# Stemme Service Bulletin P062-980082: Revision 01 - Rights: © Stemme. Filed by the FAA in regulations.gov docket FAA-2026-4637; AD 2026-15-08 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. - Document: [Stemme Service Bulletin P062-980082](https://openairdocs.org/service-documents/stemme/p062-980082.md) - Title as filed: Stemme -SB-P062-980082-Rev01 - Pages: 3 - PDF: https://openairdocs.org/files/sha256/db/63/db63ad31287f899cde19db53476d5f3871ec1cb64f0c9a28c14580763763741c - Page: https://openairdocs.org/service-documents/stemme/p062-980082/file/db63ad31287f ## Text 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) DOC.NO =TEMN SERVICE BULLETIN P062-980082 REVISION: 01 EASA.21J.250 PAGE 1 OF 3 ATA28 - Fuel - Aircraft Fuel System The technical content of this document is approved under the authority of DOA ref. EASA.21J.250. SUBJECT: Replacement of copper sealing ring P/N D7603-12016-CU by FKM (Viton®) sealing ring P/N 831984 of screw-in adapter AFFECTED AIRPLANES: Type: STEMME S10 Variant: STEMME S12 TCDS: EASA.A.054, G06CE (FAA) and foreign Type Acceptance Serial Numbers: 12-001 up to and included 12-060 TIME OF COMPLIANCE: 1. Immediately, if fuel leakage is detected during daily inspection / pre-flight check 2. At the next annual inspection or engine 100h-inspection REASON: Due to possible leakage between connecting parts of the fuel system, the copper sealing ring P/N D7603-12016-CU in the pump set P/N 128201 and drainer complete P/N 128207 assemblies must be replaced by a FKM (Viton®) sealing ring P/N 831984 that will be integrated into the screw-in adapter. ACTIONS: Action 1 - Preparation Drain center fuselage tank until it is empty. Attention: Remaining fuel can leak out during disassembling of fuel system components. Action 2 - Replacement in pump set P/N 128201 assembly The pump set P/N 128201 is located at the front left area of the middle fuselage. It can be serviced from below when the main landing gear is extended. The first copper sealing ring P/N D7603-12016-CU is installed between the screw-in adapter 1 P/N 831099 (see Figure 1) and the fuel distributor P/N 128229. At first unscrew the union nut of the fuel shut off valve pipe P/N 128204. Then unscrew and remove the screw-in adapter P/N 831099 and the copper sealing ring P/N D7603-12016-CU from the fuel distributor P/N 128229. Insert the new FKM (Viton®) sealing ring P/N 831984 into the unmounted adapter P/N 831099 and screw both parts back to the fuel distributor P/N 128229. Secure it with Loctite 243 (A061) according to drawing P304-128201/06. Finally screw the union nut of the fuel shut off valve pipe P/N 128204 back onto the screw-in adapter P/N 831099. prepared signature verified signature Date of issue supersedes Office of Asceness Date of approva revision Rodenacker Lengert 15.07.2025 30.04.2025 мРІ 15.07.2025 ORM FEB-062, DATE OF ISSUE: 15JUL2024 ### Page 2 (OCR) DOC.NO STEMME SERVICE BULLETIN P062-980082 EASA.21J.250 REVISION: O PAGE 2 OF 3 The second copper sealing ring P/N D7603-12016-CU is installed between the screw-in adapter 2 P/N 831099 (see Figure 1) and the fuel distributor P/N 128228. At first unscrew the union nut of the fuel tank pipe P/N 128203. Then unscrew and remove the screw-in adapter P/N 831099 and the copper sealing ring P/N D7603-12016-CU from the fuel distributor P/N 128228. Insert the new FKM (Viton®) sealing ring P/N 831984 into the unmounted adapter P/N 831099 and screw both parts back to the fuel distributor P/N 128228. Secure it with Loctite 243 (A061) according to drawing P304-128201/06. Finally screw the union nut of the fuel tank pipe P/N 128203 back onto the screw-in adapter P/N 831099. 34 | 11AB-M08 5 128237 Screw-in Adapter 1 4 128236 33 831099 * 27 10M-131 29 E-330 46 E-331 32 | M415 " 27 10M-181 " 25 D7603-12016-CU Ring 1 Copper Sealing 3 128229 30 | 10AB-TR43 (13 200141- 10 128242 _ 30 10A6-TR43 43 E-02 29 E-330 L1 | 832155 31 E-18 7 128239 (40 932153 (9 128241) 28 M518 agen sind nicht moliste 27 10M-181 Screw-in Adapter 2 33 831099 11 128243 25 D7603-120°6-CJ 12 200140 28 M618 * 30 10AB-TR43 Copper Sealing 30 10AB-TR43 -29 E-330 Ring 2 (29 |E-330 - 4 | 128236 46 E-331 2 | 128228 27 10M-181) 22 M415 14 11AB-M02 34 11AB-M08 27 / 101-181) * 6 128238 Figure 1: Pump Set assembly (currently installed version) Action 3 - Replacement in drainer complete P/N 128207 assembly The drainer complete P/N 128207 is located at the main landing gear bay. It can be serviced from below when the main landing gear is extended. The copper sealing ring P/N D7603-12016-CU is installed between the screw-in adapter P/N 831099 and the drainer attachment P/N 128271. At first unscrew the union nut of the drainer pipe P/N 200324. Then unscrew and remove the screw-in adapter P/N 831099 and the copper sealing ring P/N D7603-12016-CU from the drainer attachment P/N 128271. Also unmount the drainer P/N 10AB-12 and the drainer attachment P/N 128271 from the sheet metal part P/N 128254. The drainer P/N 10AB-12, O-ring P/N M511 and nut P/N D936-20 can be reused if they are not worn. The drainer attachment P/N 128271 will be replaced by the new part P/N 128282. Now insert the new FKM (Viton®) sealing ring P/N 831984 into the unmounted adapter P/N 831099 and install it together with the drainer P/N 10AB-12, O-ring P/N M511, nut P/N D936-20 and new drainer attachment P/N 128282 according to drawing P304-128207/02. Finally screw the union nut of the drainer pipe P/N 200324 back onto the screw-in adapter P/N 831099. FORM FEB-062, DATE OF ISSUE: 15JUL2024 ### Page 3 (OCR) DOC.NO SERVICE BULLETIN P062-980082 EASA.21J.250 REVISION: 01 PAGE 3 OF 3 Screw-in Adapter Copper Sealing Ring 3 831099) 5 D7603-12016-CU (D936-20) 1 128271 Drainer Attachment 2 128254 10AB-12) 8 M511 Figure 2: Drainer complete assembly (currently installed version) MATERIAL AND DOCUMENTS: Material: - Installation Kit SB 980082 - Fuel system 1x P/N 128284 Documents: - Pump Set assembly - Drainer complete assembly - Aircraft Maintenance Manual S12 P304-128201/06 P304-128207/02 L500-912820 latest revision L500-912850 latest revision MASS AND BALANCE: Not affected. REMARKS: For any question concerning the technical content of the requirements in this Service Bulletin, please contact: STEMME GmbH, Flugplatzstrasse F2 Nr. 7, 15344 Strausberg, GERMANY Telephone: +49 3341 3612 0, FAX: +49 3341 3612 30, E-mail: airworthiness[at]stemme.com FORM FEB-062, DATE OF ISSUE: 15JUL2024 --- 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.