UH' k--0. AUTHORIZED RELEASE CERTtFICATE. FAA Form AIRWORTHINESS APPROVAL TAG N R FAA/UNITED STATES T42R821Y

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Cameron Walters
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1. Approving Civil Aviation Authority/Country: 2. AUTHORIZED RELEASE CERTtFICATE 3. Form Tracking Number: FAA/UNITED STATES FAA Form 8130-3 AIRWORTHINESS APPROVAL TAG N-93694 4.

1 1. Approving Civil Aviation Authority/Country: 2. AUTHORIZED RELEASE CERTtFICATE 3. Form Tracking Number: FAA/UNITED STATES FAA Form AIRWORTHINESS APPROVAL TAG N Organization Name and Address: A TS Components FAA Approved 5. Work Order/ContracVlnvoice Number: Trinity Blvd Ft Worth, TX Repair Station No. T42R821Y Work Order: Customer PO: R Item: 7. Description: 8. Part Number: 9. Quantity: 10. Serial Number: 11. Status/ Work: 1 RADOME ASSY 4426X Repaired 12. Remarks: TSN: CSN: TSO: CSO: Documents describing the actual work performed on work order # are provided. Note: See attached parts usage list for all replacement parts used. The described work was performed in accordance with FAA accepted I approved data for return to service by personnel who were part of a current drug and alcohol testing program as required by 14CFR120. REPAIRED IAW SAINT GOBAIN CMM, REV. 6, DATED 10/23/14, RTCADO-213A, DATED 03/ 17/16 AND DASH AMM , REV. 37, DATED 11 /15/16. 13a. Certifies the items identified above were manufactured in conformity to: 14a CFR 43.9 Return to Service D Other regulation specified in Block 12 D D Approved design data and are in a condition for safe operation. Certifies that unless otherwise specified in Block 12, the work identified in Block 11 and described in Block 12 was accomplished in accordance with Title 14, Code of Federal Non- approved design data specified in Block 12. Regulations, Part 43 and in respect to that work, the items are appoved for return to service. 13b. Authorized Signature: 13c. Approval/Authorization No.: 14b. Authorized Signature: 14c. Approval/Certificate No.: - N/A- - N/A- UH' k--0 T42R821Y 13d. Name (Typed or printed): 13e. Date (dd/mmm/yyyy): 14d. Name t yped or Printed): 14e. Date (dd/mmm/yyyy): - N/A- -N/A- Munna, Christopher 23/FEB/2017 User/Installer Responsibilities It is important to understand that the existence of this document alone does not automatically constitute authority to install the aircraft engine/propeller/article. Where the user/installer performs work in accordance with the national regulations of an airworthiness authority different than the airworthiness authority of the country specified in Block 1 it is essential that the user/installer ensures that his/her airworthiness authority accepts aircraft engine(s)/propeller(s)/article(s) from the airworthiness authority of the country specified in Block 1. Statements in Blocks 13a and 14a do not constitute installation certification. In all cases aircraft maintenance records must contain an installation certification,ssued in accordance with the national regulations by the user/installer before the aircraft may be flown. FAA FORM (02-14) NSN:

2 .componeijts Customer RO No R Unit P/N (in) Unit P/N (out) WORK ORDER Page 1 of 4 Part Number 4426X2-11 Part Number 4426X2-11 Cust Part Num Serial Number 221 Serial Number 221 FCS REQ No Works cope Repaired Workscope Repaired Warranty REQ No All REQ No Description RADOME ASSY Quantity 1 Reason for Removal Customer Instructions Manual Reference Type Number Rev Date Location Notes CMM OCT -14 CD TOWER SAINT GOBAIN OTHER RTCADO-213A MAR- 16 CD TOWER Trans Test OTHER NOV-16 CD TOWER DASH AMM Preliminary Inspection P/N Verified Yes S/N Verified Yes Repairs Required Yes Mechanic JAN-17 Comments Test N/A Comments Mechanic JAN-17 Perform TAC incoming review IAW TAC RSM/QCM Section Enter By JAN-17 Preliminary Functional Testing Issues and s Life Limited No AD Required No Verified part number and component traceability by comparison of part marking, if applicable, to customer provided documentation and IAW Saint-Gobain CMM. Part number is valid as noted. Inspected the part and reviewed part for any possible contamination or other Hidden damage as required Saint-Gobain CMM. Uncert Mechanic JAN-17 Inspector FEB-17 Perform moisture check on radome. Enter By JAN-17 Checked for any "unacceptable" readings of moisture, with Radome moisture meter IAW Saint-Gobain CMM , Chapter 2. (NOTE TO INSPECTOR: ANTI- STATIC COATING MAY LEAD TO IMPROPER READINGS ON THE MOISTURE METER. IF BAD READINGS ARE FOUND ; READINGS SHOULD BE CONFIRMED ON THE INSIDE OF RADOME SURFACE. THIS WILL MINIMIZE THE EFFECT OF THE ANTI- STATIC COATING) Process inspection: Good Uncert Mechanic Inspector FEB-17 Delaminated on inner surface at nose, 3" in circumference and at 5:00, up to 16" in length and up to 9.5" in width. Enter By JAN- 17 Repaired IAW Saint- Gobain CMM , Chapter 5. Performed prepreg lay- up. (Using SOM Items 9-12) (NOTE: CLASS 2 THAU CLASS 4 REPAIRS THAT ARE PREPREG LAY-UPS HAVE NO SIZE LIMIT, BUT MUST HAVE 4"" BETWEEN REPAIRS. NEITHER REPAIR PROCEDURE HAS A LIMIT TO THE AMOUNT OF REPAIRS THAT CAN BE PERFORMED) (NOTE: INNER AND OUTER SKINS ARE TWO [2) EACH PLIES THICK WITH AN ADDITIONAL PLY ON THE NOSE, TOP, AND BOTTOM AREAS. THE NOSE AND TOP PLIES OVERLAP TO CREATE A FOUR [4) PLY AREA) (NOTE: THIS REPAIR PROCEDURE WILL REQUIRE THE USE OF A BOND TOOL IN ORDER TO MAINTAIN PROPER CONTOUR OF THE RADOME SHELL ASSEMBLY) Uncert FEB-17 Mechanic FEB-17 Inspector FEB-1 7 Removal of damage. Uncert FEB-1 7 Cert Step sanded discrepant area to remove damaged plies. Removed any debris and wipe area clean with solvent. Inspected prepped area for any hidden or additional damage. Per Para. 4, Section 8. Uncert FEB- 17 Mechanic Inspector FEB- 17 CSD- EOl (04/08/2016) Rev 1

3 ecomi:,onejjrs WORK ORDER Issues and s Customer RO No R Page 2 of 4 Perform pre-preg lay- up. Uncert FEB- 17 Cert Applied prepreg fiberglass and film adhesive, lnspectedn for proper lay-up. Per Para. 4, Section D, Step 2. BMS REC AF163-2K REC Uncert FEB- 17 Mechanic Inspector FEB-17 Apply vacuum pressure and thermocouples. Uncert FEB- 17 Cert Placed Radome shell in TAC bond fixture, and locate at appropriate position. Attached a minimum of three (3) each thermocouples for temperature recording requirements. Applied bagging materials and a vacuum source of 24 inhg minimum, then check for leaks. Per Para. 4, Section D, Step 7. mini 24Hg" max 26Hg" Uncert FEB-17 Mechanic Inspector FEB-17 Cure repair. Uncert FEB- 17 Cert Cured repair at 210±10 for 60 minutes at 24 inhg minimum, then cure at 260 ±10 for 150 minutes. Rate of temperature rise is 2-8 Degrees F/min. Cool down rate is a maximum of 8 Degrees F/min until a temperature of 150 Degrees F, or less, is reached prior to releasing pressure source. Per Para. 4, Section 8. See cure chart: Passed Uncert FEB- 17 Mechanic Inspector FEB-17 Diverter strips are disbonded and worn. Enter By JAN- 17 Removed and reinstalled diverter strips IAW Saint-Gobain CMM Disassembly Chapter 3, Para. 2, Section A. Assembly Chapter 5, Para. 1, Section C rec Uncert FEB- 17 Mechanic FEB-17 Inspector FEB-17 Perform resistance check on diverter strips. Enter By JAN-1 7 Performed electrical conductivity testing of Diverters with milli- ohm meter IAW Saint- Gobain CMM , Chapter 4, Para. 2, Section E. Measure the internal rivet head to the internal surface of the embedded ground washer. Resistance should be below 10 milliohms. OR With a clamping screw & nut installed at the diverter termination, measure the exposed (uncoated) trim edge of lightning diverter to the internal surface of the embedded ground washer. Resistance should be below 2.5 milli- ohms, typical resistances are far lower. Recorded readings of diverter strips: #1.135milliohms #2.682milliohms #3.123milliohms milliohms #5.187milliohms Uncert Mechanic Inspector FEB- 17 Seal is worn Enter By JAN-17 Removed and replaced IAW Saint- Gobain CMM , Disassembly Chapter 3, Para 2, Section B. Assembly Chapter 6, Para 3, Section 1300L REC Uncert FEB-17 Mechanic FEB- 17 Inspector FEB- 17 Prime and Paint: Outer surface - white, gray, gold, and clear. Enter By FEB- 17

4 ~-componejirs Customer RO No R WORK ORDER Page 3 of 4 Issues and s Primed and Painted: Outer surface -white, gray, gold, and clear - IAW Saint Gobain CMM, Chapter 5, Para, 5. (**NOTE TO PAINTER: A COATING TEST COUPON WILL BE NEEDED FOR COATING THICKNESS CHECK; TO BE VERIFIED BY QUALITY DURING COATING APPLICATION PROCESS**) Uncert Mechanic FEB-17 Inspector FEB-17 Apply Surface filler. Uncert Cert FEB- 17 Applied surface filler per CMM requirements. QC to verify test coupon thickness (Max thickness 0.004") Actual Thickness: 1.81 mils PT LOT#8856 Uncert Apply Antistatic coating. Uncert Mechanic FEB- 17 Inspector FEB-17 Cert FEB-17 Applied anti- static coating per CMM requirements. QC to verify test coupon thickness (0.0005" O") 0.6 mils PT Lot # L T Uncert Mechanic FEB- 17 Inspector FEB- 17 Perform Resistance check of antistatic coating. Uncert Cert FEB- 17 QC verified electrical resistance of coating is between 0.5 to 500 Megohms IAW CMM requ irements using 500V Megohm meter; with 100 Megohms being the ideal reading. Reading: megaohms Uncert Mechanic FEB- 17 Inspector FEB- 17 Apply Primer coating. Uncert Cert FEB- 17 Applied topcoat per CMM requirements QC to verified test coupon thickness (Max thickness 0.005" ")_0.85_MILS PT LOT# Uncert Mechanic FEB- 17 Inspector FEB- 17 Apply Top coat. Uncert Cert FEB- 17 Applied topcoat per CMM requirements QC to verified test coupon thickness (Max thickness 0.003"-0.005") Actual thickness: 0.004in. PT LOT# PT LOT# PT LOT# Uncert Polyurethane Boot is disbonded/torn. Enter By JAN-17 Mechanic FEB- 17 lnsoector FEB- 17 Removed and replaced Polyurethane Boot IAW Dash 8/0200 AMM TASK REC Uncert FEB- 17 Mechanic FEB- 17 lnsoector FEB- 17 Transmissivity test. Enter By FEB-17 Performed Transmissity test IAW RTCA/DO- 213A, Per Saint-Gobain CMM , Chapter 5, Para. 6. QC is to review and record results of test.

.components Customer RO No R044741 6 Average Reading: 89.37% Minimum Reading: 82.60% Trasmissivity Rating Class: B QC is to record results on inner surface of Radome.

5 .components Customer RO No R Average Reading: 89.37% Minimum Reading: 82.60% Trasmissivity Rating Class: B QC is to record results on inner surface of Radome. WORK ORDER Page 4 of 4 Issues and s Uncert Mechanic FEB- 17 Inspector FEB-17 Work Order Final lnsoection Cleaned per N/A Mechanic FEB-17 Inspected per Saint-Gobain CMM Mechanic JAN-17 Passed Final Test per RTCADO- 213A Mechanic FEB- 17 Validated that all replacement parts conform to the Manual Reference listed. Cal Tools ID TAC- 729 See attached Components Parts Usaae List for discrepancy and parts beina replaced. rrhis Unit Has Been Repaired Other Comments The work identified on this work order was accomplished in accordance with Title 14, Code of Federal Regulations, part 43 and in respect to that work, the items are approved for return to service. AD Requirement Verified By QC FEB-17 Mechanic FEB-1 7 Supervisor FEB- 17 l.nspector FEB- 17 CSD- E0l (04/08/2016) Rev 1 Work Order Final Inspection Signoff

6 PUL Page I of 1 Avia tion Technical Services, Inc. Components Parts Usage List Job N umber Start Over Item Cond. Description Qty UOM SN/Lot DIVERTER SET, DASH 8 RA DOME Deficiency/Identifier * Coad.Code Deficiency Fig./ltem 4426X-DI V NEW I EA -- SCR WRN GOBAIN CMM FILM ADHESIVE,36 IN X 50 VOS/ROLL AFl63-2K.060 NEW 3 SQF SCR WRN GOBAIN CMM AN NEW GROMMET, DRAINAGE 8 EA SCR WRN AGOP- 11- AN960C4 NEW WASHER 5 EA -- SCR WRN GOBA IN CMM NEW WASHER 5 EA -- SCR WRN GOBAINCMM BMS N NEW PR.E-PREG 24 YD SCR WRN GOBAIN CMM MS20426AD4-5 NEW RJ VET 5 EA -- SCR WRN GOBAINCMM SEAL (BULK) ONE EA - SAlNT- N NEW 72 EA SCR WRN GOBAINCMM ONE INCH PM-75 NEW BOOT, RADOME (DASH 8/Q I 00/Q200/Q300) I EA Deficiency Code Description Condition Code Description WRN Worn SCR Scrap Part * Standard replacement and consumable items may not be identified with a deficiency id entifier. al/repo1ts/partsusagelist.aspx 2/23/2017

7 Texas Air Composites TRANSMISSION EFFICIENCY TEST Trinity Blvd. RADOME ELECTRICAL TEST CONDUCTED IN ACCORDANCE WITH THE METHODS OF RTCA /D0-213A Fort Worth, TX FAA# T42R821Y Reoort #: CUSTOMER: Texas /ijk Comoosites MODEL: DASH 8 P/N: 4426X2-11 SIN : 221 TEST DATE : 02/23/2017 FREQ. Mhz: 9345 Elev. RAOOME Top Port AZIMUTH RAOOME Top Starboard DEG Ava RADOME Bottom Port RADOME Bottom Strbrd Avg I I Radome Condition Antenna TypeofTest RTCA/ Classlflcatlons TESTED AND ACCEPTED BY: J. NEAL d --/} /J /U Signature RTCAID0-213A Classification B /./ H11'1,f Bareshell D 12" D Incoming D Average Minimum Prime D 14" 0 In Process D A 90% 85% Painted 0 18" D Outgoing 0 B 87% 82% No Diverters D 24" D C 84% 78% MINIMUM READING: % Diverters 0 30" D D 80% 75% AVERAGE: % No Boot D E 70% 55% Boot 0

COMPOSITE INLET COWLING, RETROFIT OF. HELICOPTERS AFFECTED: Serial numbers through 45790, through and through

TECHNICAL BULLETIN 206L-18-255 28 June 2018 MODEL AFFECTED: 206L-1, 206L-3, and 206L-4 SUBJECT: COMPOSITE INLET COWLING, RETROFIT OF HELICOPTERS AFFECTED: Serial numbers 45154 through 45790, 51001 through