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### ALERT SERVICE BULLETIN

AN APPROPRIATE ENTRY SHOULD BE MADE IN TH E AIRCRAFT LOGBOOK UPON ACCOMPLISHMENT IF OWNERSHIP OF AIRCRAFT HAS CHANGED PLEASE FORWARD TO NEW OWNER 206L-09-159

Nov 13, 2009 JUL 27, 2009

A 1 of 20

MODEL AFFECTED: 206L SERIES

SUBJECT: MAIN ROTOR BL ADE 206-015-001-107, /-109, /- 111, /-115, /-117, /- 119 and -121 CHECK OF.

HELICOPTERS AFFECTED: 206L Helicopt ers serial number 45004 through 45153 and 46601 through 46617.

206L-1 Helicopters serial number 45154 through 45790.

206L-1 Helicopters converted to 206L-1+ per BHT-206-SI-2052.

206L-3 Helicopters serial number 51001 through 51612.

206L-3 Helicopters converted to 206L-3+ per BHT-206-SI-2052.

206L-4 Helicopters serial number 52001 through 52380

206L-4 Helicopters 52381 and subsequent will have main rotor blades installed at time of delivery that are not affected by this bulletin.

BLADES AFFECTED: Main rotor blades 206-015-001-107, /-109, /-111, /-115, /-117, /-119 and - 121 with serial number A-xxxx as listed in Table 1 that have accumulated more than 800 flight hours are affected by this bulletin.

Main rotor blades 206-015-001-115, /-117, /-119 and -121 serial number A-6715 and subsequent are not affected by this bulletin. A

AASB 206L-09-159 Page 2 of 20

Table 1. List of affected blades (Note 1)

901 to 928 2285 to 2286 2787 to 2788 4 293 to 4298 4684 930 to 935 2290 2808 to 2817 4 301 4686 to 4708 937 to 938 2292 to 2294 2819 to 2822 4 305 4710 941 2297 2824 4 308 4 713 to 4716 943 to 994 2301 to 2302 2826 to 2828 4 314 to 4315 4719 to 4722 996 to 1000 2304 to 2305 2832 4 318 4725 1002 to 1020 2308 2835 4 330 4728 to 4729 1022 to 1032 2311 2840 to 2842 4 334 to 4336 4731 1034 to 1047 2313 to 2314 2844 4 381 to 4382 4734 to 4737 1049 to 1134 2316 2848 to 2850 4 392 4739 to 4742 1136 to 1140 2318 to 2319 2852 to 2853 4 394 to 4395 4744 to 4751 1142 to 1157 2322 to 2324 2855 4 405 to 4409 4753 to 4757 1159 to 1166 2328 to 2331 2858 4 416 4759 1168 to 1182 2357 2862 to 2864 4 418 4762 1184 to 1351 2374 2900 4 423 to 4426 4764 1353 to 1363 2379 2996 4 433 4774 1365 to 1382 2515 3212 4 445 4778 to 4780 1384 to 1401 2553 to 2554 3219 4 448 4784 1403 to 1519 2561 to 2562 3339 4 462 to 4463 4786 to 4825 1521 to 1590 2564 to 2570 3369 4 484 4827 to 4840 1593 to 1646 2573 3381 4 500 4842 to 4863 1648 to 1718 2576 3447 4 508 4865 to 4905 1720 to 1798 2580 3571 to 3572 4 512 4907 to 4948 1800 to 1821 2583 3622 4 517 4950 to 4957 1824 to 1829 2585 to 2586 3705 4 522 4959 to 4963 1832 to 2060 2588 to 2589 3831 4 528 to 4529 4965 2062 to 2072 2593 to 2594 3971 to 3972 4 532 4969 to 4973 2074 2596 to 2597 4 025 to 4030 4 534 4975 2077 to 2081 2599 4 117 4 547 4979 to 4980 2092 to 2095 2602 4 143 4 550 4983 to 4984 2098 to 2099 2604 to 2605 4 201 to 4205 4 567 4987 2101 to 2104 2607 to 2610 4 209 4 573 4989 2107 to 2108 2621 4 214 to 4217 4 590 4992 2110 to 2124 2623 to 2624 4 248 4 604 to 4605 4994 to 5006 2126 to 2145 2638 4 250 to 4251 4 608 to 4609 5010 2147 to 2158 2640 to 2672 4 253 to 4254 4 612 to 4621 5015 2161 to 2163 2674 to 2701 4 256 to 4260 4 624 to 4629 5018 2165 to 2166 2706 to 2708 4 262 to 4267 4 631 to 4632 5023 2169 to 2175 2727 to 2728 4 269 4638 to 4639 5036 2177 to 2183 2730 to 2742 4 271 to 4272 4 652 5047 2185 to 2192 2744 to 2764 4 274 to 4276 4 654 5054 2220 to 2221 2766 to 2767 4 278 4 657 5066 to 5067 2248 2769 4 280 to 4284 4 659 5071 to 5072ASB 206L-09-159 Page 3 of 20

2257 to 2267 2771 to 2772 4 286 to 4287 4662 5075 to 5076 2272 to 2283 2775 to 2777 4 290 to 4291 4666 to 4682 5081 5087 5397 5535 to 5537 5679 to 5686 5851 5094 5399 to 5400 5539 to 5540 5688 5856 5152 5402 to 5411 5542 5690 to 5705 5861 to 5865 5155 5413 to 5414 5546 to 5549 5707 to 5709 5870 5158 to 5159 5416 to 5439 5552 to 5553 5711 to 5712 5882 5163 to 5164 5441 5556 to 5561 5716 to 5721 5884 to 5886 5166 to 5171 5443 to 5445 5566 to 5568 5723 to 5726 5889 to 5891 5176 to 5178 5447 5570 to 5574 5729 to 5734 5899 to 5901 5180 to 5182 5450 5576 to 5583 5736 to 5745 5903 to 5905 5186 to 5191 5459 5588 to 5591 5747 to 5752 5912 5193 to 5199 5465 to 5468 5594 5757 5915 5201 to 5205 5472 5598 to 5600 5762 5921 5207 5475 5602 to 5605 5766 to 5769 5925 to 5926 5209 to 5212 5481 5608 to 5609 5771 5929 to 5951 5218 to 5253 5483 5612 5781 to 5782 5992 5255 to 5273 5488 5616 to 5623 5791 6216 5275 to 5288 5491 to 5492 5625 to 5626 5793 to 5800 6247 5291 to 5292 5495 5628 5808 6270 5297 to 5298 5497 to 5507 5637 to 5641 5815 to 5817 6597 5301 to 5321 5509 to 5512 5643 5822 to 5826 6611 to 6612 5323 to 5331 5516 5645 to 5653 5828 to 5829 6661 5333 to 5340 5518 to 5521 5655 to 5666 5833 6714 5343 5526 to 5530 5668 to 5669 5837 5345 to 5395 5533 5671 to 5677 5844 to 5845

Note: 1. All blades listed abov e have the prefix A.

COMPLIANCE:

PART I. For blades in Spares stock, immediately upon receipt of this bulletin. For blades installed on a helicopter that have accumulated more than 800 flight hours within the next 30 days or 50 flight hours which ever comes first.

PART II. Within the next 60 engine starts following accomplishment of Part I and every 60 engine starts thereafter. This check is to be performed on blades that have accumulated more than 800 flight hours and repeated until the blade is removed from servic e or as instructed in Part III of this bulletin.ASB 206L-09-159 Page 4 of 20

PART III. At the operat or’s option.

After review of the spar radiographs by Bell Helicopter, a letter will be provided indicating that the blade can remain in service with no further action required (terminating action to this bulletin) or, that the blade can remain in service provided that Part II of this bulletin is accomplished until retirement from service.

DESCRIPTION:

Bell's investigation of a M odel 206L-1 accident last ye ar (Information Letter 206L-08- 85) revealed that a main rotor blade fractur ed as a result of fatigue. The investigation established that a fatigue crack could occur if there was a combinat ion of both residual stress in the spar and a larger than acc eptable void in the adhesive applied between the blade's internal lead iner tia weight and the spar, between blade stations 100 and 145. If such a condition exists, a fatigue cr ack may be induced by the centrifugal force variation that occurs during the helicopter start/stop cycles.

Main rotor blades affected by this bulletin may have the described combination of both residual stress in the spar and an adhesive vo id between the internal lead inertia weight and the blade spar. To be cons idered at risk of developing a crack, both conditions have to be met. All blades listed in Table 1 may have residual stress in the spar. However, they may not have voids between the inertia weig ht and the spar. The presence of residual stress in the spar can not be verified by any means of inspection. However, an X-Ray inspection of the spar can identify if an unacceptable void exists between the inertia weight and the spar. If, a fter accomplishment of Part III of this bulletin, it is confirmed that no void exceeding the limita tion is found, the blade is no longer considered at risk and no further accomp lishment of Part II will be required.

PART I of this Alert Service Bulletin provides in structions to identify main rotor blades that are affected.

PART II of this Alert Service Bulletin introdu ces a recurring blade spar wipe check for a crack in all affected blades installed on a helicopter. AASB 206L-09-159 Page 5 of 20

PART III of this Alert Service Bulletin provides instructions to perform a one-time XRay inspection of all affected blades. This in spection consists of taking X-rays of the blade spar that will be sent to Bell Helic opter for review. Afte r review, depending on the result, Bell Helicopter will issue a letter that cont ains one of the following statements:

 The blade can remain in service with no further action required (terminating action to this bulletin). Or,

 The blade can remain in service but Part II of this bulletin requires accomplishment until retirement from service.

The Radiography must be taken by a Non-De structive Inspection (NDI) Facility that has experience with accomplishing X-Ray for the aerospace industry. The NDI facility shall also be capable of performing the work descri bed in Part III of the ACCOMPLISHMENT INSTRUCTION of this Alert Service Bulletin. Owners/operators can contact their local Bell Helicopter Custom er Service Facility (CSF) or refer to the Bell Helicopter Custom er Support and Service Directory to locate in the CSF network the closest facility with X-Ray capability, or Bell Helicopter approved main rotor blade repair facility. In addition, a list of Facilities with X-Ray cap ability can be found in Table 2 of this Alert Service Bulletin. This list is not all inclusive and is provid ed as a reference. The X-rays can be taken with either the blade installe d or removed from the helicopter.

APPROVAL:

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

MANPOWER:

Approximately 1.0 man-hour is required to complete PART I and PART II of this bulletin.

Approximately 10.0 man-hours are required to complete PART III of this bulletin.

Man-hours are based on hands-on time, and may vary with pe rsonnel and facilities available. AASB 206L-09-159 Page 6 of 20

WARRANTY:

Owners / Operators of Bell Heli copters who comply with the in structions in this Bulletin and find a cracked blade will be eligible to receive a pro-rated credit for the replacement main rotor blade part num ber 206-015-001-115/-119 outlined under the required material section.

In addition Bell Helicopter will allow a credi t reimbursement for x-ray and freight costs up to a maximum of $1,000.00 per blade. This is retroactive back to July 27 2009. To receive this credit you will be required to prov ide copies of the invoices for both the xray and freight costs’ to the warranty department.

To receive either of the credits listed above:

 Purchase a replacement blade from a BHT supply source.

 Only those serial numbered blades that are listed in Table 1 of this bulletin are eligible fo r the x-ray and freight credit.

 Comply with the instructions c ontained in this Bulletin no later than the applicable hours in the “c ompliance section” of this ASB, or before July 27 2014.

 Submit an MMIR to the Bell Warr anty Department referencing this ASB for the replacement parts/x-ray & freight cost.

NOTE: Customers who fail to comply with the instructions in this Bulletin after the 5 years from date of issuance are not eligible for the special warranty exceptions listed above. No other labor cost will be covered under this Bulletin.

MATERIAL:

Required Material:

The following material is required for the accomplishment of this bulletin and may be obtained through your Bell Helico pter Textron Supply Center.

Part Number Nomenclature Quantity Note

206-015-001-115 Main Rotor Blade 1 1 206-015-001-119 Main Rotor Blade 1 1

Note: 1. Required only if a crack is foundASB 206L-09-159 Page 7 of 20

Consumable Material:

The following material is required to acco mplish this bulletin, but may not require ordering, depending on t he operator’s consumable material stock levels. This material may be obtained through your Bell He licopter Textron Supply Center.

Part Number Nomenclature Notes Quantity Reference

MILC87936TYI 5GAL Detergent 1 As required C-318 31-080AD002026 Decal 2 2 per blade N/A 3950 SCOTCHCAL Decal Sealer 3 As required C-349 TT-I735 ISOPROPYL Isopropyl Al cohol As required C-385 N/A Blue Food Coloring 4 As required N/A

Notes: 1. Or equivalent aviation approved detergent. 2. As an alternate, 0.25 inch X 2.50 in ches red stripes can be painted. Color code #11136, FED-STD-595. 3. Or equivalent sealer. 4. Locally procured.

SPECIAL TOOLS:

None required.

WEIGHT AND BALANCE:

Not affected.

ELECTRICAL LOAD DATA:

Not affected.

REFERENCES:

Customer Support and Services Directory

PUBLICATIONS AFFECTED:

BHT-206L-MM-1 Maintenance Manual, Chapter 5 and 62. BHT-206L1-MM-1 Maintenance Manual, Chapter 5 and 62. BHT-206L3-MM-1 Maintenance Manual, Chapter 5 and 62. BHT-206L4-MM-1 Maintenance Manual, Chapter 5 and 62.ASB 206L-09-159 Page 8 of 20

ACCOMPLISHMENT INSTRUCTIONS:

-NOTEPART I, Part II and PART III of th is Alert Service Bulletin can be accomplished with the blade installed on the helicopter.

PART I. Identification of aff ected main rotor blades.

1. Verify the part number and the serial num ber of the main rotor blades in Spares stock or installed on helicopter to determine if the blade is affected by this bulletin.

-NOTEDecal P/N 31-080AD002026 c an be ordered from Bell Helicopter.

2. In order to provide a quick visual reference and identify the “blades affected” by this ASB, apply the “red stripe” decal (or paint if preferred) on both sides of the blade at the location indicated on the Fi gure 3. To prolong t he life of the decal apply Edge sealer (C-349) on the decal. R eplace missing or damaged decal or reapply paint as required.

-NOTEThe marking of the spar at station 100 and 145 is required for accomplishment of Part II of this bulletin. For accomplishment of Part III b, the X-ray must be taken between stations 90 and 145 to ensure the complete section between stations 100 and 145 is captured.

3. Mark the top surface of affected bla des to identify blade station 100 and 145 as follows:

a. The center of the blade bolt is blade station 18.5 (b lade station zero being at the center of the mast). Us e a permanent ink marker and make marks at blade stations 100 and 145. Refer to Figure 3.

4. Make an entry in the helicopter technical records to show that the PART I of this Alert Service Bulletin has been accomplished. A

AASB 206L-09-159 Page 9 of 20

Part II. Recurring wipe check.

-NOTE-

"Your National Airworthiness Authority (N AA) should be contacted to determine who can accomplish this main rotor blade wipe check, as it may be acceptable to be accomplished by a trained pilot or by trained maintenance per sonal depending on the regulatory requirements of your NAA."

1. Gain access to main rotor blades upper surface.

2. Using detergent (C-318 or equivalent), thoroughly clean the blade upper surface between blade stations 100 to 145. Allow enough time for the blade upper surface to dry.

3. Check affected area (refer to Figure 3) for evidence of cracks as follows:

a. Prepare blue food coloring solution that will be used to perform the check by thoroughly mixing the followin g in a clean container:

 100 ml Isopropyl alcohol 99% (C-385)

 100 ml clean tap water or distilled water

 20 drops of blue food coloring

b. Apply the blue food coloring soluti on in the area to be checked using cheesecloth (C-486) saturated with the solution or apply with a spray bottle.

c. After 10 to 20 seconds, wipe off the solution with cheesecloth (C-486) in a spanwise direction.

d. Carefully check affected area for evidenc e of a crack. If a crack is present, the blue food coloring solution will remain in the crack as the excess of solution is wiped off and/or the cheesecloth will catch on the rough edges of the crack.

4. If a crack is found, remove the blade from service before further flight and contact Bell Helicopter Produc t Support Engineering.

-NOTEThe following inspection must be accomplished by a mechanic

5. If the blue food coloring solution wipe c heck as specified in step 3 above reveals a surface defect and the presence of a cr ack can not be confirmed, perform the following inspection: AASB 206L-09-159 Page 10 of 20

a. With a 10X power magnifying glass examine the affected area for a crack.

b. If a crack is found, remove the blade from service before further flight and contact Bell Helicopter Product Support Engineering.

c. If no crack is found, repair the def ect in accordance with the Component Repair & Overhaul manual.

6. Make an entry in the helic opter technical records to sh ow that the PART II of this Alert Service Bulletin has been accomplished and indicate the findings.

Part III. BLADE SPAR RADIOGRAPHY.

-NOTEIt should be noted that approximately 75% of the affected blades that have had the NDI accomplished, have passed the inspection and will not have to accomplish the recurring 60 engine starts wipe check.

Part III a. Selection of an NDI Facility.

-NOTEThe Radiography must be taken by a Non-De structive Inspection (NDI) Facility that has experience with accomplishing X-Ray for the aerospace industry. The NDI facility shall also be capable of performing the wo rk described in Part III b. of the ACCOMPLISHMENT INSTRUCTION of this Alert Service Bulletin. Owners/operators can contact their local Bell Helicopter Custom er Service Facility (CSF) or refer to the Bell Helicopter Custom er Support and Service Directory to locate in the CSF network the closest facility with X-Ray capability, or Bell Helicopter approved main rotor blade In addition, a list of Facilities with X-Ray cap ability can be found in Table 2 of this Alert Service Bulletin. This list is not all inclusive and is provid ed as a reference. The X-rays can be taken with either the blade installe d or removed from the helicopter.

-NOTEUntil the radiographs are review ed by Bell Helicopter and the disposition letter is received, affected blades can remain in service by complying with Pa rt II of this bulletin.

1. Advise the selected NDI Facility to contact Bell Helicopter Product Support Engineering (PSE) via e-mail at ps elight@bellhelic opter.textron.com for shipping details of the Radiographs. Bell Helicopt er will perform the anal ysis and provide the blade disposition to both Owner and the NDI Facility. A

AASB 206L-09-159 Page 11 of 20

2. It is acceptable to have the Radiographs taken with either the blade removed or installed on the helicopter. If the chosen NDI facility does not have the capability of performing Part III b with t he blade installed on the helic opter, remove the blade using the applicable maintena nce manual instructions and ship in a suitable container.

3. Provide a copy of this bulletin to your NDI Facility for accomplishment of Part III b.

Part III b. Radiography procedure.

-NOTEThe following inspection procedu re should only be used as a general guideline. The actual technique/procedure used shall be generated by the NDI Facility using technique parameters compatible with the equipment and processing chemistry utilized. Radiographs must be performed by individuals certified to a mini mum of Level II in radiography per NAS410, CGSB- 48.9712 (aerospace structures), or equivalent.

1. Thoroughly clean blade with deter gent (C-318 or equivalent).

-NOTEAffected blades previously inspected and answered by Bell, per original version of this bu lletin, will not require additional radiographs due to station change to 90.

2. The Radiograph of the s par is required between stati ons 90 and 145. Make sure the location is marked in accordance with Part I.

3. Perform the blade spar Radiograph as follows:

GENERAL GUIDELINES

Equipment

 Fixed or portable X-Ra y generating system capable of producing X-Rays of at least 75 kV and 5 mA energy and shall have a beryllium window. A focal spot no larger than 2.5 mm diameter is preferr ed for better results. Isotopes shall not be used.

 Either an automatic pr ocessor or hand development tanks are an acceptable means of processing r adiographs. Hand development shall be accomplished per the manufacturers instructions for type of film and chemicals used.

 Film must be class I or II. A

AASB 206L-09-159 Page 12 of 20

Personnel

 Radiograph must be performed by individuals certified to a minimum of Level II in radiography per NAS410, CGBS-48. 9712 (aerospace structures), or equivalent.
Pre-Inspection

 Ensure cassettes and/ or rollpac films are in good condition and clear of any contaminants which may cause film artifacts.

 Prior to film processing, solution concentration and radi ographic exposure repeatability should be checked at leas t once each week using a step wedge or equivalent.

 The part shall be clean and free of loose debris.

Inspection

1. Blade removed from helicopter.

a. Secure the blade to a stable platform such as sawhorses or blade dollies.

-NOTEThe marking of the spar at station 100 and 145 is required for accomplishment of Part II of this bulletin. For accomplishment of Part III b, the Radiography must be taken between stations 90 and 145 to ensure the complete section between stations 100 and 145 is captured.

b. The blade shall be X-Rayed at the bond line in the radius of the mid-span weight, refer to Figures 1 and 2, from stat ion 90 to station 145, refer to Figure 3.

c. Blade stations can be lo cated by placing a measuring tape at the center of the blade bolt hole. The center of the blade bo lt is blade station 18.5 (blade station zero being at the center of the mast). The blade should have marks at stations 100 and 145 previously made in Pa rt I. Refer to Figure 3.

d. Lead markers shall be placed on the bl ade to provide evidence of complete coverage and sufficient overlap. The film shall also contain lead numbers indicating blade P/N, S/N and station locations 90 and 145 as a minimum.

e. Align the X-Ray beam per pendicular to the blade lowe r surface and center the beam 0.8 inch from the leading e dge, refer to Figures 1 and 2.

f. Process the films and return them to Bell Helicopter for review. A

AASB 206L-09-159 Page 13 of 20

2. Blade install ed on helicopter.

a. Rotate the blades perpendicular to the tailboom, refer to Figure 1.

b. Stabilize the main rotor blades to prevent movement and film distortion.

c. Due to the static droop and pitch angl e of the blades, care must be taken to ensure the center of the X- Ray beam stays perpendicular to the bond line, refer to Figure 1.

d. Inspect affected blade per above step 1. b. to 1. f..

Recommended Technique

KV** 75 Ma 4.5 Time 2.0 Min SFD Min 36” Density Range* 1.5 to 3.5 Film Agfa D4

* Density should be meas ured on the leading edge adjac ent to the bondline. * Energy settings, film, and time ar e to be used as a reference only. **. Actual exposure technique should be based on energy levels capable of exposing 0.8 inch – 0.9 inch of alum inum to a density of 2.0.

3. Prepare the Radiographs for shipping an d include blade part and serial numbers with the total time in service.

4. Contact Bell Helicopter Product Suppo rt Engineering (PSE) via e-mail at pselight@bellhelic opter.textron.com for Radiographs shipping instructions. When contacting PSE, clearly specif y that the Radiographs are sent for accomplishment of ASB 206L-09-159 and make sure to provide the following detailed information for both the NDI Facility and blade Owner in order for Bell Helicopter to provide inspection results in a timely manner:

 Company name

 Contact name

 Phone number

 E-mail address

5. Bell Helicopter will analyze the content of the Radiographs and provide a letter indicating one of the following: A

AASB 206L-09-159 Page 14 of 20

a. The blade can remain in service with no further action required (terminating action to this bulletin). Or,

b. The blade can remain in service but Part II of this bulletin requires accomplishment until retirement from service. Or,

6. Make an entry in the helic opter technical records to show that the PART III of this Alert Service Bulletin has been acco mplished indicating the blade disposition based on the letter received by Bell Helicopter.

Table 2. List of NDI Facilities

Aviation NDT Services, PTY Ltd. Store 7, Gate 24 Operations Road Melbourne Airport Victoria, Australia 3045 Phone: 61-3-9395-0632 Australia Central Flying Service Inc. 12 th and Calhoun Little Rock, AR 72202 USA Phone: 1-800-844-6257 USA

Qantas Airways, Nondestructive Tests Section M96/1 Mascot Maintenance Base Sydney, New South Wales Australia 2020 Phone: 612-9691-7402 Australia CTC (Certified Testing & Consulting Services), LLC 3144 Venture Drive, Suite #100 Lincoln, CA 95648 USA Phone: 1-916-434-0195 USA

Sabena Technics Nondestructive Inspection Dept. Brussels National Airport, Hanger #8, Door #5 Zaventem, Brussels, Belgium B1930 Phone: 3212-53-55 Belgium Certified Inspection Services, LLC 3755 Industrial Court, NW, Suite #16 Suwanee, GA 30024 USA Phone: 1-678-730-2000 USA

CAL – Compoende Aeronautica Ltda Av. Dos Ipes, 391 Flor do Vale, Tremembe-Sao Paulo 12120-000 Brazil Phone: 55-12-3672-1911 Brazil E & I Aircraft 5525 N. W. 23 rd Avenue Ft Lauderdale Executive Airport Hangar #17 Fort Lauderdale, FL 33309 USA Phone: 1-954-771-9194 USA

Cantech Aviation Inspections Ltd 120-13451 Vulcan Way Richmond, British Columbia V6V 1K4 Canada Phone: 1-604-244-9699 Canada EPPS Aviation Inc. 1 Aviation Way Atlanta, GA 30341 USA Phone: 1-770-458-9851 USA

Execaire, a Division of I.M.P. Group Limited, 2450 Derry Road East, HGR7 Mississauga, Ontario Canada L5S 1B2 Phone: 1-905-677-2484 Canada ETI Ewer Testing & Inspection Inc. 1131 South 22 nd Street Bismarck, ND 58504 USA Phone: 1-701-223-6434 USA

Execaire, a Division of I.M.P. Group Limited, 10225 Ryan Avenue, Dorval, Quebec H9P 1A2 Canada Phone : 1-514-636-7070 Canada Flight Craft 7505 N.E. Airport Way Portland Oregon 97218 USA Phone: 1-503-331-4219 USAASB 206L-09-159 Page 15 of 20

Perimeter Aviation 626 Ferry Road Winnipeg, Manitoba Canada R3H 0T7 Canada Flight Options LLC 26180 Curtis Wright Parkway Richmond Heights, OH 44143 USA Phone: 1-216-797-8473 USA

RTD Quality Services Inc. 2280 Pegasus Way N.E. #8 Calgary, Alberta T2E 8M5 Canada Phone: 1-403-274-8214 Canada General Dynamics Aviation Services W6365 Discovery Drive Appleton, WI 54915 USA Phone: 1-920-735-7028 USA

Hainan Airlines Co. Ltd./FIC-CAAC NDT Office 16# No. 1Street Fugian, Beijing, China 100621 Phone: 8-610-645-85945 China General Dynamics Aviation Services 5616 Haven Street Las Vegas, NV 89119 USA Phone: 1-702-947-3030 USA

Aerospace NDT Ltd. Suite A, Bldg #6, Fourth Ave. Doncaster, South Yorkshire England DN9 3GE Phone: 44-1302-770771 England General Dynamics Aviation Services 6925 34 th Ave. south Minneapolis, MN 55450 USA Phone: 1-612-638-2053 USA

Morgan-Ward (NDT) ltd. Dale Road New Mills, High Peak, Derbyshire England Sk22 4NW Phone: 44 (0) 1663-74-7061 England General Electric Inspection Services 1211 Kona Drive Rancho Dominguez, CA 90220 USA Phone: 1-310-635-2700 USA

GIE – NDT Expert Sciences Parc du Perget 31770 Colomiers, France Phone : 33-53436-1200 France General Electric Inspection Services 5425 Business Parkway Theodore, AL 36582 USA Phone: 1-251-653-6060 USA

Aircraft Services Lemwerder (ASL) Flughafenstrabe 5 Lemwerder, 27809 Germany Phone: 49-421-672-2279 Germany JETS Inc. 1325 Whitlock Lane Carrollton, TX 75006 USA Phone: 1-972-323-6808 USA

RUAG Aerospace Services GmbH Flugplatz Oberpfaffenhofen Geb. 379 P.O. Box 1253 Wessling, Bayern D-82234 Germany Phone: 49-815-330-2897 Germany Metal Finishing Company 1329 South McLean Blvd Wichita, KS 67213 USA Phone: 1-316-267-7289 USA

Airworks India Engineering Pvt. Ltd Gate 8, Mumbai Old Airport Kalina, Santa Cruz (E) Mumbai, Maharashrta, India 400029 Phone : 91-22-2615-7213 India MidCoast Aviation, Inc. 6400 Curtis-Steinberg Drive Cahokia, IL 62206 USA Phone: 1-618-337-2100/Ext. 6351 USA

Air Four S.p.A. Viale Dell Aviazione 65 Milano, Italy 20138 Phone: 00-39-02-50673-404 Italy NDE Services Inc. 15552 E. Fremont Drive, Unit A106 Centennial, CO USA 80112 Phone: 1-303-741-0518 USA

CND Services (Controlli Non Distruttivi) SRL Via A. Flores, 17 Localita Monna Felicita (Zona Industriale Civitavecchia (RM) Italy 00053 Phone : 0039-766-580521 Italy NDT Inspect-Air Inc. 4557 96 th Street Franksville, WI USA 53126 Phone: 1-262-878-8700 USAASB 206L-09-159 Page 16 of 20

Nippi Corporation/Japan Aerospace Aircraft NDT Department 2-28 Soyagi, Yamamoto, Kanagawa, 242- 0026 Japan Phone: 046-265-2082 Japan Paragon Services, Inc. 1015 South West Street Whichita, KS 67213-1627 USA Phone: 1-316-945-5285 USA

Korean Air 1370 Gonghang-Dong Gangseo-Gu, Seoul, 157-712, Korea Phone: 82-2-660-7486 or 82-2-656- 7480 Korea Power Aviation Inc. 1255 Laquinta Drive Suite 112 Orlando, FL 32809 USA Phone : 1-407-438-1395 USA

Unit Inspection Aviation S.A. Hanger Z3 Lanseria International Airport Lanseria South Africa 1748 South Africa Phone: 11-27-701-3058 South Africa Q.C. Laboratories Inc. 2870 Stirling Road Hollywood, FL 33020 USA Phone: 1-954-925-0499 USA

FORCE Technology Sweden AB August Barks Gata 23B Vastra Frolunda, Goetborg, Sweden 42132 Phone: 046-031-490210 Sweden Quality Testing Services, Inc. 2305 Millpark Drive Maryland Heights, MO 63043 USA Phone: 1-314-770-0607 USA

SR Technics, TEQN Zurich Airport Zurich, ZH-8058 Switzerland Phone: 41-1-812752 Switzerla nd St. Louis Testing Laboratories Inc. 2810 Clark Avenue St. Louis, MO 63103 USA Phone: 1-314-531-8080 or 1-800- 264-1120 USA

CSE Citation Centre – UK Bournemouth IAP, Hanger #100 Christchurch, Dorset, UK BH23 6NW Phone: 44-0120-285-7759 United Kingdom Standard Aero (formerly Landmark Garrett Aviation Services) 1550 Hanger Road Augusta, GA 30906 USA Phone: 1-800-891-8889 USA

FR Aviation (formerly Flight Refueling Ltd.) Bournemouth International Airport Christchurch, Dorset BH23 6NE UK Phone: 1-44-01202-409000 United Kingdom Standard Aero (formerly Landmark Garrett Aviation Services) Springfield, Illinois 62707 USA Phone: 1-217-535-3596 USA

Marshall of Cambridge Aerospace Ltd Cambridge Airport, Cambridge UK CB5 8RX Phone: 44 (0) 1223-373216 United Kingdom Standard Aero (formerly Landmark Garrett Aviation Services) George Bush Int. Airport (IAH) 17250 Chanute Road Houston, TX USA Phone: 1-281-233-4150 USA

Material Measurements Ltd 61 Albert Road North Reigate, Surrey UK RH2 9RS Phone: +44 (0) 1737-222211 United Kingdom Standard Aero (formerly Landmark Garrett Aviation Services) 6201 West Imperial Highway Los Angeles, CA USA Phone: 1-310-568-3825 USA

Acuren Inspection Inc. 3101, 111 th St. SW, Unit “C” Everett, WA 98204 USA Phone: 1-425-355-5019 USA StarPort Cambata Aviation, Int. LLC 100 Starport Way Sanford, FL 32773 USA Phone: 1-407-321-8880 USAASB 206L-09-159 Page 17 of 20

Acuren – US Inspection Inc. 1485 Corporate Woods Parkway Union Town, OH 44685 USA Phone: 1-330-899-0566 USA Stork Twin City Testing Corporation 662 Cromwell Ave. St. Paul, MN 55114 USA Phone: 1-651-659-7440 USA

Aircraft NDT Service Inc. 6395 Technology Ave. Suite “C” Kalamazoo, MI 49009 USA Phone: 1-616-353-3658 USA Structural Testing Systems 97 Hering Drive L. I. MacArthur Airport Ronkonkoma, NY 11779 USA Phone: 1-516-981-0242 USA

All American Inspections 106 E. Turbo San Antonio, TX 78216 USA Phone: 1-210-525-0421 USA Tailwind Inspection, Inc. 3260 N Sheridan Road Tulsa, OK 74115 USA Phone: 1-918-832-0700 USA

Apex Inspections 2530 Tarpley Suite #200 Carrollton, TX 75006 USA Phone 1-972-418-5672 USA Tailwind Inspection, Inc. 70 – C King Spring Road Windsor Locks, CT 06096 USA Phone: 1-860-623-8600 USA

Applied Technical Services Inc. 1190 Atlanta Industrial Drive Marietta, GA 30066 USA Phone: 1-770-423-1400 USA Tailwind Inspection, Inc. 7515 Lemmon Ave. Dallas, TX 75209 USA Phone: 1-214-357-9595 USA

Applied Technical Services Inc. 214 Pelham Davis Circle Greenville, SC 29615 USA Phone: 1-864-675-6060 USA The Aerospace NDT Company Inc. (formerly Rogers NDT) 3418 Cypresswood Dr. Spring, TX 77388 USA Phone: 1-281-482-0228 USA

Applied Technical Services Inc. 1325 “B” Cavalier Blvd Chesapeake, VA 23323 USA Phone: 1-757-558-0016 USA THI (The Hangar Inc.) 2930 Winchester Road, Suite 500 Memphis, TN 38118 USA Phone: 1-901-345-8885 USA

Canyon State Inspection 3625 East Ajo Way Tucson, AZ 85713 USA Phone: 1-520-745-3672 USA Aerocentro De Servicios C.A. Aeropuerto Caracas-Edifico Aerocentro. Charallavre, Mirauda VZ Post Code 1210 Phone : 1-561-317-8848 Venezuela

Canyon State Inspection 103 South Southgate Chandler, AZ 85226 USA Phone: 1-480-783-7183 USA Airtech Servicios Aereos, C.A. Aeropuerto Caracas Oscar Machado Zuloaga Edif. Airtech Charallave, Miranda 4383 Venezuela (VE) Phone: 58-14-939-1949 VenezuelaASB 206L-09-159 Page 18 of 20

Figure 1. Radiograph wi th Blades Installed.ASB 206L-09-159 Page 19 of 20

Figure 2. Cross Section of Main Rotor Blade.ASB 206L-09-159 Page 20 of 20

Figure 3. Main Rotor Blade Area to be checked. A