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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 General3
2 Preparation3
3 Inspection Procedure4
4 Further measures10
5 Referenced Documents10
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 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
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 Vi ew – 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
Doc. No.: WI-MSB-E4-009 Austro Engine Work instruction Rev. No.: 0 Type: Subject: Page 7 of 10 E4 Work instruction for MSB-E4-009 # 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 = Live View: LiveView_20101004_D-GCAD_RH.xml
• A: Fuel pressure
•jA: Fuel pressure, raw sensor value a Injection, current quantity 8000- ЛА: PLY, duty cycle A: Propeller speed — a hall pressure, goveror devadon
• A: Rail pressure, peak value of last 10ms 040L 400 1 A: Rail pressure, sensor raw signal voltage
• A: Rail pressure, set point
• b: Fuel pressure ] B: Fuel temperature | B: Metering unit, duty cycle ] B: PCV, duty cycle
• B: Power lever position
• B: Rail pressure, governor deviation
- B: Rail pressure, peak value of last 10ms
• B: Rail pressure, set point 1600-1000- 800- 500- " 10 15 20 28 s0 36 40 45 s0 sg do o5 t0 ts d0 e5 90 85
- Zoom into the area of interest (highest oscillations) using the + and - buttons Prepared: B. Jager Checked: G. Fritz Date: 07.10.2010 Date: 07.10.2010
Doc. No.: WI-MSB-E4-009 Austro Engine Work instruction Rev. No.: O Type: Subject: Page 8 of 10 E4 Work instruction for MSB-E4-009
- 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 = Live View: LiveView_20101004_D-GCAD_RH.xml
• •
• A: Fuel pressure hPa mv
• A: Fuel pressure, raw sensor value 1 A: Injection, current quantity
• A: Metering unit, duty cycle 4800-3000 ] A: PCV, duty cycle ] A: Propeller speed _ A: hall pressure, governor deviation 1 A: Rail pressure, peak value of last 10ms ] A: Rail pressure, sensor raw signal voltage A: Rail pressure, set point B: Fuel pressure B: Fuel temperature 4000-2500 B: Metering unit, duty cycle _ B: PCV, duty cycle B: Power lever position B: Rail pressure, governor deviation
• B: Rail pressure, peak value of last 10ms
• B: Rail pressure, set point 3200-2000 About 20seconds 20 Prepared: B. Jäger Checked: G. Fritz Date: 07.10.2010 Date: 07.10.2010
Doc. No.: WI-MSB-E4-009 Austro Engine Work instruction Rev. No.: 0 Type: Subject: Page 9 of 10 E4 Work instruction for MSB-E4-009 -Select in the same time window the minimum of the signal "fuel pressure, raw sensor valuei which you can find in a signal as shown below.
Record this value In our example 1935mV E Live View: LiveView_20101004_D-GCAD_RH.xml 00x
• A: Fuel pressure hPa mv A: Fuel pressure, raw sensor value
• A: Injection, current quantity
- A: Metering unit, duty cycle 4800-3000 ] A: PCV, duty cycle A: Propeller speed A: Rail pressure, governor deviation A: Rail pressure, peak value of last 10ms A: Rail pressure, sensor raw signal voltage A: Hail pressure, set point
• B: Fuel pressure | B: Fuel temperature 4000-2501 B: Metering unit, duty cycle
• B: PCV, duty cycle B: Power lever position
• B: Rail pressure, governor deviation
• B: Rail pressure, peak value of last 10ms
- B: Rail pressure, set point 3200-2 2400-1500 About 20seconds 25 - 35 45 50 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.
Prepared: B. Jäger Checked: G. Fritz Date: 07.10.2010 Date: 07.10.2010
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 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 configuration has to be restored.
5 Referenced Documents # Maintenance Manual latest effective version # Installation Manual latest effective version # Wizard User Guide latest effective version