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 act uators 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 inspecti on 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 pur pose of this ASB is to request operators to verify and ensure that the hydraulic servo ac tuators meet the int ent and have complied with the original bulle tin. Any spare part shall comply with this bulletin prior to its

installation on an aircraft.

Revision A of this bulletin makes mandator y the inspection of all hydraulic servo assemblies 206-076-062-103 to be inspected pr ior to next flight, unless previously accomplished.

Revision B of this bulletin modifies the lo cation 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 E ngineering - Light Helicopters Tel: 450-437-2862 / 1-800-363-8023 / pse light@bellhelicopter.textron.com

MANPOWER:

Approximately 1 man-hour per actuator is required to a ccomplish 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 t he accomplishment of this bulletin and may be obtained through your Bell Helico pter Textron Supply Center.

Part Number Nomenclature Qty

48088996-002 Plate, mod 1(Note1)

Note 1: Modification plate ma y 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 Maintenanc e 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 hydrau lic servo assemblies 206-076-062-103.

-NOTEFor all hydraulic actuator s part number 206-076-062-103 which were inspected in a ccordance with the original release of this bulletin, pr oceed with re-identification of actuator per Step 3

1. Remove the necessary fairings/panels to ga in access to the hydraulic servo actuator areas (applicable model Mainten ance 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 t he nut or clevis assembly, prior to next flight, the actuator shall be removed fr om service and forwarded to WHRT or one of WHRT Approved Service Centers listed below.

c. If the shaft will not turn i ndependently 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 leas t 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 flus h 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 surf ace 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 surfac e of the nut or the clevis assembly, prior to next flight, the act uator shall be removed from service and

forwarded to WHRT or one of WHRT A pproved 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 Supp ly 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 Appr oved 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 65495111ASB 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