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DOA no. EASA.21J.399 Mandatory Service Bulletin No. MSB-E4-036/1 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 30 Nov. 2021 1 14 Dec. 2021 13-31 © 2021 by Austro Engine GmbH – AUSTRIA – www.austroengine.at
1.7. Concurrent documents / references Note: If not specified, the latest revision of the referenced documents applies.
• Maintenance Manual E4.08.04
• Service Instruction SI-E4-016
• Service Instruction SI-E4-018
• Mandatory Service Bulletin MSB-E4-034 rev. 1 or subsequent approved revisions
• Mandatory Service Bulletin MSB-E4-035 rev. 0 or subsequent approved revisions
1.8. Other publications affected None
1.9. Credits Inspection and replacement of the HPP driving gear on an engine, accomplished before the effective date of this Mandatory Service Bulletin in accordance with the instructions of MSB -E4-034 Revision 1 or MSB-E4-035, as applicable, are acceptable to comply w ith the requirements of this Mandatory Service Bulletin for that engine, provided no affected cylinder head/HPP driving gear combination has been installed on that engine at any time after that inspection.
DOA no. EASA.21J.399 Mandatory Service Bulletin No. MSB-E4-036/1 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 30 Nov. 2021 1 14 Dec. 2021 14-31 © 2021 by Austro Engine GmbH – AUSTRIA – www.austroengine.at
2. Technical Details
2.1. Removal and inspection of the HPP driving gear
1. Remove the HPP in accordance with the instructions in Maintenance Manual, Doc. No.
E4.08.04, Section 73-10-03, Paragraph A.
2. Remove the drive gear from the HPP in accordance with the instructions in Maintenance Manual, Doc. No. E4.08.04, Section 73-10-03, Paragraph C.
Caution: Use only the tool p/n AE300T012 -1 provided in the kit of this Service Bulletin to block the gear.
3. To remove the gear from the shaft, use a bearing extractor shown in paragraph 3.2
4. Clean the driving gear with non -chlorinated brake cleaner (recommended product Manufacturer: Förch, Product ID.: R510)
5. Visually inspect the driving gear against colour criteria of Appendix II Table 6; i f the acceptable criteria are not met:
o remove the camshafts according to the M aintenance Manual, Doc. No. E4.08.04, Section 85-30-00 Subparagraph 4A (a) - (h) o Inspect the HPP shaft, the cylinder head, camshaft gear, the inlet/outlet camshaft bushing in accordance with the Appendix II of this service bulletin and replace the parts as necessary.
2.2. Installation of the new HPP driving gear
2.2.1 Driving Gear p/n E4A-30-000-201 rev. AB1 or p/n E4A-30-000-601
Caution: DO NOT INSTALL the gear p/n E4A-30-000-201 rev. AB1 or E4A-30-000-601 if a Cylinder Head p/n E4A-12-500-000 is installed on the engine
1. Install the new drive gear in accordance with the instructions in Maintenance Manual, Doc.
No. E4.08.04, Section 73-10-03, Paragraph D (replace the nut, if required).
Note: Lubricate the gear and the O-ring with engine oil before installing the HPP
Caution: Use only the tool p/n AE300T012-1 provided in the kit of this Service Bulletin to block the gear
2. Install the HPP in accordance with the instructions in Maintenance Manual, Doc. No.
E4.08.04, Section 73-10-03, Paragraph B. Refer also to chapter 6 Table 2 for the tightening sequence of the screws.
3. Mark a tool cycle on the Tool Cycle Recording Sheet and fill the execution report (both included in the chapter 6 of this Service Bulletin).
4. Do the engine ground run in accordance with the Engine Maintenance Manual Note: One cycle equals the disassembly of the old gear and the installation of the new gear
Caution: When the assembly tool p/n AE300T012-1 has reached 100 cycles, discard the tool
DOA no. EASA.21J.399 Mandatory Service Bulletin No. MSB-E4-036/1 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 30 Nov. 2021 1 14 Dec. 2021 15-31 © 2021 by Austro Engine GmbH – AUSTRIA – www.austroengine.at
2.2.2 Driving gear p/n E4A-30-000-201 Rev. AE.1 or subsequent
1. Install the new drive gear in accordance with the instructions in Maintenance Manual, Doc.
No. E4.08.04, Section 73-10-03, Paragraph D (replace the nut, if required).
Note: Use a standard low-profile open-ended wrench (27 mm) instead of the special tool.
Note: Lubricate the gear and the O-ring with engine oil before installing the HPP
2. Install the HPP in accordance with the instructions in Maintenance Manual, Doc. No.
E4.08.04, Section 73-10-03, Paragraph B. Refer also to chapter 6 Table 2 for the tightening sequence of the screws.
3. Do the engine ground run in accordance with the Engine Maintenance Manual
2.3. Illustrations Provided as appendix to this service bulletin
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.
DOA no. EASA.21J.399 Mandatory Service Bulletin No. MSB-E4-036/1 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 30 Nov. 2021 1 14 Dec. 2021 16-31 © 2021 by Austro Engine GmbH – AUSTRIA – www.austroengine.at
3. Planning Information
3.1. Material & Availability Quantity Part Description Part Number 1 HPP Drive Gear E4A-30-000-601(1) or E4A-30-000-201 Rev. AB.1(1) or E4A-30-000-201 Rev. AE.1 1 Gasket DIN7603-12x16x2.0 1 Gasket DIN7603-A12x16-AL 1 Holder wrench HPP AE300T012-1
(1)Caution: DO NOT INSTALL the gear p/n E4A -30-000-201 rev. AB1 or E4A -30-000-601 if a Cylinder Head p/n E4A-12-500-000 is installed on the engine
Caution: The holder wrench HPP p/n AE300T012-1 can be used for only for 100 cycles, after that the tool is not serviceable and must be scraped.
Note: One cycle equals the disassembly of the old gear and the installation of the new gear
Figure 1 – Driving gear E4A-30-000-201 Rev. AE.1
3.2. Special tools No. Description Note 1 Holder wrench HPP This special tool is provided as part of this SB and it is limited to 100 cycles 2 Bearing extractor Refer to Figure 2 (not part of the service bulletin kit)
Figure 2 – Bearing extractor
DOA no. EASA.21J.399 Mandatory Service Bulletin No. MSB-E4-036/1 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 30 Nov. 2021 1 14 Dec. 2021 17-31 © 2021 by Austro Engine GmbH – AUSTRIA – www.austroengine.at
3.3. Labor effort 2 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 chapter 2 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 1.6 o In case of doubt please contact the Austro Engine GmbH – After Sales 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)
DOA no. EASA.21J.399 Mandatory Service Bulletin No. MSB-E4-036/1 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 30 Nov. 2021 1 14 Dec. 2021 18-31 © 2021 by Austro Engine GmbH – AUSTRIA – www.austroengine.at
5. Explanatory notes
5.1. Symbol explanation
WARNING: Disregarding these safety rules can cause personal injury or even death
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
DOA no. EASA.21J.399 Mandatory Service Bulletin No. MSB-E4-036/1 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 30 Nov. 2021 1 14 Dec. 2021 19-31 © 2021 by Austro Engine GmbH – AUSTRIA – www.austroengine.at
6. Appendix I Table 2 – HPP tightening sequence
Figure 3 Install the HPP tightening the screws clockwise, according to the Figure 3 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%
CAUTION: DO NOT over torque
Table 3 – HPP Wrench Cycles recording sheet
HPP Wrench Cycles recording sheet Note:
For each cycle, mark a cross on the corresponding box. When 100 cycles are reached, discard the wrench.
1 Gear replacement (removal & installation) = 1 cycle 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 HPP Drive gear wrench p/n
DOA no. EASA.21J.399 Mandatory Service Bulletin No. MSB-E4-036/1 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 30 Nov. 2021 1 14 Dec. 2021 20-31 © 2021 by Austro Engine GmbH – AUSTRIA – www.austroengine.at Table 4 – Service Bulletin Execution Report (SBER)
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 Removed HPP Gear s/n:
Or Inspected HPP p/n and s/n:
Refer to the figure below to identify the serial number NOTE: A scanned version of this form must be provided to:
service@austroengine.at copy to:
support-austria@diamondaircraft.com support-canada@diamondaircraft.com support@wfjt.com NOTE: The original filled version of this form, must be packed with the removed gear, and provided to Austro Engine
Figure 4 – Gear s/n location
Figure 5 – HPP p/n and s/n location
DOA no. EASA.21J.399 Mandatory Service Bulletin No. MSB-E4-036/1 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 30 Nov. 2021 1 14 Dec. 2021 21-31 © 2021 by Austro Engine GmbH – AUSTRIA – www.austroengine.at
7. Appendix II Table 5 - HPP Driving gear assembled - 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
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DOA no. EASA.21J.399 Mandatory Service Bulletin No. MSB-E4-036/1 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 30 Nov. 2021 1 14 Dec. 2021 22-31 © 2021 by Austro Engine GmbH – AUSTRIA – www.austroengine.at
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
DOA no. EASA.21J.399 Mandatory Service Bulletin No. MSB-E4-036/1 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 30 Nov. 2021 1 14 Dec. 2021 23-31 © 2021 by Austro Engine GmbH – AUSTRIA – www.austroengine.at Table 6 - HPP Driving Gear Disassembled - Inspection chart
Fig. 21
Fig. 22
Fig. 23
Fig. 24 Examples of gear in acceptable conditions
Fig. 25
Fig. 26
Fig. 27
Fig. 28 Examples of gear in not acceptable condition
Fig. 29
Fig. 30
Fig. 31
Fig. 32 Examples of gear in not acceptable condition YES NO Consultation with AE required Part 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 and in the marking zone 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
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DOA no. EASA.21J.399 Mandatory Service Bulletin No. MSB-E4-036/1 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 30 Nov. 2021 1 14 Dec. 2021 24-31 © 2021 by Austro Engine GmbH – AUSTRIA – www.austroengine.at Table 7 - Camshaft/camshaft gear - Camshaft inlet/outlet bearing - Cylinder head – HPP Shaft inspection chart
Fig. 33
Fig. 34
Fig. 35
Fig. 36 Examples of normal wear of the cylinder head at camshaft bearings
Fig. 37
Fig. 38
Fig. 39
Fig. 40 Examples of normal wear of the cylinder head at camshaft bearings
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