Austro Engine Engine Mandatory Service Bulletin MSB-E4-035/1: Revision 1, text

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Page 1Open in PDF

Mandatory Service Bulletin No. MSB-E4-035/1 Austro Engine GmbH Rudolf-Diesel-Strasse 11 A-2700 Wiener Neustadt Tel: +43 2622 23000 FAX: +43 2622 23000-2711

MANDATORY

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1. BASIC INFORMATION

1.1. SUBJECT High Pressure Pump driving gear inspection

1.2. RECORD OF REVISIONS REV. NO DATE REASON 0 10-Sep-2021 First issue

1 30-Sep-2021 The possibility for a ferry flight for twin engine airplanes is added;

A typo in section 2.1 is corrected;

Instructions for inspection of cylinder head, camshaft, camshaft gear, and camshaft bearings added;

Labour effort updated.

1.3. DEFINITIONS AND ACRONYMS For the purpose of this Service Bulletin, the following definitions and acronyms apply:

Affected part: High Pressure Pump driving gear Fh: flight hours HPP: High Pressure pump p/n or p/ns: Part number or Part Numbers SB: Service Bulletin s/n or s/ns: Serial Number or Serial Numbers

Page 2Open in PDF

Mandatory Service Bulletin No. MSB-E4-035/1 Austro Engine GmbH Rudolf-Diesel-Strasse 11 A-2700 Wiener Neustadt Tel: +43 2622 23000 FAX: +43 2622 23000-2711

1.4. ENGINES AFFECTED Engine affected: E4 Series Serial numbers affected (2): All E4/E4P engine s/ns having a Cylinder Head part number E4A-12-500-000 installed (1) Part Affected: High Pressure Pump driving gear

(1) Note: To identify the cylinder head installed, refer to the maintenance manual E4.08.04 chapter 85. Additional Cylinder Head identification methods are provided in the Service Instruction no. SI-E4-016

(2) Note: Replacement of a High-Pressure Pump driving gear accomplished in accordance with the instruction of the Mandatory Service Bulletin no. MSB-E4-034 at revision 1 (or subsequent approved revision), is ac ceptable to comply with the requirements of paragraph 2.1 of this Service Bulletin for that engine.

1.5. REASON Stack up of tolerances between the Cylinder Head (CH), CH cover, Camshaft Gear and High- Pressure Pump (HPP) gear is found for those engines having a Cylinder Head part number E4A- 12-500-000 installed. This condition, if not detected, could result in premature failure of the HPP drive gear resulting in rail pressure loss and engine shutdown.

1.6. TIME OF COMPLIANCE Before the next flight

Note: For a twin -engine aeroplane that has one or two affected E4B/C/P engine(s) installed, a single ferry flight is permitted to bring the aeroplane to a location where the actions required by this Service Bulletin can be accomplished on the affected engines.

1.7. CONCURRENT DOCUMENTS / REFERENCES If not specified, the latest revision of the concurrent/referenced documents applies

• Maintenance Manual E4.08.04

• Service Instruction SI-E4-016

• Mandatory Service Bulletin MSB-E4-034 rev. 1 or subsequent approved revisions

1.8. OTHER PUBLICATIONS AFFECTED None

Page 3Open in PDF

Mandatory Service Bulletin No. MSB-E4-035/1 Austro Engine GmbH Rudolf-Diesel-Strasse 11 A-2700 Wiener Neustadt Tel: +43 2622 23000 FAX: +43 2622 23000-2711

2. TECHNICAL DETAILS

2.1. ACCOMPLISHMENT / INSTRUCTIONS

1. Remove the HPP in accordance with the instruction provided in the Maintenance Manual, chapter 73-10-03 paragraph A

2. Clean the driving gear with Non-chlorinated brake cleaner (recommended product Manufacturer: Förch, Product ID.: R510)

3. Visually inspect the driving gear against colour criteria provided in the Appendix II table 1 and general condition (excessive wear, scratches):

Note: The gear should not be removed to perform the inspection What to do if the Gear is in acceptable condition?

What to do if the Gear is NOT in acceptable condition?

If the gear is in acceptab le conditions, then proceed to Step 4 Take an oil sample and send it for analysis.

Remove the camshafts – refer to Maintenance Manual, Doc. No. E4.08.04, Section 85-30-00 Subparagraph 4A (a) - (h) Inspect in acc ordance w ith criteria provided in the Appendix 2 table 2:

• The camshaft and the camshaft gear

• The inlet / outlet bearings of the camshaft

• The cylinder head Replace The HPP driving gear and If required, based on inspection results, the parts lis ted in the point above (ref. to the process summarisation flowchart).

Note: In case of doubt, contact Austro Engine providing pictures of the driving gear

4. Reinstall the HPP in accordance with the instruction provided in the Maintenance Manual, chapter 73-10-03 paragraph B referring to the table 3 for the tightening sequence of the screws

5. Fill the execution report and send it back to service@austroengine.at

Page 4Open in PDF

Mandatory Service Bulletin No. MSB-E4-035/1 Austro Engine GmbH Rudolf-Diesel-Strasse 11 A-2700 Wiener Neustadt Tel: +43 2622 23000 FAX: +43 2622 23000-2711

Figure 1 Install the HPP tightening the screws clockwise, according to the figure 1 sequence with 12 Nm.:

- Step 1 – 1 at 50%

- Step 2 – 2 at 50%

- Step 3 – 3 at 50%

- Step 4 - 1 at 100%

- Step 5 - 2 at 100%

- Step 6 - 3 at 100% 1 3 2

Page 5OCROpen in PDF

Austro Engine GmbH Austro Engine Mandatory Service Bulletin A-2700 Wiener Neustadt Rudolf-Diesel-Strasse 11 No. MSB-E4-035/1 Tel: +43 2622 23000 FAX: +43 2622 23000-2711 MSB-E4-035 Process summarised Is the CH p/n —NO- E4A-12-500-000 Installed?

END *NO- Is MSB-E4-034 applicable?

YES Remove the HPP YES Inspect the driving Perform MSB-E4-034 gear against colour criteria Is the Gear in -NO acceptable conditions?

Go to YES Reinstall the HPP

RELEASE TO

Page 6OCROpen in PDF

JAustro Engine Mandatory Service Bulletin No. MSB-E4-035/1 Austro Engine GmbH A-2700 Wiener Neustadt Tel: +43 2622 23000 Rudolf-Diesel-Strasse 11 FAX: +43 2622 23000-2711 Replace the HPP driving Gear Inspect the camshaft and the camshaft gear Remove the parts according to the latest revision of the maintenance Inspect the bearing Replace manual, then inlet/outlet camshaft those parts if inspect against necessary the criteria provided in this SB Inspect the cylinder head is the HPP Gear NO p/n E4A-30-000-201 rev. AE1 or subsequent installed?

YES Perform an engine Perform an engine ground run (5min. ground run according to MTOP) Maintenance Manual Remove the HPP and inspect the gear Is the Gear in RELEASE NO acceptable -YES→ TO conditions? SERVICE First Issue Date Rev. No. Revision Date Page 10 Sep 2021 1 30 Sep 2021 6-19 © 2021 by Austro Engine GmbH - AUSTRIA - www.austroengine.at

Page 7Open in PDF

Mandatory Service Bulletin No. MSB-E4-035/1 Austro Engine GmbH Rudolf-Diesel-Strasse 11 A-2700 Wiener Neustadt Tel: +43 2622 23000 FAX: +43 2622 23000-2711

2.2. CREDIT/COMPLIANCE Replacement of a High-Pressure Pump driving gear accomplished in accordance with the instruction of the Mandatory Service Bulletin no. MSB-E4-034 at revision 1 (or subsequent approved revision), is acceptable to comply with the requirem ents of paragraph 2.1 of this Service Bulletin for that engine.

2.3. ILLUSTRATIONS None.

2.4. MASS (WEIGHT) Not affected.

2.5. APPROVAL STATEMENT The technical content of this document is approved under the authority of the DOA ref.

EASA.21J.399.

Page 8Open in PDF

Mandatory Service Bulletin No. MSB-E4-035/1 Austro Engine GmbH Rudolf-Diesel-Strasse 11 A-2700 Wiener Neustadt Tel: +43 2622 23000 FAX: +43 2622 23000-2711

3. PLANNING INFORMATION

3.1. MATERIAL & AVAILABILITY None

3.2. SPECIAL TOOLS None

3.3. LABOR EFFORT

0.5 Hours for an acceptable gear up to 16 hours for a non -acceptable gear that requires additional inspections and/or parts replacement. The exact time depends on the components that might require replacement and do not include the waiting time between correspondence.

4. REMARKS

NOTE:

o All measures must be carried out by a certified engine station and certified engine mechanics.

o The accomplishment of the instructions shown under Section 2.1 must be confirmed in the respective engine log book.

o The accomplishment of the instructions must be carried out within the time of compliance according chapter 1.

o In case of doubt please contact the Austro Engine GmbH – After Sal es Support (e-mail: service@austroengine.at; Tel: +43 2622 23000 2525).

o For credit information contact Austro Engine GmbH – After Sales Support (e-mail: service@austroengine.at; Tel: +43 2622 23000 2525)

5. EXPLANATORY NOTES

5.1. SYMBOL EXPLANATION

CAUTION: Disregarding these special instructions and safety measures can cause damage to the engine or other components.

NOTE: Additional note or instruction for better understanding of an instruction

Page 9Open in PDF

Mandatory Service Bulletin No. MSB-E4-035/1 Austro Engine GmbH Rudolf-Diesel-Strasse 11 A-2700 Wiener Neustadt Tel: +43 2622 23000 FAX: +43 2622 23000-2711

6. APPENDIX I – SERVICE BULLETIN EXECUTION REPORT

Service Bulletin Execution Report Note:

Aircraft owner:

Aircraft Operator: If different from the owner Aircraft:

Aircraft Serial Number:

Aircraft Marks:

Engine (RH) s/n: For single engine a/c, fill only one row Engine (LH) s/n:

Flight Hours:

Service center: Company Name or reference of the person(s) performing the oil pump replacement Inspected HPP s/n: Refer to the figure 2 below to identify the serial number NOTE: A scanned version of this form must be provided to service@austroengine.at NOTE: The original filled version of this form, must be packe d with the rem oved gear, and provided to Austro Engine

Figure 2 – HPP p/n and s/n location

Page 10Open in PDF

Mandatory Service Bulletin No. MSB-E4-035/1 Austro Engine GmbH Rudolf-Diesel-Strasse 11 A-2700 Wiener Neustadt Tel: +43 2622 23000 FAX: +43 2622 23000-2711

7. APPENDIX II – INSPECTION REPORT

Table 1 – HPP Driving inspection chart

Fig. 1

Fig. 2

Fig. 3

Fig. 4 Examples of HPP gear in acceptable conditions

Fig. 5

Fig. 6

Fig. 7

Fig. 8 Examples of HPP gear in not acceptable condition

Fig. 9

Fig. 10

Fig. 11

Fig. 12 Examples of HPP gear in not acceptable condition X X X X X X X X √ √ √ √

Page 11Open in PDF

Mandatory Service Bulletin No. MSB-E4-035/1 Austro Engine GmbH Rudolf-Diesel-Strasse 11 A-2700 Wiener Neustadt Tel: +43 2622 23000 FAX: +43 2622 23000-2711

Fig. 13

Fig. 14

Fig. 15

Fig. 16 Examples of HPP gear in not acceptable condition

Fig. 17

Fig. 18

Fig. 19

Fig. 20 Examples of HPP gear in not acceptable condition

YES NO Consultation with AE required HPP Driving gear acceptable:

Note: • The possible discoloration shown in the non-acceptable gears is due to high friction, which generates heat. When present, the typical discoloration is not homogeneous and presents different shades from black/blue to violet/bronze.

• Check the gear according to the discoloration criteria provided.

• Discoloration is clearly visible on the outer surface of the gear.

• Check also for visible discoloration on the face of the teeth.

• Check for excessive wear of the gear.

In case of doubt, fill the Appendix III and contact Austro Engine

X X X X X X X X

Page 12Open in PDF

Mandatory Service Bulletin No. MSB-E4-035/1 Austro Engine GmbH Rudolf-Diesel-Strasse 11 A-2700 Wiener Neustadt Tel: +43 2622 23000 FAX: +43 2622 23000-2711

First Issue Date Rev. No. Revision Date Page 10 Sep 2021 1 30 Sep 2021 12-19 © 2021 by Austro Engine GmbH – AUSTRIA – www.austroengine.at Table 2 – Camshaft/camshaft gear – Camshaft inlet/outlet bearings - Cylinder head inspection chart

Fig. 21

Fig. 22

Fig. 23

Fig. 24 Examples of normal wear of the cylinder head at camshaft bearings

Fig. 25

Fig. 26

Fig. 27

Fig. 28 Examples of normal wear of the cylinder head at camshaft bearings √ √ √ √ √ √ √ √

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