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Title:
Work Instruction Doc. No.:
WI-MSB-E4-042 Rev.: 0
Page 13 of 18 Type:
E4 Series Subject:
Main bearing screws Replacement
Fig. 15 oil pump screw (1)
Fig. 16 oil pump screw (2)
03 03
Title:
Work Instruction Doc. No.:
WI-MSB-E4-042 Rev.: 0
Page 14 of 18 Type:
E4 Series Subject:
Main bearing screws Replacement
Fig. 17 oil pump screw (3)
2.4.2 Oil pump chain cover installation
➢ Slide the chain cover [02] in place on the oil pump and tighten the screws [01] (ISO8102 -M6x20) (x2) with 12 Nm
Fig. 18 oil pump chain cover installation
02 01
Title:
Work Instruction Doc. No.:
WI-MSB-E4-042 Rev.: 0
Page 15 of 18 Type:
E4 Series Subject:
Main bearing screws Replacement
2.4.3 Oil repellent installation ➢ Place the oil repellent [06] on the crankcase by sliding it underneath the oil pump suction pipe acc. to Fig. 19 ➢ Tighten the screws with the following torques:
7x M6 [07] with 12 Nm and Loctite 243 applied on the thread;
2x M10 [08] and washer with 53 Nm and Loctite 243 applied on the thread.
Fig. 19 oil repellent installation
2.4.4 Oil sump installation ➢ Install the oil sump acc. to the Maintenance Manual E4.08.04, section 79-10-00 Para. 3B.
2.4.5 Final procedures ➢ Fill up the engine oil according to Maintenance Manual, Ch. 79.
➢ Reinstall aircraft related parts acc. to aircraft manufacturers manual ➢ Fill up all operating fluids ➢ Conduct a ground run acc. to Chapter 3
08 06 07 07
Title:
Work Instruction Doc. No.:
WI-MSB-E4-042 Rev.: 0
Page 16 of 18 Type:
E4 Series Subject:
Main bearing screws Replacement
3 Power evaluation after screw replacement
After the main bearing screw replacement procedure as outlined i n Chapter 2 has been carried out, do the following power evaluation procedure:
➢ Start the engine and let it warm up with <20% power lever until all following conditions are reached:
➢ Engine oil temperature >50°C ➢ Coolant temperature >60°C ➢ Gearbox oil temperature >35°C ➢ Conduct engine power evaluation as described in Chapter 1. The data collected before and after replacement can be compared in case of different engine behaviour.
For engine core: compare the data with the ground run performed with the old engine core.
For new engine: compare the data with the previous download.
➢ Cool down the engine (approx. 2min idle) ➢ Shut down the engine ➢ Check entire engine installation for leaks and abnormalities.
Title:
Work Instruction Doc. No.:
WI-MSB-E4-042 Rev.: 0
Page 17 of 18 Type:
E4 Series Subject:
Main bearing screws Replacement
4 Tools and Consumable
Consumable List
Consumables Material definition Parts applicability Sealant MERCEDES BENZ A003989982010 Oil Sump Dow Corning 736 Heat Resistant/Sealant Service lid and fire sleeves No. 5970, alternative 5900 or 5910 Engine sealants Screw lock Loctite No. 243 Loctite No. 2701 or 278 Screw locks For applicability refer to the relevant chapters of this document.
No. 542 Thread sealant Engine seala Grease Lubricant (acid-free lubrication) Released AE300 engine oils which are defined in the AE300 Operation Manual.
O-ring and Rubber Gaskets Safety wire Suitable for flight purposes stainless safety wire. Wire thickness 0.81 mm For applicability refer to the relevant chapters of this manual Cleaning agent customary brake cleaner parts cleaning
Refer also to the Maintenance Manual E4.08.04.
Title:
Work Instruction Doc. No.:
WI-MSB-E4-042 Rev.: 0
Page 18 of 18 Type:
E4 Series Subject:
Main bearing screws Replacement
5 Shipping Info
Removed parts shall be quarantined for 6 month and eventually destroyed.
6 Remarks
NOTE:
➢ All measures must be carried out by an authorized diamond service center.
➢ The accomplishment of the instructions shown must be confirmed in the respective engine log book.
➢ Replace the main bearing screws in accordance with MSB-E4-042 and mark the Service Bulletin as executed in the engine logbook and via Diamond Partners Portal;
➢ In case of doubt, please contact Austro Engine GmbH via the Diamond Partners Portal o If you are not a Diamond Partner / Service Centre, please contact a Diamond Authorized Service Centre near you.
7 Referenced Documents
- Maintenance Manual, Doc. E4.08.04, latest revision
- MSB-E4-042, latest revision
8 Appendix
None