# Austro Engine Mandatory Service Bulletin MSB-E4-042: No revision named, from page 13

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- Document: [Austro Engine Mandatory Service Bulletin MSB-E4-042](https://openairdocs.org/service-documents/austro-engine/msb-e4-042.md)
- Title as filed: Austro Engine Work Instruction MSB-E4-042
- Pages: 18
- PDF: https://openairdocs.org/files/sha256/02/b1/02b1af339447f299a0c9d2eb871fff6c269550645accc61dea0aa126b73a6a53
- Page: https://openairdocs.org/service-documents/austro-engine/msb-e4-042/file/02b1af339447

## Text

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### Page 13

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

### Page 14

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 
 
03

### Page 15

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

### Page 16

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.

### Page 17

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.

### Page 18

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

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