Daher MSB 150-32: Revision 4, text

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Page 1Open in PDF

Page 1 / 8JUN 91 Rev. 4 - JAN 23 This document is the property of Daher Aerospace. Reproduction prohibited without prior Daher Aerospace agreement.

REVISION 1 SUBJECT: NOSE LANDING GEAR - WHEEL AXLE

CAUTION

PUBLICATION OF THIS SERVICE BULLETIN CANCELS AND REPLACES PREVIOUS REVISIONS.

REPLACE THE EXISTING COPY OF THE SERVICE BULLETIN WITH THIS SERVICE BULLETIN VERSION. THE SUPERSEDED COPY SHOULD BE DESTROYED.

NOTE:

A black bar in the left margin indicates a change in that line of text or ﬁgure .

REFERENCE DOCUMENT:

Modification No. MOD80-0160-32 Version A EFFECTIVITY: All MS880B, MS880BD, MS881, MS883, MS884, MS885, MS886, MS887, MS890A, MS890B, MS892A150, MS892B150, MS892E150, MS892ED150, MS893A, MS893B, MS893E, MS893ED, MS894A, MS894E, Rallye 100S, Rallye 100SD, Rallye 100ST , Rallye 100STD, Rallye 110ST , Rallye 150ST , Rallye 150ST D, Rallye 150T , Rallye 150T D, Rallye 150SV, Rallye 150SVS, Rallye 180T , Rallye 180TS, Rallye 180T D, Rallye 235A, Rallye 235F , Rallye 235E, Rallye 235ED aircraft.

NOTE:

If an aircraft covered in the effectivity has a modification or repair that is not of Daher Aerospace origin, and which affects the content of this Service Bulletin, the operator is responsible for obtaining approval by the appropriate airworthiness authority for an adaptation before the incorporation of the Service Bulletin.

PURPOSE: Reduce the possibility of fatigue failure in the nose gear wheel axle.

PURPOSE OF REVISION 3:

- To reduce inspection interval from 500 hours to 200 hours.

- To add an inspection between axle radius and nose landing gear fork.

- To add Item 7 on the Figure 1.

- To take into account second-hand nose landing gears and second-hand wheel axles.

SERVICE BULLETIN

RALLYE AIRCRAFT

MANDATORY The technical content of this document is approved under the authority of the DOA ref EASA.21J.013 and is the subject to an AD SB 150 REVISION 4 32 ATA No.

Daher Aerospace Customer Support Airplane Division Phone: 33 (0)5 62.41.73.00 65921 Tarbes Cedex 9 tbmcare@daher .com France

Page 2Open in PDF

SERVICE BULLETIN

RALLYE AIRCRAFT

MANDATORY The technical content of this document is approved under the authority of the DOA ref EASA.21J.013 and is the subject to an AD SB 150 REVISION 4 32 ATA No.

Page 2 / 8JUN 91 Rev. 4 - JAN 23 This document is the property of Daher Aerospace. Reproduction prohibited without prior Daher Aerospace agreement.

PURPOSE OF REVISION 4:

- To propose nose gear wheel axle new design as a terminative solution.

- To add a flowchart in order to clarify the process to be applied.

- Dye penetrant inspection becomes a magnetic particle inspection.

NOTE:

The Service Bulletin incorporates a new form of presentation and new wording.

SUMMARY:

A. PREPARATION B. INSPECTION C. NOSE GEAR WHEEL AXLE REPLACEMENT D. RECONDITIONING APPLICATION:

Refer to the following flowchart:

NOTE:

In case of replacement of nose landing gear or nose gear wheel axle (8) with a second-hand part: apply Paragraph B.: “INSPECTION” and replace the 4 attaching screws (6) before the first flight.

NOTE:

To replace the 4 attaching screws (6), every 2,000 hours.

Page 3Open in PDF

SERVICE BULLETIN

RALLYE AIRCRAFT

MANDATORY The technical content of this document is approved under the authority of the DOA ref EASA.21J.013 and is the subject to an AD SB 150 REVISION 4 32 ATA No.

Page 3 / 8JUN 91 Rev. 4 - JAN 23 This document is the property of Daher Aerospace. Reproduction prohibited without prior Daher Aerospace agreement.

Stop the AD/SB application ?

Replace nose gear wheel axle by new design axle + replace the 4 attaching screws (Paragraph C.)

Perform a visual inspection on defined zone (Paragraph B.)

YES NO

Next 50h and every 200h Crack detected ?

Perform a magnetic particle inspection on defined zone (Paragraph B.)

Crack detected ?

End of the AD/SB application NO NO YES YES

Page 4Open in PDF

SERVICE BULLETIN

RALLYE AIRCRAFT

MANDATORY The technical content of this document is approved under the authority of the DOA ref EASA.21J.013 and is the subject to an AD SB 150 REVISION 4 32 ATA No.

Page 4 / 8JUN 91 Rev. 4 - JAN 23 This document is the property of Daher Aerospace. Reproduction prohibited without prior Daher Aerospace agreement.

WARRANTY:

Not applicable OPERATIONAL CONSEQUENCES / TRAINING:

Not applicable SERVICING CONSEQUENCES:

No changes to the scheduled maintenance PROCURABLE MATERIAL:

If nose gear wheel axle is replaced:

Item Figure Part Number Description Qty/aircraft / / AV-RAL-032 Front wheel axle assembly 1 1 1 5401458376 Locknut(P/N ISO10511-M8-05-B9G) 4 6 1 5101231508 Screw (P/N 5030308375) 4 NOTE:

P/N AV-RAL-032 is composed of the nose gear wheel axle (P/N AV-RAL-001-01) (Item 4) and the spacer (P/N AV-RAL-002-01) (Item 5).

CONSUMABLE MATERIAL or OTHER PRODUCTS (Local purchase):

- Grease AIR 4210A (MIL-G-23827A) TOOLS:

- Standard aeronautical maintenance station tools

- Magnetic particle inspection tools AFFECTED PUBLICATIONS:

IPC Chapters:

- 4.3.0

- 4.3.1

- 4.3.2 AMM Chapter:

- 2.5.1 CMM: Not applicable POH: Not impacted RELATED DOCUMENTS: Document(s) necessary for application of the procedure(s) None

Page 5Open in PDF

SERVICE BULLETIN

RALLYE AIRCRAFT

MANDATORY The technical content of this document is approved under the authority of the DOA ref EASA.21J.013 and is the subject to an AD SB 150 REVISION 4 32 ATA No.

Page 5 / 8JUN 91 Rev. 4 - JAN 23 This document is the property of Daher Aerospace. Reproduction prohibited without prior Daher Aerospace agreement.

ASSOCIATED DOCUMENTS:

None MANPOWER:

If no replacement of nose gear wheel axle:

Application During a scheduled inspection 1 aeronautical mechanic: 1 hour 1 magnetic particle inspection-certified operator for crack detection: 1 hour Out of a scheduled inspection 1 aeronautical mechanic: 2 hours 1 magnetic particle inspection-certified operator for crack detection: 1 hour For a new nose gear wheel axle installation:

Application During a scheduled inspection 1 aeronautical mechanic: 1 hour Out of a scheduled inspection 1 aeronautical mechanic: 2 hours NOTE:

The manpower estimates given in this Service Bulletin assume that the work will be done by Service Centers having previous experience with the aircraft type and with the procedures involved.

TECHNICAL INCIDENCES:

- None PARTS TO BE RE-IDENTIFIED:

YES /C0111 NO /C0084 DESCRIPTION OF ACCOMPLISHMENT INSTRUCTIONS :

WARNING

MAKE SURE TO OBEY ALL THE WARNINGS AND CAUTIONS INCLUDED IN THE REFERENCED PROCEDURES.

NOTE:

Operations required in this Service Bulletin must be performed by persons authorized by the appropriate airworthiness authority.

A. PREPARATION – See Figure 1

1) Install the airplane on jacks - refer to Chapter 2.5.1 of the Maintenance Manual.

2) Remove the nose gear wheel fairing (if installed).

3) Remove the nose gear wheel.

4) Remove the nose gear wheel axle (8), retain the 4 attaching screws (6), the 4 washers (2) and the spacer (7) (if installed); discard the locknuts (1).

Page 6Open in PDF

SERVICE BULLETIN

RALLYE AIRCRAFT

MANDATORY The technical content of this document is approved under the authority of the DOA ref EASA.21J.013 and is the subject to an AD SB 150 REVISION 4 32 ATA No.

Page 6 / 8JUN 91 Rev. 4 - JAN 23 This document is the property of Daher Aerospace. Reproduction prohibited without prior Daher Aerospace agreement.

If you want to continue the adherence to the AD/SB application:

5) Apply Paragraph B.: “INSPECTION”.

If you want to eliminate the need to adhere to the AD and to apply the repetitive Service Bulletin by the replacement of the nose gear wheel axle:

5) Apply Paragraph C.: “NOSE GEAR WHEEL AXLE REPLACEMENT”.

B. INSPECTION – See Figure 1

1) Clean the wheel and the axle.

2) Perform a detailed visual inspection of the area 1 (9) to look for evidence of chafing between the wheel bearing and axle surface.

If a crack is detected during the detailed visual inspection:

3) Apply Paragraph C.: “NOSE GEAR WHEEL AXLE REPLACEMENT”.

If no crack is detected during the detailed visual inspection:

3) Perform a magnetic particle inspection on nose wheel axle. Check for absence of distortion and nicks or wear.

If a crack is detected:

4) Apply Paragraph C.: “NOSE GEAR WHEEL AXLE REPLACEMENT”.

If no crack is detected:

4) Check the 4 attaching screws (6) for condition, check for absence of distortion, scratches and nick or wear. Change screws if necessary .

NOTE:

The 4 attaching screws (6) must be replaced by new ones every 2,000 hours.

CAUTION

THE NOSE GEAR WHEEL AXLE (8) P/N 895.42.0.027.0 MUST BE INSTALLED WITH THE SPACER (7).

5) Attach the nose gear wheel axle (8) on the landing gear (3) with the 4 attaching screws (6), 4 washers (2), and (if installed), the spacer (7) and the 4 new locknuts (1).

6) Lightly coat the axle contacts and the wheel bearings with AIR 4210B (MIL-G-23827A) grease.

7) Perform the reconditioning in accordance with Paragraph D.

C. NOSE GEAR WHEEL AXLE REPLACEMENT – See Figure 1

1) Discard the removed nose gear wheel axle (8), the spacer (7) and the 4 attaching screws (6).

CAUTION

THE NEW NOSE GEAR WHEEL AXLE (4) MUST BE INSTALLED WITH THE SPACER

(5).

2) Attach the new nose gear wheel axle (4) on the landing gear (3) with the 4 new attaching screws (6), 4 washers (2), the spacer (5) and the 4 new locknuts (1).

Page 7Open in PDF

SERVICE BULLETIN

RALLYE AIRCRAFT

MANDATORY The technical content of this document is approved under the authority of the DOA ref EASA.21J.013 and is the subject to an AD SB 150 REVISION 4 32 ATA No.

Page 7 / 8JUN 91 Rev. 4 - JAN 23 This document is the property of Daher Aerospace. Reproduction prohibited without prior Daher Aerospace agreement.

NOTE:

The 4 attaching screws (6) must be replaced by new ones every 2,000 hours.

3) Lightly coat the axle contacts and the wheel bearings with AIR 4210B (MIL-G-23827A) grease.

4) Perform the reconditioning in accordance with Paragraph D.

D. RECONDITIONING – See Figure 1

1) Install the nose gear wheel.

2) Install the nose gear wheel fairing (if necessary).

3) Check nose gear wheel for free rotation.

4) Set the airplane on its wheels again.

DOCUMENTATION:

Upon completion of this Service Bulletin, make an appropriate maintenance record entry as described hereunder:

If the nose gear wheel axle has not been replaced:

- SB150-32 Rev 4 “NOSE LANDING GEAR - WHEEL AXLE” If the nose gear wheel axle has been replaced by the new design one (P/N AV-RAL-001-01):

- SB150-32 Rev 4 “NOSE LANDING GEAR - WHEEL AXLE” and Modification No. MOD80-0160-32 Version A WARNING: Daher Aerospace considers that it is MANDATORY for operators to comply with the instructions of this Service Bulletin.

Owners/operators who do not follow the compliance indicated in this Service Bulletin do so at their own risk.

Page 8Open in PDF

SERVICE BULLETIN

RALLYE AIRCRAFT

MANDATORY The technical content of this document is approved under the authority of the DOA ref EASA.21J.013 and is the subject to an AD SB 150 REVISION 4 32 ATA No.

Page 8 / 8JUN 91 Rev. 4 - JAN 23 This document is the property of Daher Aerospace. Reproduction prohibited without prior Daher Aerospace agreement.

Figure 1 - Wheel axle 1 - Locknut 2 - Washer 3 - Landing gear 4 - New nose gear wheel axle 5 - Spacer 6 - Attaching screw 7 - Spacer 8 - Nose gear wheel axle 9 - Area 1