ASB 407-11-96 Page 1 of 4 ECCN EAR99 ALERT SERVICE BULLETIN 407-11-96 29 June 2011

MODEL AFFECTED: 407

SUBJECT: CLEVIS ASSEMBLY – HYDRAULIC SERVO ASSEMBLIES, PART NUMBER 41011300 and 41011400

HELICOPTERS AFFECTED: Serial numbers 53000 through 53900, 53911 through 53999 and 54000 through 54070.

[Serial numbers 54071 and subsequent will have the intent of this bulletin accomplished prior to delivery.]

COMPLIANCE: For all hydraulic servo actuators specified in the Table 1, perform a one-time inspecti on prior to next flight.

For all hydraulic servo actuators part number 41011300-101 (BHT 206-0 76-062-105) serial numbers prior to 807 and part number 41011400-101 (BHT 206-076-062-107) serial numbers prior to 2248, that are not listed in T able 1, perform a one-time inspection within 25 flight hours or before July 31, 2011, whichever comes first.

DESCRIPTION:

It has been brought to Bell Helicopter’s attention that some hydraulic servos affected in the ASB 407-05-70 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 affected hydraulic servo actuators meet the intent and have complied with the original bulletin. Applicabil ity of this bulletin to any spare part shall be determined prior to its insta llation on an affected aircraft.

APPROVAL:

The engineering design aspects of this bulletin are Transport Canada Civil Aviation (TCCA) approved.ASB 407-11-96 Page 2 of 4 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 r equired to complete 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:

None required.

Consumable Material:

None required.

SPECIAL TOOLS:

None required.

WEIGHT AND BALANCE:

Not affected

ELECTRICAL LOAD DATA:

Not affected.

REFERENCES:

BHT-407-MM Maintenance Manual, Chapter 29. ASB 407-05-70 Revision A. HRT Service Bulletins 41011300-67-01 and 41011400-67-01ASB 407-11-96 Page 3 of 4 ECCN EAR99 PUBLICATIONS AFFECTED:

None affected.

ACCOMPLISHMENT INSTRUCTIONS:

1. Remove the necessary fairings/panels to ga in access to the hydraulic servo actuator areas (BHT-407-MM Chapter 29 and 53).

2. Determine if an affected hydraulic servo actuator is installed on the aircraft by verifying the component serial number scribed on the ident ification tag.

a. If hydraulic servo actuator is not affe cted by this bulletin, proceed to Step 4.

3. If hydraulic servo actuator is affected, per form inspection of the nut, shaft and clevis assembly in accordance with Accomplishment Instructions Step 2. B. Sub steps I through 6 inclusively, listed in HR Textro n Service Bulletin 41011300-67-01 and 41011400-67-01 previously publis hed with ASB 407-05-70 Revision A

a. If the servo meets all the r equirements of the inspection, verify if the modification plate identification has been annotated wit h “67-01”, as specified in the HR Textron bulletin.

b. If the modification plate is correctly identified, no further action is necessary.

c. If the modification plate is not correctly identified, mark the m odification plate in accordance with Step 2. C. listed in HR Textron Serv ice Bulletin 41011300-67-01 and 41011400-67-01 previously published with ASB 407-05-70 Revision A.

4. Make an entry in the aircraft historical records indicating compliance with this Alert Service Bulletin.ASB 407-11-96 Page 4 of 4 ECCN EAR99 Table 1.

WHRT P/N 41011300-101 (BHT P/N 206-076-062-105 and -111) WHRT P/N 41011400-101 (BHT P/N 206-076-062-107) HR0122 HR0064 HR0689 HR0492 HR0699 HR0564 HR0749 HR0565 HR0758 HR0660 HR0770 HR1121 HR0778 HR1132 HR0785 HR1183 HR1238 HR1577 HR1753 HR1790 HR1822 HR1842 HR1920 HR1955 HR1963 HR1974 HR2004 HR2056 HR2061 HR2116 HR2126 HR2135 HR2136 HR2138 HR2139 HR2145 HR2148 HR2198 HR2217 HR2236 HR2237 HR2238 HR2243