RAIN GUTTER, INTRODUCTION OF. HELICOPTERS AFFECTED: Serial numbers through

Transcription

1 MODEL AFFECTED: 505 TECHNICAL BULLETIN PSL March 2018 SUBJECT: RAIN GUTTER, INTRODUCTION OF HELICOPTERS AFFECTED: Serial numbers through [Serial number and subsequent will have the intent of this bulletin accomplished prior to delivery.] COMPLIANCE: At customer s option. DESCRIPTION: Bell Helicopter has introduced a rain gutter to the right side of the airframe to provide additional water protection. Applicability of this bulletin to any spare part shall be determined prior to its installation on an affected helicopter. 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: MANPOWER: Bell Product Support Engineering - Light Helicopters Tel: / / pselight@bellflight.com Approximately 4 man-hours are required to complete this bulletin. This estimate is based on hands-on time and may vary with personnel and facilities available. Page 1 of 7

2 WARRANTY: Owners / Operators of Bell Helicopters who comply with the instructions in this Bulletin will be eligible to receive KIT CT as applicable, listed in the bulletin. Bell Helicopter has recently introduced enhancements to the VISTA Portal which allocates specific warranty entitlement for an aircraft by serial number. The Product Service Letter (PSL) number which will be listed below the bulletin number on the introduction page is going to be a required field when submitting a claim for replacement parts, labor, and/or freight. If you receive an ASB or TB that does not have a PSL number, then there is no warranty entitlement for that bulletin. Labor entitlement: Yes $340.00USD To receive parts, labor, under warranty: Comply with the instructions contained in this Bulletin no later than the applicable date in the compliance section. If there is a PSL number identified in the bulletin you will be required to enter this PSL number which will validate warranty entitlement for the selected aircraft. Please ensure that you use the Bulletin tab on the warranty section in VISTA to file your claim. NOTE: Customers who fail to comply with the instructions in this Bulletin before the 31 st March 2019 will not be eligible for the special warranty listed above. 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. Order kit CT that consists of the following parts. Part Number Nomenclature Qty (Note) SLS Rain Gutter, RHS Blind Fastener 23 (1) NAS1149CN816R Washer 2 NOTE 1: Fastener lengths as provided in the CT kit are nominal values. Confirm the appropriate length at installation as requirements could vary from one helicopter to another. Page 2 of 7

3 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. Part Number Nomenclature Qty (Note) Reference * Sealant 2.5 OZ (1) C Primer 1 OZ (1) C Aliphatic Naphtha 1 GAL (1) C-305 * C-XXX numbers refer to the consumables list in the BHT-ALL-SPM, Standard Practices Manual NOTE 1: Quantity indicated is the format that the product is delivered in. Actual quantity required to accomplish the instructions in this bulletin may be less than what has been delivered. SPECIAL TOOLS: None required. WEIGHT AND BALANCE: Negligible ELECTRICAL LOAD DATA: Not affected. REFERENCES: BHT-505-IPC, Illustrated Parts Catalogue BHT-505-MM, Maintenance Manual BHT- ALL-SRM, Structural Repair Manual BHT-ALL-SPM, Standard Practice Manual IL GEN-04-96, General Information Letter PUBLICATIONS AFFECTED: BHT-505-IPB Illustrated Parts Breakdown, Chapter 53. ACCOMPLISHMENT INSTRUCTIONS: 1. Prepare the helicopter for maintenance. 2. Remove upper right protective trim located above the right passenger seat. Page 3 of 7

4 3. On the upper right sidebody (1, Figure 1), remove the twenty-three highlighted fasteners (2). 4. Inspect the condition of the fastener holes. a. If the fastener holes are damaged, refer to the BHT-ALL-SRM Chapter 3, paragraph Riveted Structures for repairs. b. If the fastener holes exceed the limits of the BHT-ALL-SRM, submit the details to Product Support Engineering at Refer to the General Information Letter IL GEN for the procedures on submitting a structural repair request. 5. Locate the rain gutter (2, Figure 2) in position on the right sidebody (1), and align the pilot holes. CAUTION The use of a drill stop is recommended to prevent damage to the longeron (4). 6. Enlarge the twenty-three pilot holes on the rain gutter (2) to to inch (4.17 to 4.24 mm) with a number 19 drill bit. 7. Remove the rain gutter (2) and deburr all the fastener holes. 8. If holes indicated in NOTE 1 (Figure 2) do not align, it is permissible to elongate the holes to remove the noted misalignment as follows: a. After locating and drilling the indicated holes from the right sidebody (1) into the rain gutter (2) it is acceptable to have misaligned holes in the rain gutter (2). If there is a misalignment of the holes (center to center) in the rain gutter (2), proceed as follows: (1) If the misalignment is less than inch (0.762 mm) fill the hole in the rain gutter (2) with sealant (C-251) and install fastener (3) wet with sealant (C- 251). (2) If the misalignment is between to inch (0.762 to mm) slot or elongate hole in the rain gutter (2), and add a washer (NAS1149CN816R) under the fastener (3) head prior to the installation. Fasteners (3) shall be installed wet with sealant (C-251). Overcoat the washer (NAS1149CN816R) and fastener (3) head with sealant (C-251). (3) If the misalignment exceeds inch (3.302 mm), contact Product Support Engineering at pselight@belllfight.com NOTE 1 (Figure 2). 9. Clean all components with Aliphatic Naphtha (C-305). Page 4 of 7

5 10. Apply sealant (C-251) to the faying surface of the rain gutter (2). 11. Locate the rain gutter (2) in position and wet install fasteners (3) with sealant (C- 251). 12. Apply a bead of sealant (C-251) to the contour of the rain gutter (2). 13. Apply wet, unreduced primer (C-204) to the head portion of the fasteners (3, Figure 2, Section A-A). 14. Refinish external paint as required (BHT-ALL-SPM). 15. Re-install the upper right protective trim located above the passenger seat. 16. Make an entry in the helicopter logbook and historical service records indicating compliance with this Technical Bulletin. Page 5 of 7

6 Figure 1 Fastener Removal Page 6 of 7

7 Figure 2 Rain Gutter Installation Page 7 of 7