ASB 427-11-35 Page 1 of 4

ECCN EAR99 ALERT SERVICE BULLETIN 427-11-35

29 June 2011

MODEL AFFECTED: 427

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

41011700

HELICOPTERS AFFECTED: Serial numb ers 56001 through 56077, 58001 and

58002

Serial numbers 56078 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 206-076-062-111) serial numbers prior to 807 and part number 41011700-101 (BHT 206-076-062-109) serial numbers prior to 230,

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 427-05-12 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.ASB 427-11-35 Page 2 of 4

ECCN EAR99 APPROVAL:

The engineering design aspects of this bulletin are Transport Canada Civil Aviation (TCCA) approved.

CONTACT INFO:

For any questions regarding this bulletin, please contact:

Bell Helicopter Product Support Engi neering - Intermediate Helicopters Tel: 450-437-2077 / 1-800-463-3036 / psei nter@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:

None required.

Consumable Material:

None required.

SPECIAL TOOLS:

None required.

WEIGHT AND BALANCE:

Not affected.

ELECTRICAL LOAD DATA:

Not affected.ASB 427-11-35 Page 3 of 4

ECCN EAR99 REFERENCES:

BHT-427-MM, Chapter 53 and 67 Maintenance Manual.

ASB 427-05-12 Revision A

HRT Service Bulletins 41011300-67-01 and 41011700-67-01

PUBLICATIONS AFFECTED:

None affected.

ACCOMPLISHMENT INSTRUCTIONS:

1. Remove the necessary fairings/panels to gain access to the hydraulic servo actuator areas (BHT-427-MM Chapter 53 and 67).

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, perform inspection of the nut, shaft and clevis assembly in accordance with Acco mplishment Instructions Step 2. B. Sub steps I through 6 inclusively, listed in HR Textron Service Bulletin 41011300-67-01 and 41011700-67-01 previously published with ASB 427-05-12 Revision A

a. If the servo meets all the requirement s of the inspection, verify if the modification plate identification has been annotated with “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, ma rk the modification plate in accordance with Step 2. C. listed in HR Textron Service Bulletin 41011300-67- 01 and 41011700-67-01 previously publis hed with ASB 427-05-12 Revision A.

4. Make an entry in the aircraft historical records indicating compliance with this Alert

Service Bulletin

.ASB 427-11-35 Page 4 of 4

ECCN EAR99 Table 1

WHRT P/N 41011300-101 (BHT P/N 206-076-062-111)

HR0122

HR0689

HR0699

HR0749

HR0758

HR0770

HR0778

HR0785