t: DAHER-SOCATA 

SOCATA 

Direction des Services 

65921 TARBES CEDEX 9 

FRANCE 

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TELEFAX: 33 (0)5 62.41.76.54 

RALLYE AIRCRAFT 

SERVICE BULLETIN I SB 150 32 

REVISION 3 ATA No . 

SUBJECT 

EFFECTIVITY 

PURPOSE 

MANDATORY 

The technical content of this document is approved 

under the authority of DOA No. EASA.21 J.013 

is the subject of an AD 

NOSE LANDING GEAR - WHEEL AXLE 

All MS880B, MS880B-D, MS881, MS883, MS884, MS885, MS886, MS887, MS890A, 

MS890B, MS892A150, MS892B150, MS892E150, MS892E-D150, MS893A, MS893B, 

MS893E, MS893E-D, MS894A, MS894E, Rallye 100S, Rallye 100S-D, Rallye 100ST, 

Rallye 1 OOST-D, Rallye 11 OST, 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 235E-D airplanes. 

Reduce possibility of a nose gear wheel axle fatigue failure. 

I 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. 

APPLICATION: 

- Replacement of nose landing gear or wheel axle with a second-hand part : apply 

operation 7) of Paragraph DESCRIPTION OF ACCOMPLISHMENT INSTRUCTIONS 

and replace the 4 attaching screws (2) before the first flight. 

- Within the next 50 hours after this SB issue, then every 200 hours apply the 

instructions described in Paragraph DESCRIPTION OF ACCOMPLISHMENT 

INSTRUCTIONS. 

- Every 2000 hours apply the instructions described in Paragraph DESCRIPTION OF 

ACCOMPLISHMENT INSTRUCTIONS and replace the 4 attaching screws (2). 

DESCRIPTION OF ACCOMPLISHMENT INSTRUCTIONS : 

JUN 91 

Rev. 3- SEP 15 

NOTE: 

Operations required in this Service Bulletin must be accomplished by persons authorized by 

their Airworthiness Authorities and according to the procedure described hereafter. 

1) Install the airplane on jacks. 

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

3) Remove the nose gear wheel. 

4) Remove the nose gear wheel axle (3), retain the 4 attaching screws (2), the 4 washers 

(4) and (if installed) the thickness washer (1) ; discard the locknuts (5). 

5) Clean the wheel and the axle. 

6) Perform a detailed visual inspection of the intersection between the axle radius and 

nose landing gear fork [area 1 (7)] to look for evidence of chafing between the wheel 

bearing race and axle surface. If necessary, replace nose gear wheel axle (3). 

Page 1 I 3 
RALLYE AIRCRAFT I I SERVICE BULLETIN SB 150 

REVISION3 

MANDATORY 

The technical content of this document is approved 

under the authority of DOA No. EASA.21J.013 

is the subject of an AD 

7) Detect cracks on nose wheel axle by dye penetrant inspection, check for absence 

of distortion and nicks or wear ; change the axle if necessary. 

8) Check the 4 attaching screws for condition, check for absence of distortion, 

scratches and nicks or wear ; change the screws if necessary. 

NOTE: 

Every 2000 hours, replace the 4 attaching screws (2) PIN ZOO.N5101231508 with 

new ones. 

9) Coat lightly the axle contacts and the wheel bearings with AIR 421 OB (MIL.G.23827 A) 

grease. 

CAUTION 

THE NEW WHEEL AXLE PI N 895.42.0.027.0 SUPPUED AS SPARES WILL BE 

MANDATORILY INSTALLED WITH THE THICKNESS WASHER (1) 

1 0) Attach the nose gear wheel axle (3) on the landing gear (6) with 4 attaching 

screws (2) PI N ZOO.N5101231508, 4 washers (4), PIN ZOO.N5701039365 and (if 

installed), the thickness washer (1) and 4 new locknuts (5) PIN ZOO.N5401458376. 

11) Install the nose gear wheel. 

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

13) Check nose gear wheel for free rotation. 

14) Set the airplane on its wheels again. 

NOTE: 

Refer to the Spares Catalog corresponding to your airplane for PIN of the parts to be 

replaced. 

UPDATING OF THE AIRCRAFT DOCUMENTATION : 

WARNING 

JUN 91 

Rev. 3- SEP 15 

Upon completion of Service Bulletin No. SB 150-32, Revision 3 "NOSE LANDING GEAR -

WHEEL AXLE", make an appropriate maintenance record entry. 

SOCATA considers that it is MANDATORY for operators to comply with the instructions of 

this SB. 

Operators who arbitrarily ignore the compliance statement indicated in this SB do so at their 

own risk. 

Page 2 I 3 
I 

I RALLYE AIRCRAFT I SERVICE BULLETIN SB 150 32 

REVISION 3 ATA No. 

MANDATORY 

5 

JUN 91 

Rev. 3- SEP 15 

The technical content of this document is approved 

under the authority of DOA No. EASA.21J.013 

0 

I 

I I 

I I 

I I 

I I 

I I 

I I 

I I 

I 

2 

Figure 1 - Wheel axle 

is the subject of an AD 

1 - Thickness washer 

2- Attaching screw 

3- Nose gear wheel axle 

4- Washer 

5- Locknut 

6- Landing gear 

7- Area 1 

Page 3 I 3