[PDF] SERVICE BULLETIN 17 jun 2009 Vertical fin

View - Download SERVICE BULLETIN

Previous PDF

Next PDF

SERVICE BULLETIN AS350

Approved under EASA DOA No. 21J.056.

55.00.14 Page 1/20

This document is available on the internet: www.eurocopter.com/techpub 2009.06.17

EUROCOPTER

DIRECTION TECHNIQUE SUPPORT

13725

MARIGNANE CEDEX FRANCE CIVIL VERSION(S): B3

SERVICE BULLETIN

No. 55.00.14

SUBJECT

: STABILIZERS

Vertical fin with small trailing edge angle

Corresponds to MODs 073148, 073158, 073169, 073170, 073205 and 073282

REVISION No. DATE OF APPROVAL DATE OF ISSUE

Revision 0 On: February 08, 2007 2007.06.06

Revision 1 On: March 18, 2009 2009.06.17

SERVICE BULLETIN AS350

Approved under EASA DOA No. 21J.056.

55.00.14 Page 2/20

2009.06.17

1. PLANNING INFORMATION

1.A. EFFECTIVITY

1.A.1. Helicopters/Equipment installed on aircraft

- Helicopters pre-MOD 073148. - Helicopters post-MOD 073148 and pre-MODs 073158, 073169, 073170, 073205 and 073282 with AFCS. - Helicopters post-MOD 073148 and pre-MODs 073158, 073169 and 073205 without AFCS. NOTE Refer to Individual Inspection Log Book (RIC AMS), equipment Log Cards (FM) or aircraft Log Book to identify the actual modification status of the aircraft.

1.A.2. Equipment not installed on aircraft

Vertical stabilizer Assy, upper P/N: 350A14-0020-1901, bearings P/N: 350A27-1191-20, control levers P/N:

350A27-2181-02 and yaw control rods P/N: FDT14167.

1.B. ASSOCIATED REQUIREMENTS

Not applicable.

1.C. REASON

To:

- improve vertical fin's aerodynamic efficiency in order to increase yaw control margins in autorotation at

airspeeds in excess of 100 Kts (MOD 073148),

- advise customers having equipped aircraft with vertical fins post-MOD 073148 that they must embody the

following modifications: . MOD 073158 in order to restore yaw control margins,

. MOD 073169 in order to suppress the risk of interference between bearing No. 5 of yaw control rod and a

bolt of the load compensator, . MOD 073205 in order to avoid end-of-travel abutment of tail servo-control during yaw control pitch adjustment. If aircraft is equipped with AFCS, the following modifications must also be embodied: . MOD 073170 in order to suppress the risk of interference between the rod located downstream of the series actuator and the airframe (aircraft equipped with AFCS only), . MOD 073282 in order to restore minimum clearance between the new fool-proofing device of the lever and the rod end, during flying control motion towards low pitch (in yaw).

The purpose of Revision 1 is to:

- integrate stop adjustment procedure and yaw control travel check for aircraft equipped with rudder pedal

anticipator (MOD 073252). - delete MOD 073206 in paragraph 1.A.1. - Revision 1 does not supersede compliance with Revision 0 of this Service Bulletin.

SERVICE BULLETIN AS350

Approved under EASA DOA No. 21J.056.

55.00.14 Page 3/20

2009.06.17

1.D. DESCRIPTION

Modification 073148 consists of installing, on vertical fin trailing edge, the new deflector which is shorter than

the original component and of decreasing width, allowing the rotor's aerodynamic loads to be reduced.

Therefore, EUROCOPTER recommends compliance with this modification and only delivers vertical fins post-MOD 073148 (P/N 350A14-0020-1902) as spares. The following modifications must jointly be embodied:

- MOD 073158 which consists of increasing the adjustment range to low pitch (by 1°). The negative pitch

value is now - 7°40 instead of - 6°40,

- MOD 073169 which consists of replacing bearing No. 5 (in the yaw control rod) with a PTFE bearing of

lower thickness,

- MOD 073205 which consists of offsetting the neutral position of the tail servo-control by loosening (3 turns)

the ball end which connects the servo-control to the airframe. This modification only applies to aircraft

equipped with SAMM servo-jacks whose useful travel is different from that of the DUNLOP servo-jacks, - MODs 073170 and 073282 which consist of installing a new steel AFCS yaw rod, of a smaller diameter

than that of the original rod, as well as a new control lever equipped with a U-shaped fool-proofing device.

The failure to embody the above-mentioned modifications could cause a moderate disturbance to the pilot

during specific flight phases. Therefore, EUROCOPTER recommends compliance with this Service Bulletin.

Revision 1 incorporates the stop adjustment procedure and yaw control travel check for aircraft equipped

with rudder pedal anticipator (MOD 073252).

1.E. COMPLIANCE

Eurocopter recommends compliance with this Service Bulletin.

1.E.1. Compliance at the works

1.E.1.a. On helicopter

Before delivery, comply with paragraph 2.B. of this Service Bulletin.

1.E.1.b. On equipment not installed on aircraft

Modify before delivery, stock of vertical fins as per paragraph 2.B.5.

1.E.2. Compliance in operation

1.E.2.a. On helicopters/equipment installed on aircraft

By operator, comply with paragraph 2.B. of this Service Bulletin before December 31, 2009, as per configuration.

SERVICE BULLETIN AS350

Approved under EASA DOA No. 21J.056.

55.00.14 Page 4/20

2009.06.17

1.E.2.b. On equipment not installed on aircraft

- By operator, before installation, modify vertical fins as per paragraph 2.B.5. - At the operator's initiative, scrap stock of bearings, rods and levers as per paragraph 2.B.5.

1.F. APPROVAL

Approval is limited to civil version helicopters subject to Airworthiness Certificate.

1.F.1. Approval of modifications

The information or instructions relate to:

- MOD 073148 which was approved on May 21, 2002, through Aircraft Modification Approval Form (FAM)

073148 issue 1 under the authority of DGAC Design Organization Approval No. F.JA.01,

- MOD 073158 which was approved on May 21, 2002, through Aircraft Modification Approval Form (FAM)

073158 issue 1 under the authority of DGAC Design Organization Approval No. F.JA01,

- MOD 073169 which was approved on May 21, 2002, through Aircraft Modification Approval Form (FAM)

073169 issue 1 under the authority of DGAC Design Organization Approval No. F.JA01,

- MOD 073170 which was approved on September 8, 2003, through Aircraft Modification Approval Form (FAM) 073170 issue 1 under the authority of DGAC Design Organization Approval No. F.JA01, - MOD 073205 which was approved on September 8, 2003, through Aircraft Modification Approval Form (FAM) 073205 issue 2 under the authority of DGAC Design Organization Approval No. F.JA01, - MOD 073282 which was approved on March 22, 2005, through Aircraft Modification Approval Form (FAM)

073282 issue 1 under the authority of DGAC Design Organization Approval No. 21.J056.

1.F.2. Approval of the Service Bulletin

The technical information contained in this Service Bulletin No. 55.00.14 Revision 0 was approved on February 8, 2007 under the authority of EASA Design Organization Approval No. 21J.056. The technical information contained in this Service Bulletin No. 55.00.14 Revision 1 was approved on March 18, 2009 under the authority of EASA Design Organization Approval No. 21J.056.

1.G. MANPOWER

Qualification

For compliance with this Service Bulletin, Eurocopter recommends personnel with the following qualifications:

Qualification: 1 Mechanical Technician.

Time Times are given for reference, for a standard configuration.

Time: 8 hours for Mechanical Technician.

SERVICE BULLETIN AS350

Approved under EASA DOA No. 21J.056.

55.00.14 Page 5/20

2009.06.17

1.H. WEIGHT AND BALANCE

On completion of the work mention weights and moments in the "Weight and Balance" sheet (Flight

Manual).

1.H.1. Weight

- Aircraft without AFCS: negligible. - Aircraft with AFCS: + 0.184 kg.

1.H.2. Longitudinal Moment

- Aircraft without AFCS: negligible. - Aircraft with AFCS: + 0.93 m.kg.

1.I. EFFECT ON ELECTRICAL LOADS

Helicopter's electrical load analysis not affected.

1.J. SOFTWARE MODIFICATION EMBODIMENT STATE

Not applicable.

1.K. REFERENCES

The following documents are required for compliance with this Service Bulletin: MET: 24.00.00.301: Electrical Power - General instructions, MET: 67.20.00.404: Tail rotor controls - Yaw control - Removal - Installation, MET: 67.20.00.501: Tail rotor controls - Rigging: without AUTO-PILOT, MET: 67.20.00.502: Tail rotor controls - Rigging: with AUTO-PILOT, MET: 67.30.00.403: Servo-controls - Tail rotor servo-control: Removal - Installation, MTC: 20.02.04.401: Riveting - Riveting - Pitch and edge distance, MTC: 20.02.05.404: Joining - Assembling by bolts and nuts, MTC: 20.04.04.403: Surface treatment before painting - Surface treatment with "Alodine 1200", MTC: 20.04.05.402: Paint and primer application procedure - Epoxy primer P05-P20 scheme,

MTC: 20.07.03.408: Technical instructions - General principles applicable for visual cleanliness appearance

Checks on an aircraft after an inspection or a repair,

MTC: 20.08.05.103: General rules applicable to aircraft - Monitoring of parts in operation, marking and

service life customization.

SERVICE BULLETIN AS350

Approved under EASA DOA No. 21J.056.

55.00.14 Page 6/20

2009.06.17

1.L. OTHER DOCUMENTS CONCERNED

This Service Bulletin will give rise to modification of the following documents by EUROCOPTER: IPC, MET.

These documents will be circulated at a later date.

1.M. TOOLING AFFECTED

Not applicable.

1.N. INTERCHANGEABILITY AND MIXABILITY BETWEEN THE PARTS

1.N.1. Interchangeability

Vertical fin post-MOD 073148 (P/N 350A14-0020-1902) is mechanically but not functionally interchangeable

with vertical fin pre-MOD 073148 (P/N 350A14-0020-1901).

1.N.2. Mixability

Mixing parts is prohibited.

SERVICE BULLETIN AS350

Approved under EASA DOA No. 21J.056.

55.00.14 Page 7/20

2009.06.17

2. ACCOMPLISHMENT INSTRUCTIONS

2.A. GENERAL

Before any intervention, refer to general safety instructions on electrical generation as per MET Work Card

24.00.00.301.

2.B. OPERATIONAL PROCEDURE

2.B.1. Preliminary steps

Implement suitable access means.

2.B.2. Procedure

2.B.2.a. Aircraft pre-MOD 073148

2.B.2.a.1. Installation of shortened deflector (MOD 073148)

As per Figure 1

- Remove and scrap deflector (a). - Offer up deflector (1) on vertical fin trailing edge and counterdrill to match existing holes. - Interlay sealant (15) between deflector (1) and vertical fin skin. - Install deflector (1) on vertical fin by means of rivets (2) as per MTC Work Card 20.02.04.401. - Blank attachment holes (B) of former deflector (a) by means of rivets (2). - Identify as per paragraph 2.C.2.

2.B.2.a.2. Replacement of yaw control rod bearing (MOD 073169)

As per Figure 2

- Remove bearing (b) from yaw control rod as per MET Work Card 67.20.00.404. - Retain bolts (c), scrap bearing (b), nuts (d) and washers (e). - Offer up bearing (3) on support (slot directed upward aircraft). - Install bearing (3) on support by means of bolts (c) nuts (4) and washers (5) as per MET Work Card

67.20.00.404.

- Tighten nuts (4) to torque as per MTC Work Card 20.02.05.404.

2.B.2.a.3. Replacement of yaw control lever and rod (MOD 073170 and 073282) (only on aircraft with AFCS)

As per Figure 3

- Disconnect rod (f) and flexible control (g) from control lever (h). - Scrap pins, nuts and washers (k). - Remove control lever (h) from coupler (i). - Scrap control lever (h) and retain hinge pin (m). - Install control lever (6) on coupler (i) by means of: . pin (m), . tabwasher (13) positioned underneath pin head (m),

. adjustment washer (14) between ring of lever (6) and side face of coupler (i). From set (14), select

suitable washer to maintain, in lever (6), axial play J comprised of 0.5 to 1 mm, . plain washer (10) and nut (11).

SERVICE BULLETIN AS350

Approved under EASA DOA No. 21J.056.

55.00.14 Page 8/20

2009.06.17

- Tighten nut (11) to 0.5 daN.m torque then safety by means of cotter pin (12). - Check for any rough running point in hinge of lever (6). - Connect on lever (6): . rod (f) by means of pin (9), washer (10) and nut (11), . flexible control (g) by means of pin (8), washer (10) and nut (11). - Tighten nuts (11) to a torque between 0.75 and 0.9 daN.m then safety by means of cotter pins (12).

As per Figure 4

- Disconnect rod (n) from bellcrank (r) and servo-control(s) distributor valve. - Scrap pins, nuts and washers (p). - Connect rod (7): . to bellcrank (r) by means of pin (8), washer (10) and nut (11), . to servo-control (s) by means of pin (9), washer (10) and nut (11). - Tighten nuts (11) to a torque between 0.75 and 0.9 daN.m then safety by means of cotter pins (12).

2.B.2.a.4. Increasing the low pitch adjustment range (MOD 073158)

Adjust yaw control stops as per paragraphs 4 and 5 of: - MET Work Card 67.20.00.502 if aircraft is equipped with AFCS or if MOD 073252 has been embodied, except paragraphs 5.2.1. and 5.2.2. Comply with instructions of appendix 4.A. of this Service Bulletin as replacement for paragraphs 5.2.1. and 5.2.2. - MET Work Card 67.20.00.501 if aircraft is not equipped with AFCS or if MOD 073252 has not been embodied.

NOTE 1

Refer to Individual Inspection Log Book (RIC AMS) to identify the actual modification status of the aircraft.

2.B.2.a.5. Offsetting the neutral position of the tail servo-control (MOD 073205)

NOTE 2

This operation is only required on aircraft equipped with

SAMM tail servo-jacks.

Adjust tail servo-control ball end as per paragraph 4.1 of MET Work Card 67.30.00.403 so that the dimension between ball end pin and servo-control rod end is 41 mm.

2.B.2.b. Aircraft equipped with vertical fin post-MOD 073148

If aircraft is not equipped with AFCS:

- replace bearing No. 5 (in yaw control rod) as per paragraph 2.B.2.a.2. (MOD 073169), - adjust yaw control as per paragraph 2.B.2.a.4. (MOD 073158).

SERVICE BULLETIN AS350

Approved under EASA DOA No. 21J.056.

55.00.14 Page 9/20

2009.06.17

If aircraft is equipped with AFCS:

- replace bearing No. 5 (in yaw control rod) as per paragraph 2.B.2.a.2. (MOD 073169), - replace yaw control lever and rod as per paragraph 2.B.2.a.3.(MODs 073170 and 073282), - adjust yaw control as per paragraph 2.B.2.a.4. (MOD 073169). If aircraft is equipped with SAMM tail servo-jack, adjust jack end as per paragraph 2.B.2.a.5. (MOD 073205)

2.B.3. Tests

Set aircraft into test condition.

Check clearance of flexible control and free travel of yaw control as per paragraph 7 of: - MET Work Card 67.20.00.502 if aircraft is equipped with AFCS or MOD 073252 has been embodied. - MET Work Card 67.20.00.501 if aircraft is not equipped with AFCS and MOD 073252 has not been embodied.

2.B.4. Final steps

- Carry out protection treatment on filed or pierced parts as par MTC Work Card 20.04.04.403. - Touch up paint as per MTC Work Card 20.04.05.402. - Disengage access means. - Restore aircraft to flight condition. - Carry out visual checks of aircraft as per MTC Work Card 20.07.03.408.

2.B.5. Operational procedure on equipment not installed on aircraft

Retrofitting of spare part stocks

Retrofit vertical fins in stock P/N 350A14-0020-1901 as per paragraph 2.B.2.a.1.

Stock scrapping

Scrap stock of:

- bearings P/N 350A27-1191-20 and replace with bearings P/N 350A27-1191-23, - rods P/N FDT14167 and replace with rods P/N B211100-001, - levers P/N 350A27-2181-02 and replace with levers P/N 350A27-2181-04.

2.C. IDENTIFICATION

2.C.1. Identification of modifications in the documents

In the aircraft documents, mention:

- compliance with this Service Bulletin No. 55.00.14 Revision 1,

- embodiment of modification 073148 and, depending on aircraft version, modifications 073158, 073169 and

073205 or 073158, 073169, 073170, 073205 and 073282.

SERVICE BULLETIN AS350

Approved under EASA DOA No. 21J.056.

55.00.14 Page 10/20

2009.06.17

2.C.2. Identification of modifications on material

Re-identify vertical fins as per table below.

Key Word Former P/N New P/N MOD Marking type

Vertical stabilizer

Assy, upper 350A14-0020-1901 350A14-0020-1902 073148 Ink as per MTC Work Card

20.08.05.103

2.D. OPERATING AND MAINTENANCE INSTRUCTIONS

2.D.1. Operating instructions

Not applicable.

2.D.2. Scheduled maintenance instructions

As per Master Servicing Recommendations (PRE).

2.D.3. Unscheduled maintenance instructions

Refer to Appendix 4.A. mentioned in this Service Bulletin until update of MET Work Cards 67.20.00.501 and

67.20.00.502.

SERVICE BULLETIN AS350

Approved under EASA DOA No. 21J.056.

55.00.14 Page 11/20

2009.06.17

Figure 1

SERVICE BULLETIN AS350

Approved under EASA DOA No. 21J.056.

55.00.14 Page 12/20

2009.06.17

Figure 2

SERVICE BULLETIN AS350

Approved under EASA DOA No. 21J.056.

55.00.14

Page 13/20

2009.06.17

Figure 3

SERVICE BULLETIN AS350

Approved under EASA DOA No. 21J.056.

55.00.14

Page 14/20

2009.06.17

PAGE LEFT BLANK INTENTIONALLY

SERVICE BULLETIN AS350

Approved under EASA DOA No. 21J.056.

55.00.14

Page 15/20

2009.06.17

Figure 4

SERVICE BULLETIN AS350

Approved under EASA DOA No. 21J.056.

55.00.14

Page 16/20

2009.06.17

PAGE LEFT BLANK INTENTIONALLY

SERVICE BULLETIN AS350

Approved under EASA DOA No. 21J.056.

55.00.14 Page 17/20

2009.06.17

3. MATERIAL INFORMATION

3.A. MATERIAL: COST - AVAILABILITY

3.A.1. Cost

For any information concerning kits and/or components, contact EUROCOPTER Network's Customer

Support Sales Department.

3.A.2. Availability

Kits or components will be delivered upon operator's order.

3.B. INFORMATION CONCERNING INDUSTRIAL SUPPORT

Not applicable.

3.C. MATERIAL REQUIRED FOR EACH HELICOPTER/ENGINE/COMPONENT

3.C.1. Kit or components to be ordered for one helicopter or for one assembly

3.C.1.a. Kit or components to be ordered for one helicopter pre-MOD 073148 and equipped with AFCS

Material

P/N Qty Item Key Word Former

P/N Instruction

350A08-5025-0071 Kit including:

350A14-2003-20 1 1 Angle, trailing edge 350A14-1136-20 Scrap

ASNA0078A402 16 2 Rivet

350A27-1191-23 1 3 Bearing 350A27-1191-20 Scrap

ASN52320BH050N 2 4 Nut

23116AG050LE 2 5 Washer

350A27-2181-04 1 6 Lever, control 350A27-2181-02 Scrap

B211100-001 1 7 Rod, yaw control FDT14167 Scrap

22731BC060018M 2 8 Pin, threaded

22731BC060020M 2 9 Pin, threaded

23111AG060LE 5 10 Washer

ASNA0045-060BCL 5 11 Castellated nut

23310CA015015 5 12 Pin, cotter

23350AC080LE 1 13 Washer, lock

350A27-1018-00 1 14 Set of adjustment

washers

SERVICE BULLETIN AS350

Approved under EASA DOA No. 21J.056.

55.00.14 Page 18/20

2009.06.17

3.C.1.b. Kit or components to be ordered for one helicopter pre-MOD 073148 and not equipped with AFCS

Material

P/N Qty Item Key Word Former

P/N Instruction

350A08-5025-0171 Kit including:

350A14-2003-20 1 1 Angle, trailing edge 350A14-1136-20 Scrap

ASNA0078A402 16 2 Rivet

350A27-1191-23 1 3 Bearing 350A27-1191-20 Scrap

ASN52320BH050N 2 4 Nut

23116AG050LE 2 5 Washer

3.C.1.c. Kit or components to be ordered for one helicopter post-MOD 073148 equipped with AFCS

Material

P/N Qty Item Key Word Former

P/N Instruction

350A08-5025-0271 Kit including:

350A27-1191-23 1 3 Bearing 350A27-1191-20 Scrap

ASN52320BH050N 2 4 Nut

23116AG050LE 2 5 Washer

350A27-2181-04 1 6 Lever, control 350A27-2181-02 Scrap

B211100-001 1 7 Rod, yaw control FDT14167 Scrap

22731BC060018M 2 8 Pin, threaded

22731BC060020M 2 9 Pin, threaded

23111AG060LE 5 10 Washer

ASNA0045-060BCL 5 11 Nut

23310CA015015 5 12 Pin, cotter

23350AC080LE 1 13 Washer, lock

350A27-1018-00 1 14 Set of adjustment

washers

3.C.1.d. Kit or components to be ordered for one helicopter post-MOD 073148 and not equipped with

AFCS

Material

P/N Qty Item Key Word Former

P/N Instruction

350A08-5025-0371 Kit including:

350A27-1191-23 1 3 Bearing 350A27-1191-20 Scrap

ASN52320BH050N 2 4 Nut

23116AG050LE 2 5 Washer

3.C.2. Material to be ordered separately

Not applicable.

SERVICE BULLETIN AS350

Approved under EASA DOA No. 21J.056.

55.00.14 Page 19/20

2009.06.17

3.C.3. Ingredients to be ordered separately

As per Work Cards mentioned in this Service Bulletin and list below. The ingredients below can be ordered separately, from INTERTURBINE:

Website: http://www.itlogistics.de

Telephone: +49.41.91.809.300

AOG: +49.41.91.809.444

Material P/N Qty Item Key Word

PR1771B2SEMK654 A/R 15 Sealant

3.C.4. Toolings

As per Work Cards mentioned in this Service Bulletin.

3.D. PROCUREMENT CONDITIONS

Order:

- kit P/N 350A08-5025-0071 for aircraft pre-MOD 073148 and equipped with AFCS, - kit P/N 350A08-5025-0171 for aircraft pre-MOD 073148 not equipped with AFCS, - kit P/N 350A08-5025-0271 for aircraft post-MOD 073148 and equipped with AFCS,quotesdbs_dbs43.pdfusesText_43

[PDF] double marge définition

[PDF] hierarchie verticale et horizontale

[PDF] géométrie dans l'espace terminale s methode

[PDF] relation intergénérationnelle définition

[PDF] organisation de la protection sociale en france

[PDF] retrosocialisation definition

[PDF] direction de la sécurité sociale organigramme

[PDF] relation interspécifique entre les animaux

[PDF] protection sociale en france schéma

[PDF] directeur de la sécurité sociale

[PDF] relation trophique def

[PDF] organisation lvmh

[PDF] relations intraspécifiques facteur biotique

[PDF] organigramme maison dior

[PDF] organigramme lvmh 2017