Austro Engine MSB MSB-E4-017/2: Revision 2, text

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Page 1Open in PDF

Mandatory Service Bulletin No. MSB-E4-017/2 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.

1. BASIC INFORMATION

SUBJECT Check/Replacement of timing chain.

ENGINES AFFECTED Type: E4

Model(s): E4

Serial number(s): All REASON On a few engines considerable wear of the timing chain has been detected, which could lead to a fracture of the timing chain and a subsequent loss of power. The check of the condition of the timing chain including instructions for replacing the timing chain and the chain wheel if applicable are given in the maintenance manual of the E4 engine.

Windmilling restarts cause high stress onto the timing chain. Therefore, windmilling restarts as part of normal operation has already been removed from the Operation Manual. In addition, a mandatory timing chain replacement for engines with known in-flight restarts by wind milling has been defined.

Page 2Open in PDF

Mandatory Service Bulletin No. MSB-E4-017/2 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.

TIME OF COMPLIANCE For engines with known windmilling restarts:

At 900 hours operation time of the timing chain replace the timing chain.

NOTE: For timing chains with more than 900 hours operation time replace the timing chain within the next 100 hours operation time.

NOTE: Prior compliance with MSB-E4-017 and MSB-E4-017/1 does not preclude compliance with this MSB for airplanes with known windmilling restarts.

For engine without known windmilling restarts:

Check the timing chain in the scheduled maintenance intervals according to Maintenance Manual E4.08.04 section 05-20-00.

CONCURRENT DOCUMENTS / REFERENCES Maintenance Manual – Doc. No.: E4.08.04, latest effective issue MM-TR-MDC-E4-396

Operation Manual – Doc. Nos.: E4.01.01, latest effective issue OM-TR-MDC-E4-359b

OTHER PUBLICATIONS AFFECTED None.

Page 3Open in PDF

Mandatory Service Bulletin No. MSB-E4-017/2 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.

2. TECHNICAL DETAILS

ACCOMPLISHMENT For engines with known windmilling restarts:

 Make sure Maintenance Manual E4.08.04 revision 26 or hig her is used and MM-TR-MDC-E4-396 is inserted into the Maintenance Manual E4.08.04.

 Replace the timing chain according to section 85-40-50 and subs equent of the Maintenance Manual E4.08.04.

 Make sure OM -TR-MDC-E4-359b is i nserted into the Operation Manual E4.01.01 or a revision of the OM with the Temporary Revision incorporated is used.

 For engines installed in airplanes with normal operation procedures for inflight restart, make sure that an applicable Temporary Revision (e.g. TR-MÄM-42-973) is inserted into the Airplane Flight Manual (AFM) that lists windmilling only as an emergency operation procedure.

For engines without known windmilling restarts:

 Make sure Maintenance Manual E4.08.04 revision 26 or hig her is used and MM-TR-MDC-E4-396 is inserted into the Maintenance Manual E4.08.04.

 Check the timing chain according to section 85-40-40 and subsequent of the Maintenance Manual E4.08.04.

 Make sure OM -TR-MDC-E4-359b is in serted into the Operation Manual E4.01.01 or a revision of the OM with the Temporary Revision incorporated is used.

ILLUSTRATIONS None.

MASS (WEIGHT) Not affected.

APPROVAL STATEMENT The technical content of this document has been approved under the authority of DOA ref. EASA.21J.399.

Page 4Open in PDF

Mandatory Service Bulletin No. MSB-E4-017/2 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.

3. PLANNING INFORMATION

MATERIAL & AVAILABILITY Required material for checking the tension of the timing chain:

E4 Engine configuration Amount Part Name Part Number Rev. Number -A -B/-C 1 Seal Boost Pressure Manifold E4A-04-000-004 000 X 1 Seal Alu E4A-75-600-401 000 X X

Required material if the timing chain and the timing chain wheel have to be replaced:

Amount Part Name Part Number Rev. Number 6 Toothed Washer DIN 6797 A6,4-VZ --- 2 Ring Seal DIN 7603-C12x16x2 CU --- 4 Ring Seal E4A-03-000-801 000 4 Screw (Injector Fixing) E4A-03-000-802 000 1 Seal Boost Pressure Manifold E4A-04-000-004 000 3 O-Ring Oil Return Line E4A-05-000-103 000 1 Seal Oil Return Line E4A-05-000-104 000 1 Chain wheel E4A-07-000-101 000 3 Screws for chain wheel E4A-07-000-402 000 1 O-Ring Sensor Housing CAS 2 DIN 3771-84x4xFPM70 --- 1 Timing chain, open version E4A-75-100-000 020

Page 5Open in PDF

Mandatory Service Bulletin No. MSB-E4-017/2 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.

SPECIAL TOOLS Required material for checking the tension of the timing chain:

Amount Part Name Part Number 1 Timing chain measuring tool AEP-00150

Required material if the timing chain and the timing chain wheel have to be replaced:

Amount Part Name Part Number 1 Camshaft adjusting tool AE300T009 1 Sealant Pistol AE300T027 1 Sealant (black) AE300T028*) 1 Grease for Injectors AE300T029 1 Chain guiding bar AEP-00139 1 Chain opening tool AEP-00158 1 Chain closing tool AEP-00159 1 Chain coupling AEP-00160

*) Alternatively Loctite 5970 can be used.

LABOR EFFORT Not specified; conducted during line maintenance.

CREDIT None.

Page 6Open in PDF

Mandatory Service Bulletin No. MSB-E4-017/2 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.

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 TECHNICAL DETAILS 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 to section 1 TIME OF COMPLIANCE.

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).

Page 7Open in PDF

Mandatory Service Bulletin No. MSB-E4-017/2 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.

5. EXPLANATORY NOTES

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.

6. APPENDIX

None