# SAIB CE-05-85: - Type: Special airworthiness information bulletin (advisory, not mandatory) - Status: Current - Revision: 0 - Issued: September 20, 2005 - Products: DG Flugzeugbau DG-100, DG-200, DG-300, DG-400, DG-500, DG-500M, DG-600 and DG-600M - Product type: Aircraft, Glider - PDF: https://openairdocs.org/files/sha256/87/c2/87c26a4f1e920542601cc1429a777e079dcc5cdcd65b2f1b7c81d25587a2406f - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/42E727B59FAC47348625721F0052EC2E.0001 - Page: https://openairdocs.org/saib/CE-05-85 ## Text Some pages are OCR from the scanned FAA bulletin. OCR can misread letters and numbers. **SPECIAL AIRWORTHINESS** **INFORMATION BULLETIN** Aircraft Certification Service Washington, DC U.S. Department of Transportation Federal Aviation Administration CE-05-85 September 20, 2005 http://www.faa.gov/aircraft/safety/alerts/SAIB This is information only. Recommendations aren’t mandatory. Introduction This Special Airworthiness Information Bulletin advises you, owners and operators of DG Flugzeugbau (Glaser-Dirks) Models DG-100, DG-200, DG-300, DG-400: all serial numbers (S/Ns); DG-500 and DG-500M: all S/Ns up to 5E23; DG-600, and DG-600M: all S/Ns; to implement DG Technical Notes: 301/23 Issue 2, 323/14 Issue 2, 348/18 Issue 2, 359/21 Issue 2, 370/9 Issue 2, 826/44 Issue 2, 843/21 Issue 2, and 866/10 Issue 2 (attached). These Technical Notes require an inspection of the outer bearing ring in the rudder mounting assembly and modification or exchange of the rudder bearing mounting assembly. Background On a DG-100, the universal bearing of the rudder lower mounting bracket slipped out of the bearing support causing the rudder to fall out. This condition may exist on the abovementioned models. Recommendation We recommend that you do the actions of the stated Technical Notes upon receipt of this bulletin. We recommend that a certified mechanic check the position of the outer bearing ring daily during pre-flight inspection until the modification or exchange is done. For Further Information Contact Gregory Davison, Glider Program Manager, FAA Small Airplane Directorate, Room 301, 901 Locust Street, Kansas City, Missouri 64106; phone: (816) 329-4130; fax: (816) 329- 4090; email: gregory.davison@faa.gov DG Flugzeugbau U.S. Representative, Western: Pacific Aerosport, LLC, 17705 49th Place N.E., Arlington, WA 98223 Tel: (360) 474-9394 Fax: (360) 474-1034 Email: Chris@pacificaerosport.com http://www.pacificaerosport.com Eastern: Seminole Lake Gliderport P.O. Box 135516 4024 Soaring Lane Clermont, Florida 34713 Tel: (352) 394-5450 Fax: (352) 394-5450 Email: soarfl@aol.com DG Flugzeugbau GmbH Otto Lilienthal Weg 2 D-76646 Bruchsal Tel: +49 7251 3020-100 Fax: +49 7251 3020-200 Email: sales@dg-flugzeugbau.de 76646 Brachsal DG Flugzeugbau GmbH Technical Note page 1 from 2 No. 301/23 issue 2 No. 348/18 issue 2 323/14 issue 2 843/21 issue 2 359/21 issue 2 370/9 issue 2 826/44 issue 2 866/10 issue 2 Subject : Lower mounting of the rudder Effectivity : DG-100, DG-200, DG-300, DG-400, all models and all ser.no.'s DG-500, DG-500M all models up to SE23 DG-600, DG-600M all models and all ser.no.'s. Accomplishment : Instruction 1 with every daily inspection until instruction 3 has been executed. Instruction 2: if necessary Instruction 3: up to Dec. 31.2004 Reason : On a DG-100 the universal bearing of the lower rudder mounting slipped out of the bearing support and the rudder fell out. As the design is similar on all DG-types this kind of failure may occur on all DG's. On later models this connection was secured by an extra securing washer. Such a washer must be retrofitted to all DG-types with this TN. Instructions 1. Check if the outer bearing ring is correctly in place in the rudder mounting, the ring should not be visible. 2. If the bearing is out of place the rudder mounting must be removed and the bearing must be secured by peening with a chisel or the complete rudder mounting must be exchanged. In addition execute instruction 3 at the same time. 3. Check if a securing washer (min. outside diameter 18mm, 0.71 inch) is installed according to the sketch a) If yes: The execution of this TN can be entered in the aircraft logs by a licensed inspector without further work to be done. b) If no: Remove the castellated nut, install the washer 8.4 DIN9021 and reinstall the nut. 1. Check if the washer is interfering with the rudder mount. If yes, use a washer 6,4DIN9021 St zn instead, enlarge the 6mm hole to 8mm to enable installation. 2. Check if the split pin can be installed. If yes, secure with a new split pin 2x20 DIN94 zu. If this is not possible, mark the position for a new hole and remove the rudder. Drill a new hole (diameter 2mm, .08 inch) 90° to the existing hole. Reinstall the rudder, use new split pins. rudder rudder mount 8,4DIN 125 St zn securing washer castellated nut (outside diameter min. 18mm) hole for split pin 76646 Bruchsal DG Flugzeugbau GmbH Technical Note page 2 from 2 No. 301/23 issue 2 No. 348/18 issue 2 323/14 issue 2 843/21 issue 2 359/21 issue 2 370/9 issue 2 826/44 issue 2 866/10 issue 2 Material : 1 washer 8,4 DIN9021 St zn, or 6,4DIN9021 St zn hole enlarged to 8mm 1 split pin 2x20 DIN94 zn 2 split pins 1,5x12 DIN94 zn If necessary lower rudder mounting: DG-100, DG-200: L14 DG-300, DG-400: 4L14 DG-500: 5L9 DG-600: 6R14 Weight and balance : influence negligible Remarks : Instructions No. 2 and 3 are to be executed by the manufacturer or by a licensed workshop and to be inspected and entered in the aircraft logs by a licensed inspector. Bruchsal, date: LBA - approved: June 11. 2004 Amended July7. 2004 The German original of this TN has been approved by the LBA under the date of Dipl. Ing. Wilhelm Dirks 08. Juli 04 and is signed by Mr. Blume. The translation into English has been done by best knowledge and judgement. Type certification EASA approved on 13 July 20d under Approval No. 2004 - 74 74 inspector: Dipl. Ing. Swen Lehner See Glen ## Registered aircraft it may concern (OpenAirDocs) Registry models matched by make and model, the same way as ADs, most registered aircraft first. - [Glaser-Dirks DG-400](https://openairdocs.org/model/glaser-dirks-dg-400): 22 registered aircraft (airframe model) - [Glaser-Dirks Flugzeugbau DG-200](https://openairdocs.org/model/glaser-dirks-flugzeugbau-dg-200): 7 registered aircraft (airframe model) - [Glaser-Dirks DG-500M](https://openairdocs.org/model/glaser-dirks-dg-500m): 5 registered aircraft (airframe model) - [Glaser-Dirks Flugzeugbau DG-100](https://openairdocs.org/model/glaser-dirks-flugzeugbau-dg-100): 2 registered aircraft (airframe model) --- 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.