ASB 407-11-96 

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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 inspection prior to next flight. 

For all hydraulic servo actuators part number 

41011300-101 (BHT 206-076-062-105) 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 Table 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 purpose 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. Applicability of this bulletin to any spare part shall 

be determined prior to its installation on an affected aircraft. 

APPROVAL: 

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

(TCCA) approved. 
ASB 407-11-96 

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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 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 41011400-67-01 
ASB 407-11-96 

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PUBLICATIONS AFFECTED: 

None affected. 

ACCOMPLISHMENT INSTRUCTIONS: 

1. Remove the necessary fairings/panels to gain 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 identification tag. 

a. If hydraulic servo actuator is not affected 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 Accomplishment Instructions Step 2. B. Sub steps I 

through 6 inclusively, listed in HR Textron Service Bulletin 41011300-67-01 and 

41011400-67-01 previously published with ASB 407-05-70 Revision A 

a. If the servo meets all the requirements 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, mark the modification plate in 

accordance with Step 2. C. listed in HR Textron Service 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 

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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