.,~~.J/IIr'.J/IIr'.J/IIr'~~.J/IIr'.J/IIr'.J/IIr'.J/IIr'.J/IIr'~.J/IIr' ... 

ALERT SERVICE BULLETIN ~ Bell Helicopter No. 206L-06-141 ~ 

DATE A Subsidiary ofTextron Inc. DATE SEP 12, 2006 , 

REV PAGE 

1 of10 ~ 

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MODEL AFFECTED: 

SUBJECT: 

HELICOPTERS AFFECTED: 

206L SERIES 

HORIZONTAL STABILIZER 206-023-119-167, 

INSPECTION AND REPLACEMENT OF 

All Model 206L4 listed in Table 1 and all model 

206L series that had the stabilizer 206-023-119-

167 replaced after March 01, 2004. 

TABLE 1: List of affected horizontal stabilizers 206-023-119-167 and 

the helicopter serial number they were installed on at delivery 

STABILIZER 

S/N 

BP1516 

BP1519 

BP1521 

BP1530 

BP1533 

BP1536 

BP1539 

BP1542 

BP1560 

BP1566 

BP1569 

BP1572 

BP1584 

BP1587 

ORIGINAL 

ALLOCATION 

52288 

52283 

52284 

52286 

52293 

52290 

52289 

52291 

52300 

52298 

52299 

52301 

Note 

Note 

STABILIZER 

S/N 

BP1607 

BP1608 

BP1610 

BP1612 

BP1615 

BP1622 

BP1629 

BP1630 

BP1631 

BP1634 

BP1643 

BP1646 

BP1659 

ORIGINAL 

ALLOCATION 

Note 

Note 

52315 

52312 

52313 

52314 

Note 

52316 

52318 

52317 

52319 

52320 

Note 

~ 

~ 

~ NOTE: 

These stabilizers were -- sold in Spare and may have been installed on 

any fielded 206L series 

IF OWNERSHIP OF AIRCRAFT HAS CHANGED PLEASE FORWARD TO NEW OWNER 

AN APPROPRIATE ENTRY SHOULD BE MADE IN THE AIRCRAFT LOGBOOK UPON ACCOMPLISHMENT 

~~~~~.JIIIII".JIIIII"~~.JIIIII"~.JIIIII"~.JIIIII".JIIIII" 
ASB 206L-06-141 

Page 2 of 10 

COMPLIANCE: 

DESCRIPTION: 

PART I AND PART II 

Within the next 1 00 hours but no later than 30 days 

after receipt of this bulletin and every 600 hours or 

annual inspection thereafter until PART Ill is 

accomplished. 

PART Ill 

No later than September 30, 2008. 

It has been determined by Bell Helicopter that the horizontal stabilizers 206-023-119-

167 as listed in Table 1, may have flaws present on the inside surface of the upper 

and/or lower skin at the tailboom attachment inserts area. Over time the flaws may 

produce cracks in the upper and/or lower skin 

PART I of this bulletin provides instructions to verify the serial number of the horizontal 

stabilizer. 

PART II of this bulletin introduces a first inspection and a recurring 600 hour I annual 

inspection that have to be performed until PART Ill can be accomplished. 

PART Ill of this bulletin mandates the replacement of all affected stabilizers. This will 

be considered as the terminating action for the recurring inspection introduced by 

PART II of this bulletin 

APPROVAL: 

The engineering design aspects of this bulletin are Transport Canada approved. 

MANPOWER: 

Approximately 2.5 man-hours are required to complete Part I of this bulletin. 

Approximately 4.0 man-hours are required to complete Part II of this bulletin. 

Approximately 8.0 man-hours are required to complete Part Ill of this bulletin. Manhours are based on hands-on time, and may vary with personnel and facilities 

available. 
WARRANTY: 

ASB 206L-06-141 

Page 3 of 10 

Owner I Operators of aircraft that have the subject serial numbers installed on their 

aircraft or that have the one or more of the subject serial numbers in their stock that 

comply with the instructions outlined in this bulletin are eligible for 100% credit for the 

replacement part mentioned in the "Required Material" section of this bulletin. 

To Receive This Credit: 

• Purchase the required part from an approved BHTI supply source. 

• Comply with this bulletin no later than 30 September, 2008. 

• Submit a completed MMIR report to BHTI no later than 30 days after completion of 

this bulletin. 

Customers that fail to comply with the instructions outlined in this bulletin before 

September 30, 2008 are not eligible for the special warranty provisions listed above. 

Exclusions To Warranty: 

Warranty consideration for parts found in the "Consumable Material" section of this 

bulletin and labor to inspect or remove and replace the horizontal stabilizer are not a 

subject of this ASB. 

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 Quantity 

206-023-119-167 Horizontal stabilizer 1 

Consumable Material: 

The following material is required to accomplish this bulletin, but may not require 

ordering, depending on the operator's consumable material stock levels. This material 

may be obtained through your Bell Helicopter Textron Supply Center. 
ASB 206L-06-141 

Page 4 of 10 

Part Number 

EC2216 B/A TAN N/S 

299-947-1 OOTY2CL2G50 

MIL-PRF-81733 TY2 PT 

ACETONE GALLON 

EWDE072 

299-947-110TY3CL 1 21 

PETROLATUM 13 OZ 

P-P-1 01 

CCCC0046 

Notes: 

Nomenclature 

Adhesive 

Adhesive 

Sealant 

Acetone (per Q-A-51) 

Primer 

Teflon tape (2 inch wide) 

Petrolatum jelly 

Aluminum oxide sandpaper 

Cheesecloth 

1. As an alternate, use Methyl Ethyl Ketone (C-309) 

2. As an alternate, use MIL-P-23377 

SPECIAL TOOLS: 

None required 

WEIGHT AND BALANCE: 

Weigh and balance is not affected. 

ELECTRICAL LOAD DATA: 

Not affected 

REFERENCES: 

BHT-206L-MM-5, Maintenance Manual, chapter 53 

BHT-206L 1-MM-5, Maintenance Manual, chapter 53 

BHT-206L3-MM-5, Maintenance Manual, chapter 53 

BHT-206L4-MM-5, Maintenance Manual, chapter 53 

Quantity 

1 

50 g 

1 pint 

I gallon 

1 quart 

1 roll 

13 oz 

1 

1 

Reference 

C-322 

C-317 

C-392 

C-316(Note 1) 

C-204(Note2) 

C-460 

C-008 

C-423 

C-486 

TB 206L-00-203 Horizontal Stabilizer Supports 206-023-131-ALL, Installation of 

PUBLICATIONS AFFECTED: 

BHT-206L-MM-1, Maintenance Manual, chapter 4 

BHT-206L 1-MM-1, Maintenance Manual, chapter 4 

BHT-206L3-MM-1, Maintenance Manual, chapter 4 

BHT-206L4-MM-1, Maintenance Manual, chapter 4 
ACCOMPLISHMENT INSTRUCTIONS: 

PART 1: Horizontal stabilizer serial number verification 

ASB 206L-06-141 

Page 5 of 10 

1. Determine if you have an affected horizontal stabilizer as listed in Table 1. Refer to 

Figure 1. Part number and serial number can be found on identification tag (30) 

that is located in the middle section of the trailing edge of the stabilizer (7). 

-NOTEHorizontal stabilizer does not require to be removed from tailboom. 

-NOTEDo not damage liquid shim compound between the lower supports 

(14) and stabilizer (7). If liquid shim is damaged during removal of 

the parts, the shimming procedure shall be repeated as described 

in TB 206L-00-203. 

2. Remove the screws (11) and the washers (12) from the L/H and R/H lower 

supports (14). 

3. Remove LIH and R/H lower supports (14). 

4. Remove screws (2) and the washers (3) attaching R/H fin let (1) to stabilizer (7). 

5. Disconnect position light wiring and carefully remove R/H fin let (1) from stabilizer 

(7). 

6. Remove nut (28), washers (27) and bolt (26). Detach control tube (29) from horn 

(19). 

7. Remove the three screws (23) and washers (24) from support (32). 

8. Remove the two screws (6) and washers (5) from the LIH fitting (4). Removal of 

the fitting (4) will allow the LIH and R/H elevator to move backward as an assembly 

and permit its removal without the requirement to remove the LIH finlet (1). 

CAUTION 

Do not drop the fitting (4) during the removal of the elevator (10) 

because it is free to move at the end of elevator (1 0). 
ASB 206L-06-141 

Page 6 of 10 

9. Slide elevator (1 0) aft until it clears the two pins (9) and remove the LIH and R/H 

elevator (1 0) as an assembly. 

10. Carefully remove the minimum amount of sealant covering the wiring and get 

access to the identification tag (30). Record the serial number. 

11.1f the serial number of the stabilizer is not listed in Table 1, reinstall the elevator 

(1 0) and stabilizer (7) as follows and make an entry to indicate that this bulletin has 

been accomplished. 

a. Position the fitting (4) at the end of LIH elevator (1 0). Slide the elevator 

assembly (1 0) through the tail boom opening and move forward assuring proper 

mating of pin (9) with hole provided in elevator (1 0). 

b. Attach LIH fitting (4) to fin (1) with washers (5) and screws (6). 

c. Attach support (32) to support (25) with the three washers (24) and screws (23). 

d. Attach control tube (29) to horn (19) with bolt (26) washers (27) and nut (28). 

e. Connect position light wiring and reinstall R/H fin let (1) with washers (3) and 

screws (2). 

f. Reinstall the L/H and R/H lower supports (14) with washers (12) and screws 

(11) 0 

12.1f you have an affected horizontal stabilizer, accomplish Part II immediately or Part 

Ill if a replacement stabilizer is available. 
ASB 206L-06-141 

Page 7 of 10 

PART II: Horizontal stabilizer- First inspection and recurring 600 hour I annual 

inspection 

1. Refer to figure 1. Inspect the horizontal stabilizer (7) as follows: 

-NOTEHorizontal stabilizer does not require to be removed from tailboom. 

-NOTEDo not damage liquid shim compound between upper and lower 

supports (13 and 14) and stabilizer (7). If liquid shim is damaged 

during removal of the parts, the shimming procedure shall be 

repeated as described in TB 206L-00-203. 

2. Remove the screws (11) and the washers (12) from the LIH and R/H lower 

supports (14). 

3. Remove LIH and R/H lower supports (14). 

4. Refer to Figure 1 Detail B. Clean and prepare lower surface of the stabilizer for 

inspection using cheesecloth (C-486) moistened with acetone (C-316). 

5. Inspect stabilizer in area of the inserts (31 ), on the lower surfaces for cracks and 

deformation using a 1 OX power magnifying glass. Inspect the area around each 

inserts and between inserts for debonding using tap test method. 

6. If any damage is found, the stabilizer is not repairable. Accomplish Part Ill 

immediately. 

7. If no damage is found , reinstall LIH and R/H lower supports (14) with screws (11) 

and washers (12). 

8. Remove the screws (11) and the washers (12) from the LIH and R/H upper 

supports (13). 

9. Remove LIH and R/H upper supports (13). 

10. Refer to Figure 1 Detail B. Clean and prepare upper surface of the stabilizer for 

inspection using cheesecloth (C-486) moistened with acetone (C-316). 

11 .1nspect stabilizer in area of the inserts (31 ), on the upper surfaces for cracks and 

deformation using a 1 OX power magnifying glass. Inspect the area around each 

inserts and between inserts for debonding using tap test method. 
ASB 206L-06-141 

Page 8 of 10 

12.1f any damage is found, the stabilizer is not repairable. Accomplish Part Ill 

immediately. 

13.1f no damage is found, reinstall upper supports (13) with screws (11) and washers 

(12). 

14. Make an entry in the helicopter records to indicate that Part II of this bulletin has 

been accomplished and that a recurring 600 hour or annual inspection is required 

until Part Ill is accomplished. 

PART Ill: Replacement of horizontal stabilizer 

-NOTEReplacement of the horizontal stabilizer requires re-shimming of the 

lower and upper supports (13 and 14). 

1. Remove and retire from service affected horizontal stabilizer. Install a serviceable 

horizontal stabilizer in accordance with the appropriate Maintenance Manual and 

TB 206L-00-203 for stabilizer shimming procedure. 

2. Make an entry in the helicopter records to indicate that this bulletin has been 

accomplished 
1. Fin 

2. Screw 

3. Thin aluminum washer 

4. Fitting 

5. Aluminum washer 

6. Screw 

7. Stabilizer 

8. Pin 

9. Pin 

10. Elevator 

11. Screw 

11 

ASB 206L-06-141 

Page 9 of 10 

12. Thin aluminum washer 

13. Support 

14. Support 

16. Nut 

18. Washer 

17. Screw 

18. Tube 

19. Hom 

20. Tube 

21. Slat 

22. Screw 06537002 

Figure 1 - Horizontal stabilizer, first inspection and 600 hour I annual inspection 

(Sheet 1 of 2) 
ASB 206L-06-141 

Page 10 of 10 

7 

23. Screw 

24. Thin aluminum washer 

29 25. Support 

26. Bolt 

27. Aluminum washer 

28. Nut 

29. Tube 

VIEW A-A 30. Identification tag 

31. Inserts 

32. Support 

~::: ~ 

c ··~ c f@:o;~LJ 

DETAIL B T..SIN. 

(38.1 mm) 

r:::z:zJ INSPECTION AREA 

Inspect stabilizer on upper and lower surfaces 06537001 

Figure 1 - Horizontal stabilizer, first inspection and 600 hour I annual inspection 

(sheet 2 of 2)