Manual latest effective version 

# Wizard User Guide latest effective version