Diamond Aircraft Industries GmbH N. A. Otto

- Straße 5 A

- 2700 Wiener Neustadt Austria DAI MSB 42

- 095 DAI MSB 42NG

- 026 Page 1 of 4 11

- Nov

- 2011 

# MANDATORY SERVICE BULLETIN

M SB 42

- 095 M SB 42NG

- 026

I TECHNICAL DETAILS

I.1 Category Mandatory

. I.2 Airplanes affected Type: DA 42, DA 42 M, DA 42 NG, DA 42 M

- NG Serial numbers: 42.004 through 42.321, 42.324 through 42.347, 42.349, 42.351, 42.353 through 42.357, 4 2.359 through 42.386, 42.388, 42.389, 42.391, 42.394, 42.396, 42.399, 42.405 through 42.409, 42.412 through 42.416, 42.427, 42.AC001 through 42.AC152, 42.M001 through 42.M011, 42.M015 through 42.M019, 42.M021, 42.M022, 42.N001 through 42.N011, 42.N013, 4 2.N018, 42.N019, 42.N023 through 42.N028, 42MN001 through 42.MN008 provided that damper D60

- 3277

- 10

- 00_01 has NOT been installed on both MLG legs
I.3 Date of effectivity
1 1

- Nov

- 2011
I.4 Time of Compliance
Within 200 flight hours, but not later than 31

- Dec

- 2012

. I.5 S ubject Replacement of MLG damper nut

. ATA

- Code: 32

- 10
I.6 Reason In one case the nut in the MLG damper has loosened itself during operation. This might lead to the MLG leg getting jammed in the gear bay

. This Service Bulletin describes the work necessary to se cure the nut in the MLG damper. Note: Diamond Aircraft Industries recommends doing RSB 42

- 089 / RSB 42NG

- 017 . The measures prescribed by this service bulletin are included in RSB 42

- 089 / RSB 42NG

- 017

.Diamond Aircraft Industries GmbH N. A. Otto

- Straße 5 A

- 2700 Wiener Neustadt Austria DAI MSB 42

- 095 DAI MSB 42NG

- 026 Page 2 of 4 11

- Nov

- 2011

I.7 Concurrent Documents
None.
I.8 Approval
The technical info rmation or instructions contained in this document relate to the Design Change Advisory No. M ÄM 42

- 434 , which has been approved under the authority of EASA Design Organization Approval ref. EASA.21J.052. The technical content of this document has been appr oved under the authority of DOA ref. EASA.21J.052.
I.9 Accomplishments / Instructions
If RSB 42

- 089 / RSB 42NG

- 017 has been done on both MLG dampers : Record MSB 42

- 095 / MSB 42NG

- 026 as performed. Note: Doing RSB 42

- 089 / RSB 42NG

- 017 on both MLG dampers is in cluded in Work Instruction “Conversion to DA 42 NG / M

- NG” Rev. 7 and later. If RSB 42

- 089 / RSB 42NG

- 017 has not been done on both MLG dampers : Comply with WI

- M SB 42

- 095 / MSB 42NG

- 026 , latest effective issue. Note: WI

- MSB 42

- 095 / MSB 42NG

- 026 is attache d to this document. Note: Diamond Aircraft Industries recommends to do RSB 42

- 089 / RSB 42NG

- 017 on both MLG dampers

. The measures prescribed by this service bulletin are included in RSB 42

- 089 / RSB 42NG

- 017

. I.10 Mass (Weight) and CG The change in mass and CG is negligible.


## II PLANNING INFORMATION

II.1 Material and Availability
See WI

- M SB 42

- 095 / MSB 42NG

- 026 , latest effective issue. Materials including drawings are available from Diamond Aircraft Industries.
II.2 Special Tools
None.
II.3 Labour Effort Approx. 2 hours.
II.4 Credit
Fo r all AC within warranty period: 2 man hours of work. Material according to WI

- MSB 42

- 095 / MSB 42NG

- 026 , latest effective issue.Diamond Aircraft Industries GmbH N. A. Otto

- Straße 5 A

- 2700 Wiener Neustadt Austria DAI MSB 42

- 095 DAI MSB 42NG

- 026 Page 3 of 4 11

- Nov

- 2011
II.5 Reference Documents
Diamond Aircraft DA 42 Series Airplane Maintenance Manual, Doc. No. 7

. 01

. 01 , latest effective issue. Dia mond Aircraft DA 42 NG Airplane Maintenance Manual, Doc. No. 7

. 01

. 15 , latest effective issue.


## III REMARKS

1. All work must be done by a certified aircraft service station or a certified aircraft maintenance mechanic. 2. All work , particular those that are no t especi ally described in this S ervice B ulletin, must be done in accordance w ith the referenced Maintenance M anual. 3. Completion of all work must be recorded in the log book. 4. If material and /or labor hours are subject to be credited through Diamond Aircraft Industri es, the Service Bulletin must be carried out by an authorized Diamond Service Center and the Warranty Applicati on incl. Work Report must be sent not later than 30 days after the end of time of compliance. 5. In case of doubt contact Diamond Aircraft Industrie s GmbH.Diamond Aircraft Industries GmbH N. A. Otto

- Straße 5 A

- 2700 Wiener Neustadt Austria DAI MSB 42

- 095 DAI MSB 42NG

- 026 Page 4 of 4 11

- Nov

- 2011



## EXECUTION REPORT TO SERVICE BULLETIN M SB 42
- 095 M SB 42NG
- 026

AIRPLANE DATA Airplane Serial Number:

_________________ Airplane Registration:

_________________ Airplane Operator:

_________________ Hours of operation of airplane:

_________________ No. of landings:

_________________ Hours of operation

- engine : LH

_________________ RH

_________________ Typical operation of airplane: private, club, training, other ______________

__________________________________ Date, Name, Sign

Please fax the completed form to Fax No. +43

- 2622

- 26700

- 1369 or e

- mail to airworthiness@diamond

- air.atDiamond Aircraft Industries GmbH N. A. Otto

- Straße 5 A

- 2700 Wiener Neustadt WI

- M SB 4 2

- 095 WI

- M SB 42NG

- 026

Revision 0 Page 1 of 4 11

- Nov

- 2011 

# WORK INSTRUCTION WI

- M SB 4 2

- 095 / WI

- M SB 42NG

- 026 Replacement of self

- locking nut in MLG damper

I GENERAL INFORMATION

I.1 Subject
Replacement of nut in MLG damper

I.2 Reference Documents

Diamond A ircraft DA 4 2 Series Airplane Maintenance Manual, Doc. No. 7 .02.01 , lat est effective issue. Diamond Aircraft DA 42 NG Airplane Maintenance Manual, Doc. No. 7.02.15 , latest effective issue

.
I.3 Remarks
a) All work must be done by a certified aircraft service station or a certified aircraft maintenance mechanic. b) All work, particular those that are not especially described in this work instruction, must be done in accordance with the referenced maintenance manual. c) For conversion factors between SI and US/Imperial units refer to AMM Chapter 02. d) It is recommended to print this Work Instr uction in color. e) In case of doubt, contact Diamond Aircraft Industries GmbH.



## II DRAWINGS, SPECIAL TOOLS & MATERIALS

II.1 Drawings

D60

- 3277

- 10

- 00_01

II.2 Special Tools
Spacer X00

- W027

- 00

- 00.02 Rev."

- "Diamond Aircraft Industries GmbH N. A. Otto

- Straße 5 A

- 2700 Wiener Neustadt WI

- M SB 4 2

- 095 WI

- M SB 42NG

- 026

Revision 0 Page 2 of 4 11

- Nov

- 2011
II.3 Material
Quantity Part No. Description 2 ORAR00227

- N70 83 O

- Ring 2 MS 28775

- 010 O

- Ring 2 LN 93 4 8

- 0 8 Hexagon nut 2 LN 9348

- 0 6 Hexagon nut 100ml 1U

- 9891 or equivalent Additiv 1U

- 9891 Caterpillar Inc. Materials including special tools are available from Diamond Aircraft Industries.

II.4 Consumable s
Quantity Part No. Des cription Approx. 2 l 3627020L Aero Shell Fluid 41 a. r. Royoco 81MS Greas e Royoco 81MS a. r. 135376 Loctite 262 Consumables may be procured locally or from Diamond Aircraft Industries


## III I NSTRUCTIONS

1 Make sure AMM

- TR

- MÄM

- 42

- 368 and AMM

- TR

- MÄM

- 42

- 447 ar e incorporated into the

AMM

. 2 Remove the LH Main Landing Gear Damper acc. to AMM section 32

- 10.

3 Release nitrogen and oil from the damper.

WARNING : Do not spill Fluid 41 on your skin or on your clothes. Fluid 41 is

harmful and can cause skin dis ease and damage to clothes.
WARNING: Always wear safety glasses. The damper is gas loaded

.

 Install the adapter with drain hose onto t he charging valve of the damper and release the press ure into the suitable container acc. to picture 1.

 Wait until the nitrogen is fully released.

 Push in the damper to minimum position to drain the oil.

Picture 1

4 Remove the charging valve from damper and install spacer

.Diamond Aircraft Industries GmbH N. A. Otto

- Straße 5 A

- 2700 Wiener Neustadt WI

- M SB 4 2

- 095 WI

- M SB 42NG

- 026

Revision 0 Page 3 of 4 11

- Nov

- 2011

5 Remove the bottom cap:

 Remove the bolt holding the bottom cap

.  Pull the bottom cap from the damper assembly.
WARNING: Do not spill Fluid 41 on your skin or on your clothes. Fluid 41 is

harmful and can cause skin disease and damage to clothes.

Note: Catch the residual oil into a suitable container

.

 Clean the cap with acetone

.  Replace the O

- Ring from the cap by new O

- Ring ORAR 00 2 27

- N70 83 and apply a coat of Additiv e 1U

- 9891 on the new O

- Ring.
C aution : Do n o t use steel tools when remov ing the O
- Ring.

Do not scratch the surfaces of the groove
. 6 Remove the nut on the piston end plate

.

7 Install nut LN 9348

- 08 on the piston end plate

. S ecure the connection with L octite 262

i.a.w. drawing D60

- 3277

- 10

- 00_01.

Picture 2 8 Allow Loctite to cure before filling (Minimum cure time 12 hours)

. 9 Install the bottom cap with the bolt, washe r and nut.
10 Remove the spacer from piston tube.
11 Install the charging valve with a new O

- Ring MS 28775

- 010

.

12 Adjust the direction of the piston tube to the cylinder tube acc. to picture 3

.

Note: The charging valve must be aligned with the nut from the bolt holding the

bottom cap

. Piston end plate

Nut

SpacerDiamond Aircraft Industries GmbH N. A. Otto

- Straße 5 A

- 2700 Wiener Neustadt WI

- M SB 4 2

- 095 WI

- M SB 42NG

- 026

Revision 0 Page 4 of 4 11

- Nov

- 2011

Picture 3 13 Fill and charge the Damper acc. to AMM Section 32

- 10.
14 Install the Damper to the MLG acc. to AMM Section 32

- 10.
15 Perform steps 2 through 14 on the RH MLG damper.
16 Clean working area and check for foreign ob jects.

17 Do a landing gear extension and retraction test and check clearance between MLG

wheel and wheel bay i.a.w. AMM Section 32

- 10

. 18 Apply anti

- corrosion coating on damper connections i.a.w. AMM Section 12

- 30

. 19 Perform functional check of altered, r epaired and new parts.
20 Test all systems in working area for function.
21 Make necessary entries into aircraft logs

.