Mitsubishi MU-2B Service Publication

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MITSUBISHI HEAVY INDUSTRIES AMERICA INC. MITSUBISHI SERVICE PUBLICATIONS TRANSMITTAL The attached Mitsubishi MU-2B series Service Publication has been issued by Mitsubishi Heavy Industries, Ltd. in Japan, who is the type certificate holder of the MU-2 aircraft. It is the owner and/or operator’s responsibility to adhere to or comply with new information contained in the attached publication. SN 211 SN 160/32-020 Main Landing Gear Leg Fitting Visual Inspection NOTE THIS PUBLICATION IS PRINTED AND/OR DISTRIBUTED BY MITSUBISHI HEAVY INDUSTRIES AMERICA, INC., UNDER LICENSE FROM MITSUBISHI HEAVY INDUSTRIES LTD. FOR COMMENTS OR INQUIRIES REGARDING DISTRIBUTION OF THIS PUBLICATION OR RECEIPT OF ANY OF THE PUBLICATIONS LISTED HEREIN, PLEASE CONTACT: Mitsubishi Heavy Industries America, Inc. Aircraft Product Support Division 17304 Preston Road, Suite 1270 Dallas, Texas 75252 USA Email: mu-2support@mhia.com THIS PAGE INTENTIONALLY LEFT BLANK M U - 2 S E R V I C E N E W SMITSUBISHI HEAVY INDUSTRIES, LTD. NAGOYA AEROSPACE SYSTEMS WORKS 10, OYE-CHO, MINATO-KU, NAGOYA, JAPAN JCAB T.C. : No. 211 DATE: July 1, 2024 FAA T.C. : No. 160/32-020 SUBJECT: Main Landing Gear Leg Fitting Visual Inspection MODELS AFFECTED: All MU-2B Long Body Aircraft Mitsubishi Heavy Industries, Ltd. (MHI) has received in-field failure reports of the long body main landing gear leg fittings. MHI is currently preparing instructions for a periodic non-destructive ultrasonic inspection procedure for the main landing gear leg fittings, P/N 030A-32315-1/-2. While a non-destructive ultrasonic inspection is being prepared, MHI requests that each long body airplane owner and/or operator visually inspect for any cracks in or around the lug portion of the fittings before the next flight and during the next periodic inspection. Areas to be inspected are indicated in Figure 1 below. Also, it is important to apply lubrication to the fittings through grease ports in accordance with instructions in the applicable Maintenance Manuals. Figure 1: LH MLG Leg Fitting (P/N 030A-32315-1) MHI expects that the ultrasonic inspection will be similar to the existing ultrasonic inspection procedure used to inspect the main landing gear oleo attach fittings at the 600-hour or 3-year periodic inspection. An inspection kit will be provided by MHI to Mitsubishi MU-2 Authorized Service Centers and other maintenance facilities. Please refer to MHI Service News No. 176, No. 128/32-013, dated July 18, 2013. Inspection Area MU-2 Service News JCAB T.C.: No.211 DATE: July 1, 2024 FAA T.C.: No.160/32-020 Page 2 of 2 For questions or additional information, please contact MHIA at the following contact information: Mitsubishi Heavy Industries America, Inc. Aircraft Product Support Division 17304 Preston Road, Suite 1270, Dallas, Texas 75252 Email: mu-2support@mhia.com | Website: www.mu-2aircraft.com Attachment: 1. MHI Service News No. 176, No. 128/32-013, dated July 18, 2013. Page 1 of 1 M U - 2 S E R V I C E N E W S MITSUBISHI HEAVY INDUSTRIES, LTD. NAGOYA AEROSPACE SYSTEMS WORKS 10, OYE-CHO, MINATO-KU, NAGOYA, JAPAN JCAB T.C. : No.176 DATE: July 18, 2013 FAA T.C. : No. 128/32-013 SUBJECT: Main Landing Gear Oleo Attach Fitting – Inspection of MODELS AFFECTED: All A2PC Certified Long Body Airplanes All A10SW Certified Long Body Airplanes Three failures of the long body main landing gear oleo strut attach fitting have been reported in the field as the result of improper lubrication and/or hard landings. Mitsubishi Heavy Industries, Ltd. (MHI) and Mitsubishi Heavy Industries America, Inc. (MHIA) have issued instructions for a periodic non-destructive ultrasonic inspection procedure for the main landing gear oleo strut attach fittings, P/N 030A-32314-1/-2. This ultrasonic inspection procedure will require the owner/operators to have the strut attach fittings inspected every 600 hours. Utilizing the ultrasonic inspection procedure, this can be accomplished without disassembly of the main landing gear strut assembly. Main landing gear forward doors may be opened for easier access and inspection. This ultrasonic inspection procedure, repetitive at 600 hrs intervals, is added to applicable Maintenance Manuals (MM) and Maintenance Requirement Manual (MRM). The ultrasonic inspection requirement is also added to Hard or Overweight Landing inspection requirements in MRM. It is strongly recommended that this ultrasonic inspection be conducted during the next periodic inspection regardless of the inspection intervals. MHIA has prepared an inspection tool kit, P/N 035A-900020-101, to facilitate this inspection. Authorized MU-2 Service Centers will have the inspection tool kit on site to provide the ultrasonic inspection during the next periodic maintenance. MHIA will maintain one inspection kit in house to be loaned to the field as required for the inspection. For preventative maintenance, MHI recommends regularly applying grease to the Pin Assembly attached to the main landing gear oleo attach fitting through grease ports located on each end of the pin. For questions or additional information, contact MHIA Engineering at (972) 934-5480 Ext 207. THIS PAGE INTENTIONALLY LEFT BLANK