# Austro Engine Mandatory Service Bulletin MSB-E4-022: MSB-E4-022_3 - Rights: © Austro Engine. Filed by the FAA in regulations.gov docket FAA-2019-0664, the docket of AD 2020-22-14. Not covered by OpenAirDocs’ CC0 dedication. - Document: [Austro Engine Mandatory Service Bulletin MSB-E4-022](https://openairdocs.org/service-documents/austro-engine/msb-e4-022.md) - Title as filed: MSB-E4-022_3 - Pages: 5 - PDF: https://openairdocs.org/files/sha256/80/0c/800c60417c262407f5b591d8571195c71a68b811f156c392e163bbd027da1105 - Page: https://openairdocs.org/service-documents/austro-engine/msb-e4-022/file/800c60417c26 ## Text Each page's text from the PDF; open the PDF at a page with #page=N. ### Page 1 Mandatory Service Bulletin No. MSB-E4-022/3 Austro Engine GmbH Rudolf-Diesel-Strasse 11 2700 Wiener Neustadt PHONE: +43 2622 23000 FAX: +43 2622 23000-2711 First Issue Date Rev. No. Revision Date Page 02 Nov 2017 03 16 Apr 2018 1-5 © 2017 by Austro Engine GmbH – AUSTRIA – www.austroengine.at SUPERSEDES MSB-E4-022/2 1. BASIC INFORMATION 1.1. SUBJECT Waste Gate Control Rod. 1.2. ENGINES AFFECTED Engine type: E4 Engine model(s): E4, E4P Serial number(s): all 1.3. REASON Waste gate control rods with insufficient fatigue life have been identified. Failure of the waste gate control rod will lead to a partial loss of power. As precautionary action Austro Engine prescribes a time limit for the waste gate controllers without waste gate con-rod fail-safe bridge. As terminating action for the time limit the waste -gate control-rod fail-safe bridge has been introduced. After installation of the waste -gate control-rod fail-safe bridge the waste -gate controller is set on condition with specified scheduled maintenance c hecks per Maintenance Manual. 1.4. TIME OF COMPLIANCE Initial action:  Upon reaching 250 flight hours in service time of the waste gate controller  For E4-B and E4-C engines installed on DA 42 M-NG with external containers and E4-A engines: For waste-gate controllers with more than 200 flight hours as of 27-Nov-2017 within the next 50 flight hours, but not later than 28-Feb-2018 if 250 flight hours in service time of the waste gate controller are exceeded as of 28-Feb-2018.  All other engines: For waste-gate controllers with more than 200 flight hours as of 27-Nov-2017 within the next 100 flight hours, but not later than 31-May-2018 if 250 flight hours in service time of the waste gate controller are exceeded as of 31-May-2018. ### Page 2 Mandatory Service Bulletin No. MSB-E4-022/3 Austro Engine GmbH Rudolf-Diesel-Strasse 11 2700 Wiener Neustadt PHONE: +43 2622 23000 FAX: +43 2622 23000-2711 First Issue Date Rev. No. Revision Date Page 02 Nov 2017 03 16 Apr 2018 2-5 © 2017 by Austro Engine GmbH – AUSTRIA – www.austroengine.at Repetitive Action:  Upon reaching 250 flight hours in service time of the waste gate controller Terminating Action:  Within 200 flight hours after 30-Apr-2018, but not later than 31-Oct-2018 Prior compliance with MSB-E4-022 through MSB-E4-022/2 is considered equivalent to the initial action or repetitive action, as applicable. 1.5. CONCURRENT DOCUMENTS / REFERENCES - Maintenance Manual E4 Series – Doc. No.: E4.08.04, latest effective issue 1.6. OTHER PUBLICATIONS AFFECTED None. 2. TECHNICAL DETAILS 2.1. ACCOMPLISHMENT / INSTRUCTIONS Initial Action: 1. Make sure MM-TR-MDC-E4-386 and MM-TR-MDC-E4-399 are inserted into the Maintenance Manual or a revision of the Maintenance Manual with the Temporary Revisions incorporated is used. 2. Replace the waste gate controller according to Maintenance Manual section 81-00- 33. 3. Install a new the spring loaded circlip E4A-41-100-801. Refer to figure 4 Repetitive Action: 1. Replace the waste gate controller according to Maintenance Manual section 81-00- 33. 2. Install a new the spring loaded circlip E4A-41-100-801. Refer to figure 4. ### Page 3 Mandatory Service Bulletin No. MSB-E4-022/3 Austro Engine GmbH Rudolf-Diesel-Strasse 11 2700 Wiener Neustadt PHONE: +43 2622 23000 FAX: +43 2622 23000-2711 First Issue Date Rev. No. Revision Date Page 02 Nov 2017 03 16 Apr 2018 3-5 © 2017 by Austro Engine GmbH – AUSTRIA – www.austroengine.at Terminating Action: 1. Make sure MM-TR-MDC-E4-422 is inserted into the Maintenance Manual or a revision of the Maintenance Manual with the Temporary Revisions incorporated is used. 2. If not yet installed, install a new spring loaded circlip E4A-41-100-801. Refer to figure 4. 3. Install the waste-gate con-rod fail-safe bridge according to Maintenance Manual section 81-00-36 or install a waste-gate controller with the fail-safe con-rod bridge already installed. Make sure there is sufficient clearance to adjacent parts. Figure 4: Waste Gate Circlip 2.2. MASS (WEIGHT) Negligible. 2.3. APPROVAL STATEMENT The technical content of this document has been approved under the authority of DOA No. EASA.21J.399. ### Page 4 Mandatory Service Bulletin No. MSB-E4-022/3 Austro Engine GmbH Rudolf-Diesel-Strasse 11 2700 Wiener Neustadt PHONE: +43 2622 23000 FAX: +43 2622 23000-2711 First Issue Date Rev. No. Revision Date Page 02 Nov 2017 03 16 Apr 2018 4-5 © 2017 by Austro Engine GmbH – AUSTRIA – www.austroengine.at 3. PLANNING INFORMATION 3.1. MATERIAL & AVAILABILITY For replacement of the waste-gate controller: Qty Part Number Description 1 E4A-41-120-000 Waste Gate Controller 1 E4A-41-100-801 Spring loaded circlip For the terminating action: Qty Part Number Description 1 E4A-41-100-801 Spring loaded circlip (if not yet installed) 1 AEP-00265-100 Bracket Assy 1 1 AEP-00265-100 Bracket Assy 2 2 AEP-00247-801 Screw with drill hole 2 E4A-53-300-801 Screw with drill hole 3.2. SPECIAL TOOLS As stated in the Maintenance Manual E4.08.04. 3.3. LABOR EFFORT 0.5 hours. ### Page 5 Mandatory Service Bulletin No. MSB-E4-022/3 Austro Engine GmbH Rudolf-Diesel-Strasse 11 2700 Wiener Neustadt PHONE: +43 2622 23000 FAX: +43 2622 23000-2711 First Issue Date Rev. No. Revision Date Page 02 Nov 2017 03 16 Apr 2018 5-5 © 2017 by Austro Engine GmbH – AUSTRIA – www.austroengine.at 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 2.1 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 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) 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. 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