MD HELICOPTERS 600N Service Bulletins

SB369H-259 SB369D-223 SB369E-122 SB369F-110 SB500N-060 SB600N-073 DATE: 19 APRIL 2019 PAGE 2 OF 8 MANDATORY MANDATORY MANDATORY MANDATORY MANDATORY MANDATORY SERVICE BULLETIN Copyright 1999-2018 by MD Helicopters Inc. This document may be reproduced and distributed provided no fee is charged, the text is not modified, and this copyright notice is included. D. Description: Procedures in this bulletin give owners and operators information to find the serial numbers that have been repaired and will have to be replaced by a qualified MDHI team. E. Time of Compliance: The instructions in this bulletin must be completed within seven (7) days after receipt of this bulletin. Bolts can be replaced at the next overhaul or service, or no later than the next twelve months after you get this bulletin. MDHI will tell the customer when the replacement bolts are available. F. FAA Approval: The technical design aspects of this bulletin are FAA approved. G. Manpower: Compliance with this bulletin will be approximately 0.25 man-hours. H. Interchangeability: None. I. Points of Contact: For further assistance, contact MDHI Field Service at: https://www.mdhelicopters.com/contact.html J. Material/Part Availability: Contact MDHI Spare Sales for parts availability at: https://www.mdhelicopters.com/contact.html REPLACEMENT PARTS/SUPPLIES Nomenclature Part No. Qty. Source Main Rotor Lead−Lag Bolt 369D21220 1 to 6 MDHI K. Warranty Policy: Contact MDHI Warranty for prices, orders, availability, and service at: https://www.mdhelicopters.com/contact.html or https://www.mymd.aero/dashboard or https://www.mymd.aero/. The MDHI Warranty Department will give the lead-lag bolts at no cost to the operator. MDHI will also send a field maintenance team to replace the bolts. Standard warranty policy applies. The hours in Manpower (ref. Paragraph 1.G.) are an estimate, and are not reimbursable, unless specified in the Warranty Policy. Additional discrepancies found over and above the specified warranty coverage is the responsibility of the customer. L. Disposition of Parts Removed: Return to MDHI with a completed Service Operation Report (SOR). SB369H-259 SB369D-223 SB369E-122 SB369F-110 SB500N-060 SB600N-073 DATE: 19 APRIL 2019 PAGE 3 OF 8 MANDATORY MANDATORY MANDATORY MANDATORY MANDATORY MANDATORY SERVICE BULLETIN Copyright 1999-2018 by MD Helicopters Inc. This document may be reproduced and distributed provided no fee is charged, the text is not modified, and this copyright notice is included. M. Tooling: N/A N. Weight and Balance: N/A O. Electrical Load Data: N/A P. Other Publications Affected: N/A Q. Reference Publications: Refer to the latest revision of these publications for procedures and additional information: CSP-RLB Rotorcraft Log Book CSP-H-4 Periodic Inspections, Overhaul and Retirement Schedule and Weight and Balance Procedure (Basic HMI Appendix B) CSP-H-7 Illustrated Parts Catalog CSP-HMI-2 Basic Handbook of Maintenance Instructions – Servicing and Maintenance CSP-IPC-4 Illustrated Parts Catalog SB369H-259 SB369D-223 SB369E-122 SB369F-110 SB500N-060 SB600N-073 DATE: 19 APRIL 2019 PAGE 4 OF 8 MANDATORY MANDATORY MANDATORY MANDATORY MANDATORY MANDATORY SERVICE BULLETIN Copyright 1999-2018 by MD Helicopters Inc. This document may be reproduced and distributed provided no fee is charged, the text is not modified, and this copyright notice is included. 2. ACCOMPLISHMENT INSTRUCTIONS (Ref. Figure 1) A. Find the Serial Number of the Main Rotor Hub Lead-Lag Bolt (1). Examine the Component Maintenance records for the serial number of each of the four, five, or six lead-lag bolts installed on a helicopter. (2). Examine the serial number on lead-lag bolts in storage. (3). If the Component Maintenance records are incomplete, look at the head of the lead-lag bolt to find the serial number. Make sure to keep each balance weight stackup together and to record the location of each stackup during removal. Incorrect installation can cause an imbalance in the main rotor. (a). If necessary, remove screws (6), washers (7), nuts (9), and washers (10, 11) (ref. Figure 1). (b). Record or make a note of the position each stackup is removed from. (c). After you look for the serial number, install each stackup to the correct location. (4). Do a check of the lead-lag bolt serial numbers with the serial numbers shown in Paragraph 1.B. (a). Tell MDHI if there is a lead-lag bolt or bolts with the Paragraph 1.B. serial numbers installed on a helicopter so MDHI can schedule a time to replace the lead-lag bolts. (5). If the time on the bolt is known, include the hours on the Bulletin Completed Record or in your MyMD.Aero account, or in a new Service Operation Report (SOR). B. Compliance Record (1). Record compliance to this Service Bulletin in the Compliance Record Log (ref. CSP- RLB-L8) of CSP-RLB Rotorcraft Log Book. (2). Show compliance with this Service Bulletin by one of these methods: (a). Complete a Service Operation Report (SOR) at https://www.mymd.aero/dashboard. (b). Put an entry in your https://www.mymd.aero/ account. (c). Mail a copy or e-mail a scanned copy of the Bulletin Completed Record to your MDHI Field Service Representative. SB369H-259 SB369D-223 SB369E-122 SB369F-110 SB500N-060 SB600N-073 DATE: 19 APRIL 2019 PAGE 5 OF 8 CAUTION MANDATORY MANDATORY MANDATORY MANDATORY MANDATORY MANDATORY SERVICE BULLETIN Copyright 1999-2018 by MD Helicopters Inc. This document may be reproduced and distributed provided no fee is charged, the text is not modified, and this copyright notice is included. SB88-645 MAIN ROTOR HUB PITCH HOUSING ASSEMBLY 9 10 11 7 2 8 6 4 5 1 3 5 PLACES Figure 1. Main Rotor Hub Lead-Lag Bolt Location and Installation SB369H-259 SB369D-223 SB369E-122 SB369F-110 SB500N-060 SB600N-073 DATE: 19 APRIL 2019 PAGE 6 OF 8 MANDATORY MANDATORY MANDATORY MANDATORY MANDATORY MANDATORY SERVICE BULLETIN Copyright 1999-2018 by MD Helicopters Inc. This document may be reproduced and distributed provided no fee is charged, the text is not modified, and this copyright notice is included. Legend (Ref. Figure 1) 1. LEAD−LAG BOLT (REF. IPC, 62−20−00, FIGURE 1) 7. WASHER 2. PITCH HOUSING 8. LINK 3. HUB STRAP 9. NUT 4. NUT 10. WASHER 5. COTTER PIN 11. WASHER 6. SCREW SB369H-259 SB369D-223 SB369E-122 SB369F-110 SB500N-060 SB600N-073 DATE: 19 APRIL 2019 PAGE 7 OF 8 MANDATORY MANDATORY MANDATORY MANDATORY MANDATORY MANDATORY SERVICE BULLETIN Copyright 1999-2018 by MD Helicopters Inc. This document may be reproduced and distributed provided no fee is charged, the text is not modified, and this copyright notice is included. Bulletin Completed Record Inspection of the Main Rotor Hub Lead−Lag Bolt, PN 369D21220 MD Helicopters, Inc. Field Service 4555 East McDowell Road Mesa, AZ 85215−9734 Phone: 480−346−6300 or 1−480−346−6300 (International) Website: https://www.mdhelicopters.com/contact.html Or contact your Field Service Representative. Owner/− Operator: Helicopter Serial No: Address: Helicopter Total Time: Date Complete: Location: Serial No. Bolt 1 _________ Bolt 2 _________ Phone: Bolt 3 _________ Bolt 4 _________ E−mail: Bolt 5 _________ Bolt 6 _________ This bulletin is complete: (Signature) (Print Name) (Title) Comments: Bolt 1: Bolt 2: Bolt 3: Bolt 4: Bolt 5: Bolt 6: SB369H-259 SB369D-223 SB369E-122 SB369F-110 SB500N-060 SB600N-073 DATE: 19 APRIL 2019 PAGE 8 OF 8