Service Bulletin No. 058 Turbocharger - Back Plate Assembly Replacement at Overhaul

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1. Planning Information A. Effectivity (1) All turbocharger part numbers shown in Table 1 that have a P/N 406795-0058 back plate assembly installed are affected by this Service Bulletin. (2) Turbocharger serial numbers greater than H-RLR00052 (rebuilt) and H-RLL00074 (new) are not affected by this Service Bulletin. WARNING: DO NOT USE OBSOLETE OR OUTDATED INFORMATION. PERFORM ALL INSPECTIONS OR WORK IN ACCORDANCE WITH THE MOST RECENT REVISION OF THIS SERVICE BULLETIN (SB). INFORMATION CONTAINED IN THIS SB MAY BE SIGNIFICANTLY CHANGED FROM EARLIER REVISIONS. FAILURE TO COMPLY WITH THIS SB OR THE USE OF OBSOLETE INFORMATION MAY CREATE AN UNSAFE CONDITION THAT MAY RESULT IN DEATH, SERIOUS BODILY INJURY, AND/OR SUBSTANTIAL PROPERTY DAMAGE. REFER TO THE HET WEBSITE FOR THE MOST RECENT REVISION LEVEL OF THIS SB. Table 1 - Turbochargers Using P/N 406795-0058 back plate * * For aid in identifying engine or aircraft model, see Table 2 Reference Guide. NOTE: HET P/N uses -9xxx to denote a rebuilt version of the original part number. B. Concurrent Requirements (1) None C. Reason (1) Hartzell Engine Technologies has replaced P/N 406795-0058 back plate assembly with P/N 490006 back plate assembly. (2) The existing die cast back plate is being replaced by an improved geometrically redesigned back plate made from a more robust billet material. 2900 Selma Highway Montgomery, AL 36108 USA Tel: 334-386-5400 Fax: 334-386-5450 http://www.hartzell.aero Service Bulletin Service Bulletin No. 058 Turbocharger - Back Plate Assembly Replacement at Overhaul Rev. New: April 15/15 SB 058 © 2015 - Hartzell Engine Technologies. - All rights reserved Page 1 of 8 Model HET P/N Used By OE P/N TH08A60 409170-0001 Lycoming LW-12463 TH08A67 407810-0001 Continental (CMI) 635630 TH08A67 407810-0003 RAM 2060-1 TH08A68 409680-0011 Continental (CMI) 640327-11 TH08A69 465680-0001 Lycoming LW-13987 TH08A69 465680-0004 Cessna C295002-0202 TH08A69 465680-0005 Lycoming LW-18470 TH08A70 465930-0002 Continental (CMI) 641672-2 TH08A70 465930-0003 Continental (CMI) 641672-3 (3) P/N 406795-0058 back plate assembly is no longer available. (4) Regulatory action is not expected. D. Description (1) This Service Bulletin provides Instructions for Continued Airworthiness (ICA). (2) This Service Bulletin requires that all affected turbocharger part numbers replace P/N 406795-0058 back plate assembly with a P/N 490006 back plate assembly at next overhaul per section 1.E(1) Compliance. (3) This Service Bulletin is issued prior to the revision of HET P/N 400600-0000 Turbocharger Maintenance & Overhaul Manual which incorporates the back plate assembly overhaul requirement. E. Compliance (1) At next turbocharger overhaul, 2000 hours turbocharger time in service, or twelve (12) calendar years, which ever occurs first, replace P/N 406795-0058 back plate assembly with a P/N 490006 back plate assembly. (2) Compliance with the Accomplishment Instructions is the terminating action for this Service Bulletin. F. Approval (1) FAA acceptance has been obtained on technical data in this publication that affects type design. G. Manpower (1) No additional labor is required when the back plate assembly is replaced at overhaul. H. References WARNING: DO NOT USE OBSOLETE OR OUTDATED INFORMATION. PERFORM ALL INSPECTIONS OR WORK IN ACCORDANCE WITH THE MOST RECENT REVISION OF A DOCUMENT. (1) Turbocharger overhaul manual, HET P/N 400600-0000 Rev. B or later. I. Other Publications Affected (1) HET P/N 400600-0000 Turbocharger Maintenance & Overhaul Manual. J. Weight and Balance (1) Not affected Service Bulletin Service Bulletin No. 058 Turbocharger - Back Plate Assembly Replacement at Overhaul SB 058 Rev. New: April 15/15 Page 2 of 8 © 2015 - Hartzell Engine Technologies. - All rights reserved 2. Material Information A. One (1) each, back plate assembly HET P/N 490006 per turbocharger assembly. Note: Miscellaneous and other HET parts will be required to complete a turbocharger overhaul. 3. Accomplishment Instructions WARNING 1: THIS PROCEDURE MUST BE PERFORMED BY COMPETENT AND QUALIFIED PERSONNEL WHO ARE FAMILIAR WITH ENGINE AND AIRFRAME MAINTENANCE THAT IS SPECIFIC TO THE TURBOCHARGING SYSTEM. FAILURE TO DO SO MAY RESULT IN ECONOMIC LOSS, EQUIPMENT DAMAGE, AND/OR PHYSICAL INJURY. WARNING 2: DO NOT USE OBSOLETE OR OUTDATED INFORMATION. PERFORM ALL INSPECTIONS OR WORK IN ACCORDANCE WITH THE MOST RECENT REVISION OF THIS SERVICE BULLETIN (SB) AND THE APPLICABLE AIRCRAFT, ENGINE AND/ OR HET P/N 400600-0000 MAINTENANCE MANUAL. INFORMATION CONTAINED IN THESE MANUALS OR THIS SB MAY BE SIGNIFICANTLY CHANGED FROM EARLIER REVISIONS. FAILURE TO COMPLY WITH THIS SB OR THE USE OF OBSOLETE INFORMATION MAY CREATE AN UNSAFE CONDITION THAT MAY RESULT IN DEATH, SERIOUS BODILY INJURY, AND SUBSTANTIAL PROPERTY DAMAGE. REFER TO THE APPLICABLE AIRCRAFT, ENGINE, MAINTENANCE MANUAL INDEX AND/OR THE APPLICABLE WEBSITE FOR THE MOST RECENT REVISION LEVEL OF THESE PUBLICATIONS. A. Inspection (1) Determine if a P/N 406795-0058 back plate assembly is installed in an affected turbocharger. (Refer to Table 1) a. At overhaul, identify P/N 406795-0058 back plate assembly by visual inspection (no disassembly required). Refer to Figure 1. (i) If this back plate assembly is installed, proceed to section 3.B(1) Corrective Action. b. If the turbocharger has been overhauled or repaired previously, a P/N 490006 back plate assembly may already be installed. This may be confirmed by visual inspection. (Refer to Figure 2.) c. Installation of P/N 490006 back plate assembly is the terminating action for this service bulletin. Proceed to section 3.D Maintenance Record. Service Bulletin Service Bulletin No. 058 Turbocharger - Back Plate Assembly Replacement at Overhaul Rev. New: April 15/15 SB 058 © 2015 - Hartzell Engine Technologies. - All rights reserved Page 3 of 8 B. Corrective Action: