SAIB CE-03-34 —

1 SPECIAL AIRWORTHINESS INFORMATION BULLETIN Aircraft Certification Service Washington, DC U.S. Department of Transportation Federal Aviation Administration No. CE-03-34 April 9, 2003 We post SAIBs on the internet at "av-info.faa.gov" This is information only. Recommendations are not mandatory. Introduction This Special Airworthiness Information Bulletin (SAIB) alerts you, a registered owner or operator of Mitsubishi Heavy Industries (MHI) manufactured aircraft MU-2B/-10/-15/-20/-25/-26: (S/N 008 through 347, except S/N 313, 321), and MU-2B-30/-35/-36: (S/N 501 through 696 except 652, 661) of the release of MHIA Service Bulletin Number 239, dated December 26, 2002; and MU-2B-25/-26/-26A/ -40: (S/N 313SA, 321SA, 348SA through 459SA) and MU-2B-35/-36/-36A/-60: (S/N 652SA, 661SA, 697SA through 1569SA) of the release of MHIA Service Bulletin Number 101/36-001, dated February 7, 2003. These Service Bulletins address the inspection, repair, and replacement of pneumatic lines. Background MHI issued Service Bulletins 101/36-001 and 239 because of reports of local pressure leakage in pneumatic lines under the line supporting clamps on the aluminum tube assemblies. This condition has been attributed to corrosion. To preclude this pressure leakage, the Service Bulletins contain instructions for a one-time inspection for corrosion, and replacement of affected parts if necessary. Recommendation The Service Bulletins identified in this document are not considered appropriate for AD action at this time. However, we strongly recommend all owners and operators of the Mitsubishi MU-2B series aircraft listed above review their compliance with the following applicable Service Bulletins: Mitsubishi Airplane Series Service Bulletin Number/Date Model/Serial Number Title 239 dated December 26, 2002 MU-2B/-10/-15/-20/-25/-26: S/N 008 thru 347 (except S/N 313, 321) MU-2B-30/-35/-36: S/N 501 thru 696 (except 652, 661) Pneumatic Line Inspection and Modification 101/36-001 dated February 7, 2003 MU-2B-25/-26/-26A/-40: S/N 313SA, 321SA, 348SA, thru 459SA MU-2B-35/-36/-36A/-60: S/N 652SA, 661SA, 697SA thru 1569SA Pneumatic Line Inspection and Modification

2 This Service Bulletin Can Be Obtained From Mitsubishi Heavy Industries America, Inc., Aircraft Product Support Division, 4951 Airport Parkway, Ste. 800, Addison, Texas 75001; phone (972) 934-5480; fax: (972) 934-5488. For Further Information, Contact For airplanes covered under Service Bulletin 239: Mr. Carl Fountain, Aerospace Engineer, Los Angeles Aircraft Certification Office, FAA, 3960 Paramount Boulevard, Lakewood, California, 90712; phone: (562) 627-5222; fax: (562) 627-5210; email: [email protected] For airplanes covered under Service Bulletin 101/36-001: Mr. Werner Koch, Aerospace Engineer, FAA, Airplane Certification Office, ASW-150, 2601 Meacham Blvd., Fort Worth, Texas 76193-0150; phone: (817) 222-5133; fax: (817) 222-5133; email: [email protected]