Work instruction

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E4 Subject: Work instruction for MSB-E4-009 Doc. No.: WI-MSB-E4-009 Rev. No.: 0

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Prepared: B. Jäger Date: 07.10.2010 Checked: G. Fritz Date: 07.10.2010 

# WORK INSTRUCTION MSB-E4-009 INSPECTION OF FUEL PRESSURE SUPPLYWork instruction

Type:

E4 Subject: Work instruction for MSB-E4-009 Doc. No.: WI-MSB-E4-009 Rev. No.: 0

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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............................................................................................10Work instruction

Type:

E4 Subject: Work instruction for MSB-E4-009 Doc. No.: WI-MSB-E4-009 Rev. No.: 0

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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 accord ing 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

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E4 Subject: Work instruction for MSB-E4-009 Doc. No.: WI-MSB-E4-009 Rev. No.: 0

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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 Vi ew – Online Analysis as described on the following pages (in case of doubt use Wizard User Guide (E4.08.09) )Work instruction

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E4 Subject: Work instruction for MSB-E4-009 Doc. No.: WI-MSB-E4-009 Rev. No.: 0

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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

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E4 Subject: Work instruction for MSB-E4-009 Doc. No.: WI-MSB-E4-009 Rev. No.: 0

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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 runWork instruction

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E4 Subject: Work instruction for MSB-E4-009 Doc. No.: WI-MSB-E4-009 Rev. No.: 0

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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 Pre ssure, raw sensor value

- Zoom into the area of interest (highe st oscillations) using the + and - buttonsWork instruction

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E4 Subject: Work instruction for MSB-E4-009 Doc. No.: WI-MSB-E4-009 Rev. No.: 0

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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 20secondsWork instruction

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E4 Subject: Work instruction for MSB-E4-009 Doc. No.: WI-MSB-E4-009 Rev. No.: 0

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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 20secondsWork instruction

Type:

E4 Subject: Work instruction for MSB-E4-009 Doc. No.: WI-MSB-E4-009 Rev. No.: 0

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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 inst alled 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 conf iguration has to be restored.



# 5 Referenced Documents # Maintenance Manual latest effective version # Installation Manual latest effective version # Wizard User Guide latest effective version