MD Helicopters SB 369D-229R2: No revision named, text

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Page 1Open in PDF

MANDATORY MANDATORY MANDATORY

This document may be reproduced and distributed provided no fee is charged, the text is not modified, and this copyright notice is included.

* Supersedes Service Bulletins SB369H-263R1, SB369D-229R1, SB369E-129R1, SB369F-119R1, SB500N-066R1, and SB600N-080R1, dated 15 May 2020. Revised to delete compliance Method 2 and to add a reoccurring 300-hour borescope inspection of the pilot-to-copilot tail rotor torque tube.

* Helicopters that are in compliance with SB369H-263, SB369D-229, SB369E-129, SB369F-119, SB500N-066, and SB600N-080, dated 30 January 2020, must add a reoccurring 300-hour borescope inspection of the pilot-to-copilot tail rotor torque tube.

* Helicopters that are in compliance with SB369H-262, SB369D-228, SB369E-128, SB369F-118, SB500N-065, and SB600N-079 must add a 300-hour borescope inspection of the pilot-to-copilot tail rotor torque tube.

INSPECTION OF THE PILOT−TO−COPILOT

TAIL ROTOR TORQUE TUBE

1. PLANNING INFORMATION A. Aircraft Affected:

All 369H, 369HE, 369HS, and 369HM helicopters All 369D helicopters All 369E helicopters All 369F/FF helicopters All 500N helicopters All 600N helicopters B. Assembly/Components Affected By This Notice:

369H7531-9/-11/-13 Pilot-to-Copilot Tail Rotor Torque Tube C. Reason:

MDHI has received a 369H7531 pilot-to-copilot tail rotor torque tube with a significant spiral crack that seems to have originated from a hole where the tail rotor torque tube control fitting attaches to the torque tube. The crack caused reduced directional control pedal authority.

Failure to comply with this bulletin can cause a loss of anti-torque authority and directional control.

D. Description:

Procedures in this bulletin give owners and operators information to do a reoccurring inspection of the tail rotor torque tube for cracks and defects.

E. Time of Compliance:

For helicopters with 600 flight hours or less: the Accomplishment Instructions (ref.

Procedure 2.A.) in this bulletin must be completed during the next 100-hour inspection and every 300-hour inspection thereafter.

For helicopters with more than 600 flight hours: the Accomplishment Instructions (ref.

Procedure 2.A.) must be completed after a maximum of 5 hours of flight time. During these 5 flight hours, flights with increased, excessive, or rapid pedal movements must be limited.

Perform (ref. Procedure 2.A.) the 300-hour inspection thereafter.

SB369H-263R2* SB369D-229R2* SB369E-129R2* SB369F-119R2* SB500N-066R2* SB600N-080R2* DATE: 24 MARCH 2021 PAGE 1 OF 6

Page 2Open in PDF

MANDATORY MANDATORY MANDATORY

This document may be reproduced and distributed provided no fee is charged, the text is not modified, and this copyright notice is included.

F. FAA Approval:

The technical design aspects of this bulletin are FAA-approved.

G. Manpower:

Compliance with this bulletin will be approximately one (1) man-hour.

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 Pilot−to−Copilot Tail Rotor Torque Tube 369H7531−9/−11/−13 1 MDHI K. Warranty Policy:

Contact MDHI Warranty for prices, orders, availability, and service at:

https://www.mdhelicopters.com/contact.html.

Standard warranty policy applies.

Additional discrepancies found over and above the specified warranty coverage is the responsibility of the customer.

L. Disposition of Parts Removed:

Return the removed part to an authorized service center or MDHI with a completed Service Operation Report (SOR).

Fill out a Service and Operations Report (SOR) at https://www.mymd.aero/dashboard (select the SUPPORT dropdown menu, and then select New SOR).

M. Tooling:

Contact MDHI Spares Sales for parts availability at:

https://www.mdhelicopters.com/contact.html.

TOOLS AND EQUIPMENT Nomenclature (Item) Source (Manufacturer / Supplier) Borescope Commercially Available SB369H-263R2* SB369D-229R2* SB369E-129R2* SB369F-119R2* SB500N-066R2* SB600N-080R2* DATE: 24 MARCH 2021 PAGE 2 OF 6

Page 3Open in PDF

MANDATORY MANDATORY MANDATORY

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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:

Civil Aviation Authority of New Zealand Continuing Airworthiness Notice (CAN) 27-014 CSP-H-2 Basic Handbook of Maintenance Instructions CSP-H-7 Illustrated Parts Catalog CSP-HMI-2 Basic Handbook of Maintenance Instructions – Servicing and Maintenance CSP-IPC-4 Illustrated Parts Catalog

2. ACCOMPLISHMENT INSTRUCTIONS The left-hand command installation is shown. The procedures for the right-hand command are the same.

A. Borescope Inspection of the Pilot-to-Copilot Tail Rotor Torque Tube (Ref. Figure 1)

(1). Get access to the inspection area, as necessary.

(2). Examine the exterior of torque tube (1) with a bright light and a mirror for cracks, elongation, and other damage.

Remove panels and components as necessary to get access. (Ref. CSP-HMI-2)

(3). Examine the interior of torque tube (1) with a borescope for cracks, elongation, and other damage.

(a). Fully examine the area around the interface of torque tube (1) and bushing seg ments (4).

(b). Replace a torque tube with cracks, elongation, or damage. (Ref. CSP-HMI-2, 67-20-10, Removal / Installation, procedures 5. or 6.)

(4). Examine the tail rotor torque tube interior with a borescope at every 300-hour inspec tion.

B. Deleted SB369H-263R2* SB369D-229R2* SB369E-129R2* SB369F-119R2* SB500N-066R2* SB600N-080R2* DATE: 24 MARCH 2021 PAGE 3 OF 6 NOTE:

NOTE:

Page 4Open in PDF

MANDATORY MANDATORY MANDATORY

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SB2021-001

LEFT POSITION PEDAL

MOUNTING BRACKET

TORQUE TUBE

CONTROL FITTING

FLOOR-ROUTED

CONTROL ROD LEFT PEDAL

TAIL ROTOR

TORQUE TUBE 2

CRACK (EXAMPLE) 1 2 (REF) 1 (REF)

COPILOT CONTROL SHOWN 3 (REF) 1 3

SECTION B-B B B 4 4 Figure 1. Borescope Inspection of the Torque Tube SB369H-263R2* SB369D-229R2* SB369E-129R2* SB369F-119R2* SB500N-066R2* SB600N-080R2* DATE: 24 MARCH 2021 PAGE 4 OF 6

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MANDATORY MANDATORY MANDATORY

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Legend (Ref. Figure 1)

1. TORQUE TUBE, PILOT−TO−COPILOT TAIL ROTOR 3. NUT

2. CONTROL FITTING, TAIL ROTOR TORQUE TUBE 4. BUSHING SEGMENT C. Compliance Record

(1). Record compliance to this Service Bulletin in the Compliance Record Log (ref. CSP- RLB-L8) of the Rotorcraft Log Book CSP-RLB.

(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). Return the Pilot-to-Copilot Tail Rotor Torque Tube to MDHI. (Ref. Procedure 1.L., Disposition of Parts Removed)

(d). Mail a copy or e-mail a scanned copy of the Bulletin Completed Record to your MDHI Field Service Representative.

SB369H-263R2* SB369D-229R2* SB369E-129R2* SB369F-119R2* SB500N-066R2* SB600N-080R2* DATE: 24 MARCH 2021 PAGE 5 OF 6

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MANDATORY MANDATORY MANDATORY

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 Pilot−to−Copilot Tail Rotor Torque Tube 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:

Phone:

E−mail:

This bulletin is complete:

(Signature) (Print Name) (Title) Comments:

SB369H-263R2* SB369D-229R2* SB369E-129R2* SB369F-119R2* SB500N-066R2* SB600N-080R2* DATE: 24 MARCH 2021 PAGE 6 OF 6