# 328 Support Services Service Bulletin 328-55-493 Copy: No revision named ("U.S. DOT/FAA - Service Bulletin - 328-55-493R0"), 9 pages: PDF https://openairdocs.org/files/sha256/89/f7/89f751d38e43bd850b867ea748ebf39d7c4273c7d90e1cb94473285700a316e2; text https://openairdocs.org/service-documents/dornier/sb-328-55-493/file/89f751d38e43.md. Rights: © 328 Support Services. Filed by the FAA in regulations.gov docket FAA-2011-0308; AD 2011-15-07 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. ## Details - Manufacturer: [Dornier](https://openairdocs.org/service-documents/dornier.md) (issued as 328 Support Services) - Type: Service bulletin (Service Bulletin) - Number: 328-55-493 - Page: https://openairdocs.org/service-documents/dornier/sb-328-55-493 ## ADs that cite it (1) (OpenAirDocs) Newest first, with the revision each names, as OpenAirDocs read it from the AD's text. - [AD 2011-15-07](https://openairdocs.org/ad/2011-15-07.md), effective Aug 22, 2011: No revision named Also cited in [1 proposed AD](https://openairdocs.org/service-documents/dornier/sb-328-55-493/proposed.md). ## Text (9 pages) Rights: © 328 Support Services. Filed by the FAA in regulations.gov docket FAA-2011-0308; AD 2011-15-07 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. This text is OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N. ### Page 1 (OCR) 328 SB Service Bulletin Dornier 328 328 Support Services SUPPORT SERVICES Customer Services Global Support Center P. O. Box 1252 Phone +49 (0) 8153 88111-6666 D-82231 Wessling Telefax +49 (0) 8153 88111-6565 Fed. Rep. of Germany e-mail gsc.op@328support.de SB-328-55-493 Title: Stabilizers - Inspection of Rudder Tab Fixation Brackets. 1. PLANNING INFORMATION Effectivity Dornier 328-100. EASA Type Certificate Datasheet: TCDS A.096. Serial-No's: All aircraft. Reason During maintenance it has been detected, that at the installation of the fixation brackets for rudder spring tabs and trim tabs incorrect assembly concerning the orientation might be possible. Rudder tabs brackets contain helicoil inserts located on the screw installation side. In case the orientation of the bracket is reversed or flipped-over, the screws might not reach into the helicoil thread deep enough. Description Inspection of the rudder spring-tab and rudder trim-tab fixation brackets for correct orientation and helicoil installation. Compliance Mhis Service Bulletin must be performed not later than the next A-Check, equivalent or higher after receipt. Approval The technical content of this Service Bulletin is approved under authority of EASA approved design organization EASA.21J.033. GOT Design Organisation GmbH This inspection is covered by type design. EASA approved Design Organisation EASA. 21/.023 1)(7.04.18 328 Support Services GmbH is TC-Holder of Dornier 328 Jet and Prop and authorized to provide necessary approved data. Any Dornier 328 approved data will be established and verified by GCT Design Organisation as authorized and responsible Dornier 328 Design Organisation per EASA approval EASA 21J.033. For details in this matter please contact 328 Support Services GmbH or EASA authority. It is the operator's responsibility to comply with the relevant aviation regulations of the country in which the aircraft is registered. Model Dornier 328 Rev. No. No. SB-328-55-493 Rev. Date. Date of Issue Apr 21, 2010 Page of 8 ### Page 2 (OCR) Manpower nspection Functional checks: 2,0 Mhrs. 0,0 Mhrs. Total: 2,0 Mhrs. Material N/A Special Tools Magnifying Glass Marker with a thin tip Weight and Balance Not affected. Electrical Load Data Not affected. References SRM 51-44-20 Helical Coil Inserts - Installation and Removal AMM JIC 55-42-00 Rudder Trim Tab - Removal/Installation AMM JIC 55-43-00 Rudder Spring Tab - Removal/Installation Other Publications Affected Not affected. Reporting Compliance of this Service Bulletin must be reported to 328 Support Services GmbH Customer Services Department using the Compliance Report for Configuration Control. Page 2 of 8 SB-328-55-493 ### Page 3 (OCR) 328 SB Dornier 328 Service Bulletin 328 Support Services SUPPORT SERVICES Customer Services Global Support Center P. O. Box 1252 Phone +49 (0) 8153 88111-6666 D-82231 Wessling Telefax +49 (0) 8153 88111-6565 Fed. Rep. of Germany e-mail gsc.op@328support.de 2.ACCOMPLISHMENT INSTRUCTIONS CAUTION: Obey the Safety Precautions and the General Maintenance Practices according to the AMM JIC Chapter 00 A Preparation (1) Make the aircraft safe for maintenance according to AMM JIC 00-30-01. CAUTION: Put a warning notice in the flight compartment to tell persons not to operate the flight controls. B Inspection CAUTION: Obey the general safety precautions according to AMM JIC 00-30-27 when you work on the stabilizer. Obey the applicable safety precautions when you work on the adjustable platform. (1) Put an adjustable platform on the LH and RH side of the rudder. (2) Open the screws on rudder trim tab and spring tab fixation bracket as shown in Figure 1 and Figure 2. Refer to AMM JIC 55-42-00 and AMM JIC 55-43-00. CAUTION: Remove max. two screws per fixation and go on with item (3). Reinstall the screws after performed inspection and start again at item (2) for the next screws. Model Dornier 328 Rev. No. No. SB-328-55-493 Rev. Date. Date of Issue Apr 21, 2010 Page of ### Page 4 (OCR) (3) Mark the head of the screw with a thin line reaching onto the tab straightened to a suitable reference edge. Remove the screw slowly and count the turns until complete looseness. NOTE: The procedure to remove the four hexagon screws of the drive fitting needs to be adapted, as the tool covers the screw head while turning. Use a suitable tool like e.g. a cranked hexagon wrench key to count the turns, or mark the nut position compared to the drive fitting instead of the screw head. For more than and including four thread turns proceed according (a), but for less than four thread turns proceed with (b): (a) If all helicoil inserts are proper installed concerning their orientation and facing the fitting surface, proceed with para. "C". If helicoil inserts are found not to be installed properly, remove the affected rudder tab according to AMM JIC. Perform a detailed visual inspection using magnifying glass for proper installation of the helicoil insert, refer to Figure 3/4/5. In case of miss-orientation of the fitting the part is to be re-orientated according to AMM JIC 55-42-70 or AMM JIC 55-43-70. In case of proper orientated fitting, but miss-located helicoil a proper re- installation of the helicoil according to SRM 51-44-20 or the exchange of the fitting according to AMM JIC 55-42-70 or AMM JIC 55-43-70 is to be performed. NOTE: Any findings during the inspection need to get reported to 328 Support Services GmbH for investigation. Use the SPR-Form for detailed descriptions. C Close-up (1) Perform all necessary inspection/checks according the related AMM JIC 55-4X- XX after handling the Rudder Trim or Spring Tab. NOTE: Balancing of the control surfaces is not necessary after accomplishment of this Inspection SB. (2) Perform a foreign object inspection in modification area. (3) Return the aircraft to a serviceable condition. Page 4 of 8 SB-328-55-493 ### Page 5 (OCR) 328 Dornier 328 SB Service Bulletin 328 Support Services SUPPORT SERVICES Customer Services Global Support Center P. O. Box 1252 Phone +49 (0) 8153 88111-6666 D-82231 Wessling Telefax +49 (0) 8153 88111-6565 Fed. Rep. of Germany e-mail gsc.op@328support.de 3.MATERIAL INFORMATION Not necessary Model Dornier 328 Rev. No. No. SB-328-55-493 Rev. Date. Date of Issue Apr 21, 2010 Page 5 of ### Page 6 (OCR) Fig 1: Rudder - Trim Tab Screw Removal Page of SB-328-55-493 ### Page 7 (OCR) 328 SB Dornier 328 Service Bulletin 328 Support Services SUPPORT SERVICES Customer Services Global Support Center P. O. Box 1252 Phone +49 (0) 8153 88111-6666 D-82231 Wessling Telefax +49 (0) 8153 88111-6565 Fed. Rep. of Germany e-mail gsc.op@328support.de HELICOIL B Fig 2: Rudder - Spring Tab Screw Removal Model Dornier 328 Rev. No. No. SB-328-55-493 Rev. Date. Date of Issue Apr 21, 2010 Page 7 of ### Page 8 (OCR) ASYMMETRICAL HELICOIL A1-A1 DESIGN Fig 3: Rudder - Spring/Trim Tab Fitting #2 & #3 Fig 4: Rudder - Trim Tab Fitting #1 Fig 5: Rudder - Spring Tab Main Fitting #1 Page 8 of SB-328-55-493 ### Page 9 (OCR) 328 CR Compliance Report Dornier 328/328J 328 Support Services GmbH SUPPORT SERVICES Customer Services Global Support Center P. O. Box 1252 Phone: +49 (0) 8153 88111-6666 D-82231 Wessling Telefax: +49 (0) 8153 88111-6565 Fed. Rep. of Germany e-mail gsc.op@328support.de Please complete this Compliance Form for each aircraft only when it is applicable, and mail or fax to: Attention: Dept. C 328 Support Services GmbH Customer Services P.O.B. 1252 D-82231 Wessling Telefax +49 (0) 8153 88111-6565 From Company: AOT No.: Rev.: Title: ASB No.: Rev.: Title: SB No.: Rev.: Title: EO No.: Rev.: Title: Aircraft Serial Number: Operator: Total Flight Hours: Total Landings: Date of compliance: Comments: Date Authorized signature --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.