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EMERGENCY 

ALERT SERVICE BULLETIN 

SUBJECT: ROTOR FLIGHT CONTROLS - Single hydraulic main and tail servo-controls 

Replacement of the "SAMM", "TRW", "GOODRICH" and "UTAS" main single 

hydraulic and tail servo-controls equipped with non-compliant input lever 

articulation bearings. 

AIRCRAFT 

CONCERNED NUMBER Version(s) 

Civil Military

350 67.00.60 B, BA, BB, B1, B2, B3, D L1 

550 67.00.36 A2, C2, C3, U2 

355 67.00.41 E, F, F1, F2, N, NP

555 67.00.27 AF, AN, SN, UF, UN 

Revision No. Date of issue 

Revision 0 2013-04-15 

Summary: 

Compliance with this ALERT SERVICE BULLETIN consists in identifying and replacing the servo-control(s) whose 

input lever bearing is non-compliant. 

Compliance: 

EUROCOPTER renders compliance with this ALERT SERVICE BULLETIN mandatory. 

For the attention of 
 

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1. PLANNING INFORMATION 

1.A. EFFECTIVITY 

1.A.1. Helicopters/installed equipment 

- Helicopters equipped with single hydraulic main and/or tail servo-controls, manufactured by "SAMM", 

"TRW", "GOODRICH" or "UTAS". 

NOTE 1 

Refer to the Log Cards (FM) to identify the actual 

configuration of the helicopter. 

1.A.2. Non-installed equipment 

- Single hydraulic main and tail servo-controls, manufactured by "SAMM", "TRW", "GOODRICH" or "UTAS". 

1.B. ASSOCIATED REQUIREMENTS 

Not applicable. 

1.C. REASON 

During acceptance tests of a servo-control, the supplier noticed that the servo-control input lever bearing had 

a play value exceeding the specified value. 

The increase in this play leads to excessive misalignment between the lever and distributor slide, potentially 

leading to the buttressing of the distributor slide in its sleeve. 

This buttressing would create a "friction point" on the flight controls, which could be revealed during a 

pre-flight hydraulic test. 

In order to eliminate the risk of this "friction point" appearing on the flight controls, EUROCOPTER renders 

the replacement and return to the manufacturer of all servo-controls with non-compliant input lever bearing 

mandatory. 
 

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1.D. DESCRIPTION 

Compliance with this ALERT SERVICE BULLETIN consists in: 

- identifying the servo-controls equipped with a non-compliant input lever bearing: 

. Bearing identified by a marking (a), visible on the sides of its external race (b), 

or, 

. bearing with no visible marking on the two sides of its external race (b) or on the sealing flanges (d). 

- Replacing the single hydraulic main and tail servo-controls equipped with a non-compliant input lever 

bearing. 

1.E. COMPLIANCE 

EUROCOPTER renders compliance with this ALERT SERVICE BULLETIN mandatory. 

a 

b 

d 
 

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1.E.1. Compliance at the works 

1.E.1.a. Helicopters/installed equipment: 

Before delivery: 

- Consult the Log Cards (FM) and note: 

. The Serial Number (S/N) of the main single hydraulic and tail servo-controls. 

. The servo-control repair date, if they were repaired at the “UTC AEROSPACE SYSTEMS” premises in the 

“MONROE, N/C, USA” repair station. 

- If the S/N does not correspond to the S/N listed in paragraph 4.A. and the servo-control has not been 

repaired in the period from September 27, 2012 to January 30, 2013 by the aforementioned repair station, 

the servo-control is equipped with a compliant input lever bearing. 

. Comply with paragraph 3.C. 

. Resume flights. 

- In all other cases, check that there is a “B” marked in the area defined in paragraph 4.B. 

. If there is a "B" marked, the servo-control is equipped with a compliant input lever bearing. 

- Comply with paragraph 3.C. 

- Resume flights. 

. If there is no "B" marked.

- Comply with paragraphs 3.A., 3.B.1., 3.B.2.a. and 3.C. 

for each servo-control concerned. 

NOTE 2 

A table is available in paragraph 4.C. in order to aid 

compliance with the instructions given above. 

Interpretation of the results: 

- If the servo-control is equipped with a non-compliant bearing: 

. Comply with paragraph 3.B.2.b. 

- If the servo-control is equipped with a compliant bearing: 

. If necessary, remove the servo-control as per AMM Task 67-32-00, 4-1 or 67-33-00, 4-1 or MET 

Work Card 67.30.00.402 or 67.30.00.403.

. Identify the servo-control with the letter "B" marked in the area defined in paragraph 4.B., (e.g.: using 

a permanent marker, as per MTC Work Card 20.08.05.103). 

. If previously removed, install the servo-control as per AMM Task 67-32-00, 4-1 or 67-33-00, 4-1 or 

MET Work Card 67.30.00.402 or 67.30.00.403.

. Comply with paragraph 3.B.3.

. Resume flights. 
 

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1.E.1.b. Non-installed equipment: 

Before delivery or installation on the helicopter: 

- Consult the Log Cards (FM) and note: 

. The Serial Number (S/N) of the main single hydraulic and tail servo-controls. 

. The servo-control repair date, if they were repaired at the “UTC AEROSPACE SYSTEMS” premises in the 

“MONROE, N/C, USA” repair station. 

- If the S/N does not correspond to the S/N listed in paragraph 4.A. and the servo-control has not been 

repaired in the period from September 27, 2012 to January 30, 2013 by the aforementioned repair station, 

the servo-control is equipped with a compliant input lever bearing. 

. Leave as is.

- In all other cases, check that there is a “B” marked in the area defined in paragraph 4.B. 

. If there is a "B" marked, the servo-control is equipped with a compliant input lever bearing. 

- Leave as is.

. If there is no "B" marked.

- Comply with paragraphs 3.B.4.a. and 3.C. for each servo-control concerned. 

NOTE 3 

A table is available in paragraph 4.C. in order to aid 

compliance with the instructions given above. 

Interpretation of the results: 

- If the servo-control is equipped with a non-compliant bearing: 

. Comply with paragraph 3.B.4.b. 

- If the servo-control is equipped with a compliant bearing: 

. Identify the servo-control with the letter "B" marked in the area defined in paragraph 4.B., (e.g.: using 

a permanent marker, as per MTC Work Card 20.08.05.103). 
 

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1.E.2. Compliance in service 

The work on the helicopter is to be performed by the operator. 

1.E.2.a. Helicopters/installed equipment: 

Within 10 flying hours or 7 days following receipt of this ALERT SERVICE BULLETIN, issued on the date 

indicated at the foot of the page: 

- Consult the Log Cards (FM) and note: 

. The Serial Number (S/N) of the main single hydraulic and tail servo-controls. 

. The servo-control repair date, if they were repaired at the “UTC AEROSPACE SYSTEMS” premises in the 

“MONROE, N/C, USA” repair station. 

- If the S/N does not correspond to the S/N listed in paragraph 4.A. and the servo-control has not been 

repaired in the period from September 27, 2012 to January 30, 2013 by the aforementioned repair station, 

the servo-control is equipped with a compliant input lever bearing. 

. Comply with paragraph 3.C. 

. Resume flights. 

- In all other cases, check that there is a “B” marked in the area defined in paragraph 4.B. 

. If there is a "B" marked, the servo-control is equipped with a compliant input lever bearing. 

- Comply with paragraph 3.C. 

- Resume flights. 

. If there is no "B" marked.

- Before resuming flights, comply with paragraphs 3.A., 3.B.1., 3.B.2.a. and 3.C. for each servo-control 

concerned. 

NOTE 4 

A table is available in paragraph 4.C. in order to aid 

compliance with the instructions given above. 
 

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Interpretation of the results: 

. If the servo-control is equipped with a non-compliant bearing: 

- Before resuming flights, and until the servo-control is replaced: 

. Pay particular attention to the free travel of the flight controls during each pre-flight hydraulic test 

(Flight Manual, Section 4). 

- If there is a "friction point" on the flight controls, comply with paragraph 3.B.2.b. before the next 

flight. 

- If there is no "friction point" on the flight controls, comply with paragraph 3.B.2.b. no later than 

within 50 flying hours without exceeding 4 months following receipt of this ALERT SERVICE 

BULLETIN, issued on the date indicated at the bottom of the page. 

NOTE 5 

Contact EUROCOPTER as per paragraph 2.A. in order to 

implement the logistics required to replace the servo-control. 

. If the servo-control is equipped with a compliant bearing: 

- During the next removal operation for this servo-control at the latest, identify it by marking the letter 

"B" in the area defined in paragraph 4.B. (e.g.: using a permanent marker as per MTC Work 

Card 20.08.05.103). 

- If previously removed, install the servo-control as per AMM Task 67-32-00, 4-1 or 67-33-00, 4-1 or 

MET Work Card 67.30.00.402 or 67.30.00.403. 

- Comply with paragraph 3.B.3. 

- Resume flights. 

1.E.2.b. Non-installed equipment: 

Before installing the servo-control on a helicopter, or no later than within 6 months following receipt of this 

ALERT SERVICE BULLETIN, issued on the date indicated at the foot of the page, 

- Consult the Log Cards (FM) and note: 

. The Serial Number (S/N) of the main single hydraulic and tail servo-controls. 

. The servo-control repair date, if they were repaired at the “UTC AEROSPACE SYSTEMS” premises in the 

“MONROE, N/C, USA” repair station. 

- If the S/N does not correspond to the S/N listed in paragraph 4.A. and the servo-control has not been 

repaired in the period from September 27, 2012 to January 30, 2013 by the aforementioned repair station, 

the servo-control is equipped with a compliant input lever bearing. 

. Leave as is. 

- In all other cases, check that there is a “B” marked in the area defined in paragraph 4.B. 

. If there is a "B" marked, the servo-control is equipped with a compliant input lever bearing. 

- Leave as is. 

. If there is no "B" marked.

- Comply with paragraphs 3.B.4.a. and 3.C. for each servo-control concerned.
 

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NOTE 6 

A table is available in paragraph 4.C. in order to aid 

compliance with the instructions given above. 

Interpretation of the results: 

- If the servo-control is equipped with a non-compliant bearing: 

. Comply with paragraph 3.B.4.b. 

NOTE 7 

Contact EUROCOPTER as per paragraph 2.A. in order to 

implement the logistics required to replace the servo-control. 

- If the servo-control is equipped with a compliant bearing: 

. Identify the servo-control with the letter "B" marked in the area defined in paragraph 4.B. (e.g.: using a 

permanent marker, as per MTC Work Card 20.08.05.103). 

1.F. APPROVAL 

Approval of modifications: 

Not applicable. 

 Approval of this document: 

The technical information contained in this ALERT SERVICE BULLETIN Revision 0 was approved 

on April 15, 2013 under the authority of EASA Design Organization Approval No. 21J.056 for helicopters of 

civil versions subject to an Airworthiness Certificate. 

The technical information contained in this ALERT SERVICE BULLETIN Revision 0 was approved 

on April 15, 2013 under the prerogatives of the recognition of design capability FRA21J-002-DGA for French 

Government helicopters. 

The technical information contained in this ALERT SERVICE BULLETIN Revision 0 was approved 

on April 15, 2013 by the EUROCOPTER Airworthiness Department for export military versions. 

1.G. MANPOWER 

For compliance with this ALERT SERVICE BULLETIN, EUROCOPTER recommends the following personnel 

qualifications: 

Qualification: - 1 Mechanical Engineering Technician. 

The time for the operations is given for information purposes, for a standard configuration. 

Time for the operations: - 1 hour for the Mechanical Engineering Technician (Removal/Installation of the 

servo-control). 
 

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1.H. WEIGHT AND BALANCE 

Not applicable. 

1.I. EFFECT ON ELECTRICAL LOADS 

Not applicable. 

1.J. SOFTWARE MODIFICATION EMBODIMENT RECORD 

Not applicable. 

1.K. REFERENCES 

The documents required for compliance with this ALERT SERVICE BULLETIN are as follows: 

Helicopters, all versions: 

- MTC: 20.08.05.101: Drafting and updating the Log Card (F.M.) 

- MTC: 20.08.05.103: Monitoring of parts in operation - Marking - Service life customization 

For AS350 versions B2, B3 and AS550 version C3: 

- AMM: 29-00-00, 3-1: Hydraulic Power - General safety instructions - Hydraulic Power System 

- AMM: 53-51-00, 4-1: Cowlings - Removal / Installation - Upper cowlings 

- AMM: 60-00-00, 3-1: General - Mechanics systems - General safety instructions - Mechanical assemblies 

- AMM: 67-00-00, 3-1: Rotor flight controls - General safety instructions - Flight controls 

- AMM: 67-32-00, 4-1: Servo-controls (single Hydraulic System) - Removal/Installation - Main Servo-controls 

- AMM: 67-33-00, 4-1: Rear servo-control - Removal/Installation - Tail rotor servo-control 

For AS350 versions B, BA, BB, B1, D, L1, AS550 versions A2, C2, U2 and AS355 versions E, F, F1, F2, N, 

NP: 

- MET: 29.00.00.301: Hydraulic power system - General instructions 

- MET: 53.00.00.403: Fuselage - Engine and MGB cowlings: Removal-Installation 

- MET: 67.10.00.301: Main rotor controls - General instructions 

- MET: 67.30.00.402: Servo-controls - Main rotor servo-controls: Removal-Installation 

- MET: 67.30.00.403: Servo-controls - Tail servo-controls: Removal-Installation 

For AS555 versions AN, SN and UN: 

- MET: 29.00.00.301: Hydraulic power system - General instructions 

- MET: 53.00.00.403: Fuselage - Engine and MGB cowlings: Removal-Installation 

- MET: 67.10.00.301: Main rotor controls - General instructions 

- MET: 67.30.15.403: Servo-controls - Tail servo-controls: Removal-Installation 

For AS555 versions AF, UF: 

- MET: 29.00.00.301: Hydraulic power system - General instructions 

- MET: 53.00.00.403: Fuselage - Engine and MGB cowlings: Removal-Installation 

- MET: 67.10.00.301: Main rotor controls - General instructions 

- MET: 67.30.15.403: Servo-controls - Tail servo-controls: Removal-Installation 
 

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1.L. DOCUMENTS AFFECTED 

Not applicable. 

1.M. INTERCHANGEABILITY OR MIXABILITY OF PARTS 

Not applicable. 
 

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2. MATERIAL INFORMATION 

2.A. MATERIAL: PRICE - AVAILABILITY - PROCUREMENT 

A compliant servo-control will be made available free of charge (cost of parts and shipping) by 

EUROCOPTER within the time limit according to the instructions given in this ALERT SERVICE BULLETIN. 

Contact EUROCOPTER: 

EUROCOPTER 

Etablissement de Marignane 

Direction Ventes et Relations Client (ECR) 

13725 MARIGNANE CEDEX 

2.B. INFORMATION CONCERNING INDUSTRIAL SUPPORT 

Not applicable. 

2.C. MATERIAL REQUIRED FOR EACH HELICOPTER/COMPONENT 

 Kits or components to be ordered for one helicopter or one assembly: 

Not applicable. 

Products to be ordered separately: 

 As per Work Cards and Tasks mentioned in this ALERT SERVICE BULLETIN. 

The products can be ordered separately, from the INTERTURBINE AVIATION LOGISTICS company. 

Website: http://www.interturbine.com

 Telephone: +49.41.91.809.300 

AOG: +49.41.91.809.444 

 Special tools: 

Key Word Qty Tool P/N or equivalent Item

Borescope 1 Off the shelf (zz) 

Mirror 1 Off the shelf (yy) 
 

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2.D. MATERIAL TO BE RETURNED 

Contact Goodrich Actuation Systems in order to define the conditions for returning the servo-controls 

equipped with a non-compliant bearing. 

Key Word Qty New P/N Item Former 

 P/N → Instruction 

Servo-control 1 to 4 See paragraph 4 

(Appendix) - / Conformity carried out 

by Goodrich Actuation 

Systems. 

Contact Goodrich Actuation Systems with the following contact information: 

Goodrich Actuation Systems 

Département MRO hélicoptère-Airbus 

43 rue des Prés 27950 Saint Marcel – France 

Telephone: +33 2.32.64.70.23 

Fax: +33 2.32.64.70.01 

E-mail: Fanny.Noel@utas.utc.com 
 

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3. ACCOMPLISHMENT INSTRUCTIONS 

3.A. GENERAL 

Read and comply with the general hydraulic instructions as per AMM Task 29-00-00, 3-1 or MET Work 

Card 29.00.00.301.

Read and comply with the general flight control instructions as per AMM Task 67-00-00, 3-1 or MET Work 

Card 67.10.00.301.

Read and comply with the instructions concerning mechanical assemblies as per AMM Task 60-00-00, 3-1.

3.B. OPERATIONAL PROCEDURE 

3.B.1. Preliminary steps 

- Install the access equipment. 

- Remove the upper cowling as per AMM Task 53-51-00, 4-1 or MET Work Card 53.00.00.403. 

- Remove the front part of the tail gearbox fairing. 

3.B.2. Operational procedure on installed equipment 

3.B.2.a. Identification of the input lever bearing on the single hydraulic main and tail servo-controls (Figures 1 to 3) 

NOTE 1 

Photos in Figure 3 are given for information purposes in 

order to illustrate two types of bearing (compliant and 

non-compliant) on a lever removed from the servo-control. 

CAUTION 

DO NOT USE SOLVENT OR ANY OTHER 

PRODUCT TO CLEAN THE BEARING. 

- If necessary, remove the excess grease from the servo-control input lever bearing using a clean, dry cloth 

as per Detail B, Figure 2. 

- Make sure that there is no marking (a) on the sides of the external race (b) of the bearing as per Detail A, 

Figure 1: 

NOTE 2 

When there is a marking (a), it is located on one side of the 

external race (b) only. 

- If necessary: 

. use a mirror (yy) and a light source or a borescope (zz), 

or, 

. remove the servo-control as per AMM Task 67-32-00, 4-1 or 67-33-00, 4-1 or MET Work 

Card 67.30.00.402 or 67.30.00.403, in order to proceed with the check. 
 

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. If part of the marking (a) is visible on one of the sides of the external race (b), the servo-control is 

equipped with a non-compliant bearing. 

NOTE 3 

The marking (a) may be partially or completely hidden from 

view by the lever support (c). 

- Interpret the results in accordance with paragraph 1.E.1.a. or 1.E.2.a. 

. If no marking (a) is visible on the two sides of the external race, make sure that the marking (f) "RWG 

GERMANY 60-5593" is partially visible on at least one flange (d) of the bearing as per Detail C, Figure 2. 

NOTE 4 

The marking (f) on the flange is spread into 3 groups located 

at approximately 120 degrees from each other. 

- If necessary: 

. Use a mirror (yy) and a light source or a borescope (zz), 

or, 

. remove the servo-control as per AMM Task 67-32-00, 4-1 or 67-33-00, 4-1 or MET Work 

Card 67.30.00.402 or 67.30.00.403, in order to proceed with the check. 

- If part of the marking (f) "RWG GERMANY 60-5593" is visible, the servo-control is equipped with a 

compliant bearing: 

. Interpret the results in accordance with paragraph 1.E.1.a. or 1.E.2.a. 

- If none of the marking (f) "RWG GERMANY 60-5593" is visible, the servo-control is equipped with a 

non-compliant bearing: 

. Interpret the results in accordance with paragraph 1.E.1.a. or 1.E.2.a. 

3.B.2.b. Replacement of an installed servo-control 

- Remove the main or tail servo-control concerned as per AMM Task 67-32-00, 4-1 or 67-33-00, 4-1 or 

MET Work Card 67.30.00.402 or 67.30.00.403. 

- Return the servo-control concerned as per paragraph 2.D. 

- Install a compliant servo-control as per AMM Task 67-32-00, 4-1 or 67-33-00, 4-1 or MET Work 

Card 67.30.00.402 or 67.30.00.403. 

3.B.3. Final steps

- Install the front part of the tail gearbox fairing. 

- Install the upper cowling as per AMM Task 53-51-00, 4-1 or MET Work Card 53.00.00.403. 

- Remove the access equipment. 
 

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3.B.4. Operational procedure on non-installed equipment 

3.B.4.a. Identification of the input lever bearing on the single hydraulic main and tail servo-controls (Figures 1 to 3) 

NOTE 5 

Photos in Figure 3 are given for information purposes in 

order to illustrate two types of bearing (compliant and 

non-compliant) on a lever removed from the servo-control. 

CAUTION 

DO NOT USE SOLVENT OR ANY OTHER 

PRODUCT TO CLEAN THE BEARING. 

- If necessary, remove the excess grease from the servo-control input lever bearing using a clean, dry cloth 

as per Detail B, Figure 2. 

- Make sure that there is no marking (a) on the sides of the external race (b) of the bearing as per Detail A, 

Figure 1: 

NOTE 6 

When there is a marking (a), it is located on one side of the 

external race (b) only. 

. If part of the marking (a) is visible on one of the sides of the external race (b), 

the servo-control is equipped with a non-compliant bearing. 

NOTE 7 

The marking (a) may be partially or completely hidden from 

view by the lever support (c). 

- Interpret the results in accordance with paragraph 1.E.1.b. or 1.E.2.b. 

. If no marking (a) is visible on the two sides of the external race, make sure that the marking (f) "RWG 

GERMANY 60-5593" is partially visible on at least one flange (d) of the bearing as per Detail C, Figure 2. 

NOTE 8 

The marking (f) on the flange is spread into 3 groups located 

at approximately 120 degrees from each other. 

- If part of the marking (f) "RWG GERMANY 60-5593" is visible, the servo-control is equipped with a 

compliant bearing: 

. Interpret the results in accordance with paragraph 1.E.1.b. or 1.E.2.b. 

- If none of the marking (f) "RWG GERMANY 60-5593" is visible, the servo-control is equipped with a 

non-compliant bearing: 

. Interpret the results in accordance with paragraph 1.E.1.b. or 1.E.2.b. 
 

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3.B.4.b. Replacement of a non-installed servo-control 

- Return the servo-control concerned as per paragraph 2.D. 

3.C. IDENTIFICATION 

 Identification of this document: 

. Record compliance with this ALERT SERVICE BULLETIN: 

- Indicate the number of the ALERT SERVICE BULLETIN corresponding to the helicopter concerned in 

the helicopter documents, 

and, 

. If the S/N does not correspond to the S/N listed in paragraph 4.A. and the servo-control has not been 

repaired in the period from September 27, 2012 to January 30, 2013 by “UTC AEROSPACE SYSTEMS”, 

in the “MONROE, N/C, USA” repair station: 

- Leave the Log Card (FM) as is. 

. In all other cases: 

- If there is a "B" marked and visible in the area defined in paragraph 4.B:

. Leave the Log Card (FM) as is. 

- If no "B" marking is visible in the area defined in paragraph 4.B:

. For the single hydraulic main servo-controls: 

- Record compliance with the ALERT SERVICE BULLETINs corresponding to the AS350 and AS550 

helicopters, as well as the result of the check (compliant or non-compliant), on the Log Card (FM), as 

per MTC Work Card 20.08.05.101. 

. For the single hydraulic tail servo-control: 

- Record compliance with the ALERT SERVICE BULLETINs corresponding to the AS350, AS355, 

AS550 and AS555 helicopters, as well as the result of the check (compliant or non-compliant), on the 

Log Card (FM), as per MTC Work Card 20.08.05.101. 

 Identification of modifications on the documentation: 

Not applicable. 

3.D. OPERATING AND MAINTENANCE INSTRUCTIONS 

 Not applicable. 
 

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(See Figures 1 and 2) 

Marking on one side of the bearing's external race (non-compliant servo-control) 

Figure 1

A - B - C 

a 

c 

d 

b 
 

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(See Figure 1) 

Grease located on the single hydraulic servo-control input lever bearing

(See Figure 1) 

"RWG GERMANY 60-5593" marking partially visible on a sealing flange of the bearing 

(compliant servo-control) 

Figure 2 

f 

b 

d 
 

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One of the sides of the external race 

without marking Figure 3

Compliant servo-control: 

Non-compliant servo-control: 

Side 1: flange with marking Side 2: flange with marking 

One of the sides of the external race 

with marking 

Areas to be checked 
 

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4. APPENDIX 

4.A. List of single hydraulic servo-controls concerned by compliance with this ALERT SERVICE 

BULLETIN

Equipment (MP/N) Serial Number (S/N) 

SC5072 2921

SC5072 2961 

SC5072 2962 

SC5072 2966 

SC5072 2967 

SC5072 2968 

SC5072 2971 

SC5072 2972 

SC5072 2973 

SC5072 2974 

SC5072 2975 

SC5072 2976 

SC5072 2977 

SC5072 2978 

SC5072 2979 

SC5072 2980 

SC5072 2981 

SC5072 2982 

SC5072 2983 

SC5072 2984 

SC5072 2985 

SC5072 2986 

SC5072 2987 

SC5072 2988 

SC5072 2989 

SC5072 2990 

SC5072 2991 

SC5072 2993 

SC5072 2994 

SC5072 2995 

SC5072 2996 

SC5072 2997 

SC5072 3000 

SC5072 3004 

SC5072 3005 

SC5072 3009 

SC5072 3010 

SC5072 3012 

SC5072 3013 

SC5072 3014 

SC5072 3016 

SC5072 3020 

SC5072 3022 

SC5072 3024 

SC5072 3027 

SC5072 3028 

SC5072 3031 

SC5072 3032 

Equipment (MP/N) Serial Number (S/N) 

SC5072 3033 

SC5072 3034 

SC5072 3036 

SC5072 3038 

SC5072 3042 

SC5072 3043 

SC5072 3044 

SC5072 3046 

SC5072 3047 

SC5072 3048 

SC5072 3056 

SC5072 3057 

SC5072 3058 

SC5072 3059 

SC5072 3062 

SC5072 3063 

SC5072 3065 

SC5072 3073 

SC5072 3075 

SC5072 3076 

SC5072 3078 

SC5072 3082 

SC5072 3083 

SC5072 3084 

SC5072 3085 

SC5072 3088 

SC5072 3097 
 

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Equipment (MP/N) Serial Number (S/N) 

SC5083-1 5045

SC5083-1 5091

SC5083-1 5127

SC5083-1 5144

SC5083-1 5145

SC5083-1 5146

SC5083-1 5147

SC5083-1 5148

SC5083-1 5149

SC5083-1 5154

SC5083-1 5155

SC5083-1 5156

SC5083-1 5157

SC5083-1 5158

SC5083-1 5159

SC5083-1 5160

SC5083-1 5161

SC5083-1 5162

SC5083-1 5169

SC5083-1 5170

SC5083-1 5171

SC5083-1 5172

SC5083-1 5173

SC5083-1 5174

SC5083-1 5175

SC5083-1 5176

SC5083-1 5177

SC5083-1 5178

SC5083-1 5179

SC5083-1 5180

SC5083-1 5181

SC5083-1 5182

SC5083-1 5184

SC5083-1 5185

SC5083-1 5186

SC5083-1 5192

SC5083-1 5193

SC5083-1 5194

SC5083-1 5199

SC5083-1 5202

SC5083-1 5206

SC5083-1 5213

SC5083-1 5214

SC5083-1 5218

SC5083-1 5219

SC5083-1 5220

SC5083-1 5221

SC5083-1 5222

SC5083-1 5223

Equipment (MP/N) Serial Number (S/N) 

SC5083-1 5226

SC5083-1 5245

SC5083-1 5252

SC5083-1 5262

SC5083-1 5263

SC5083-1 5268

SC5083-1 5272

SC5083-1 5273

SC5083-1 5274

SC5083-1 5275

SC5083-1 5276

SC5083-1 5277

SC5083-1 5278

SC5083-1 5279

SC5083-1 5280

SC5083-1 5281

SC5083-1 5286

SC5083-1 5292

SC5083-1 5293

SC5083-1 5294

SC5083-1 5295

SC5083-1 5296

SC5083-1 5298

SC5083-1 5301

SC5083-1 5308

SC5083-1 5310

SC5083-1 5311

SC5083-1 5312

SC5083-1 5314
 

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Equipment (MP/N) Serial Number (S/N) 

SC5084-1 2695

SC5084-1 2701

SC5084-1 2702

SC5084-1 2704

SC5084-1 2714

SC5084-1 2715

SC5084-1 2716

SC5084-1 2719

SC5084-1 2720

SC5084-1 2721

SC5084-1 2722

SC5084-1 2723

SC5084-1 2724

SC5084-1 2726

SC5084-1 2751

SC5084-1 2754

SC5084-1 2756

SC5084-1 2757

SC5084-1 2776

SC5084-1 2777

SC5084-1 2780

SC5084-1 2781

SC5084-1 2786

SC5084-1 2787

SC5084-1 2788

SC5084-1 2789

SC5084-1 2790
 

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Identification plate 

4.B. Letter "B" marking area

Letter "B" marking area on the identification plate of the single hydraulic main and tail servo-controls equipped 

with a compliant bearing. 

NOTE 1 

When a main single hydraulic servo-control or tail servocontrol is compliant, or during the process to make it 

compliant, it is identified by a "B" marked on its identification 

plate. 

D 

B 

Letter "B" marking area 
 

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4.C. Table 

The servo-control was not repaired 

during the period from 

September 27, 2012 to January 30, 

2013 at “UTC AEROSPACE 

SYSTEMS” premises in the 

“MONROE, N/C, USA” repair 

station. 

The servo-control was repaired 

during the period from 

September 27, 2012 to January 30, 

2013 at the “UTC AEROSPACE 

SYSTEMS” premises in the 

“MONROE, N/C, USA” repair 

station.

The servo-control S/N does not 

correspond to the S/N listed in 

paragraph 4.A.

Helicopters/installed equipment 

The servo-control is equipped with 

a compliant input lever bearing, 

comply with paragraph 3.C. then 

resume flights. 

Non-installed equipment 

The servo-control is equipped with 

a compliant input lever bearing, 

leave as is. 

The servo-control S/N 

corresponds to the S/N listed in 

paragraph 4.A.

Helicopters/installed equipment 

- If there is a "B" marked, the servo-control is equipped with a compliant 

input lever bearing. 

. Comply with paragraph 3.C. 

. Resume flights. 

- If there is no "B" marked:

. Before resuming flights, comply with paragraphs 3.A., 3.B.1., 3.B.2.a. 

and 3.C. 

Non-installed equipment 

- If there is a "B" marked, the servo-control is equipped with a compliant 

input lever bearing. 

. Leave as is.

- If there is no "B" marked:

. Comply with paragraphs 3.B.4.a. and 3.C.