ASB 206L-11-169B 

Page 1 of 6 

ECCN EAR99 

 

 ALERT SERVICE BULLETIN 206L-11-169 

29 June 2011 

Revision B, 29 August 2011 

MODEL AFFECTED: 206L Series

SUBJECT: CLEVIS ASSEMBLY – HYDRAULIC SERVO 

ASSEMBLIES, PART NUMBER 206-076-062-103 

HELICOPTERS AFFECTED: Bell 206L helicopters all serial numbers, 206L1 all 

serial numbers, 206L3 all serial numbers and 

206L4 serial number 52001 through 52430, 

equipped with servo actuators 206-076-062-103. 

Serial numbers 52431 and subsequent will have the 

intent of this bulletin accomplished prior to delivery. 

 

COMPLIANCE: Perform a one- time inspection prior to next flight. 

DESCRIPTION: 

It has been brought to Bell Helicopter’s attention that some hydraulic servos affected in 

the ASB 206L-05-136 Revision A have not been submitted to the accomplishment 

instructions of the subject bulletin. The purpose of this ASB is to request operators to 

verify and ensure that the hydraulic servo actuators meet the intent and have complied 

with the original bulletin. Any spare part shall comply with this bulletin prior to its 

installation on an aircraft. 

Revision A of this bulletin makes mandatory the inspection of all hydraulic servo 

assemblies 206-076-062-103 to be inspected prior to next flight, unless previously 

accomplished. 

Revision B of this bulletin modifies the location used for the identification of the 

actuator. 

APPROVAL: 

The engineering design aspects of this bulletin are Transport Canada Civil Aviation 

(TCCA) approved. 
ASB 206L-11-169B 

Page 2 of 6 

ECCN EAR99 

CONTACT INFO: 

For any questions regarding this bulletin, please contact: 

Bell Helicopter Product Support Engineering - Light Helicopters 

Tel: 450-437-2862 / 1-800-363-8023 / pselight@bellhelicopter.textron.com 

MANPOWER: 

Approximately 1 man-hour per actuator is required to accomplish this bulletin. This 

estimate is based on hands-on time, and may vary with personnel and facilities 

available. 

WARRANTY: 

There is no warranty credit applicable for parts or labor associated with this bulletin. 

MATERIAL: 

Required Material: 

The following material is required for the accomplishment of this bulletin and may be 

obtained through your Bell Helicopter Textron Supply Center. 

Part Number Nomenclature Qty 

 

48088996-002 Plate, mod 1(Note1) 

Note 1: Modification plate may not be required if currently installed on servo actuator. 

Consumable Material: 

None required. 

SPECIAL TOOLS: 

None required. 

WEIGHT AND BALANCE: 

Not affected. 

ELECTRICAL LOAD DATA: 

Not affected. 
ASB 206L-11-169B 

Page 3 of 6 

ECCN EAR99 

REFERENCES: 

BHT-206L-MM-1 Maintenance Manual, Chapter 29. 

BHT-206L1-MM-1 Maintenance Manual, Chapter 29. 

BHT-206L3-MM-1 Maintenance Manual, Chapter 67. 

BHT-206L4-MM-1 Maintenance Manual, Chapter 67. 

PUBLICATIONS AFFECTED: 

None affected. 

ACCOMPLISHMENT INSTRUCTIONS: 

One time inspection of the hydraulic servo assemblies 206-076-062-103. 

-NOTEFor all hydraulic actuators part number 206-076-062-103 

which were inspected in accordance with the original 

release of this bulletin, proceed with re-identification of 

actuator per Step 3

1. Remove the necessary fairings/panels to gain access to the hydraulic servo actuator 

areas (applicable model Maintenance Manual, Chapter 29 and 53). 

2. Retract the boot (230, Figure 1) and perform the following inspections: 

a. Applying hand pressure only, check if nut, shaft or the clevis assembly (225, 215 

and 205) will turn independently from one another. 

b. If the shaft will turn independently to the nut or clevis assembly, prior to next 

flight, the actuator shall be removed from service and forwarded to WHRT or one 

of WHRT Approved Service Centers listed below. 

c. If the shaft will not turn independently from the nut or the clevis assembly check if 

at least one tab of the lock washer (220) is bent flush against one of the flat 

surfaces of the nut (225) and if at least one tab of the lock washer is bent flush 

against one of the flat surfaces of the clevis assembly (205). If the lock washer 

tabs are not bent flush against the nut and clevis assembly or are not in line with 

the flats, proceed with Step d. 

d. If the lock washer tabs are not bent flush against the nut or clevis assembly flat 

surface, use needle-nose pliers and make sure the lock washer tab is flush 

against the nut or the flat surface of the clevis assembly. 
ASB 206L-11-169B 

Page 4 of 6 

ECCN EAR99 

e. If the lock washer tabs are not aligned with a flat surface of the nut or the clevis 

assembly, prior to next flight, the actuator shall be removed from service and 

forwarded to WHRT or one of WHRT Approved Service Centers listed below. 

3. If the servo meets all the requirements of the inspection, re-identify the actuator data 

plate as follows: 

a. Using a vibrating stylus add the letter “V” at the end of the Bell part number onto 

the data plate as follow: 

206-076-062-103V 

-NOTEIf required missing modification plate can be ordered from 

Bell Helicopter Textron Supply Centers or Woodward HRT 

Approved Service Centers 

 

4. Make an entry in the helicopter logbook and historical service records indicating 

compliance with Revision A of this Alert Service Bulletin. 

List of Woodward HRT Approved Service Centers (1). 

Woodward HRT 

25200 West Rye Canyon Road 

Santa Clarita, CA 91355-USA 

Tel-+1-661-294-6000

AEM Ltd 

8 Wilton Road 

Haine Industrial Estate 

Ramsgate, Kent CT12 5HE –England-UK 

Tel-+44-1-843-591-381 

Helitrades-East 

18 Terry Fox Drive 

Vanleek Hill, Ontario, Canada KOB IRO 

Tel- (613) 678-3027 

Helitrades-West 

Site 5. Box 7, RR 2 Airdrie Airport 

Airdrie, Alberta, Canada KOB 1RO 

Tel-(403)912-4658 

JAMCO Corp 

6-11-25 Osawa Mitaka 

Tokyo 181-Japan 

Tel-+81-422-31-6111 

Motorflug GmbH 

Baden-Airpark, Gebaude C-312 

D-77836 Rheinmuster, Germany 

Tel-+49-7229-301-430

W.H. Brennan & Co Pte Ltd

47 Loyang Way, Singapore 508739 

Tel- +65 65495111 
ASB 206L-11-169B 

Page 5 of 6 

ECCN EAR99 

Note: 

1. Prior returning any servo to a Woodward HRT approved service center, contact Bell 

Helicopter Product Support with the following information: 

a. Servo assembly part number and serial number. 

b. Time since new and time since overhauled or repaired and the facility if the servo 

was recently overhauled or repaired. 

c. Helicopter serial number. 
ASB 206L-11-169B 

Page 6 of 6 

ECCN EAR99