MANDATORY SERVICE BULLETIN NO. MSB 40NG-064 REV. 3

MANDATORY SERVICE BULLETIN Model DA 40 NG MSB 40NG-064 Rev. 3 Page 5 of 6 23 January 2025 II.3 Labour Effort Approximately 16 hours will be required to accomplish this service bulletin. II.4 Credit Parts and labour for all aircraft within warranty. II.5 Reference Documents DA 40 NG series Airplane Maintenance Manual, Doc. No. 6.02.15, latest effective issue. III REMARKS 1. All work must be done by a certified aircraft service station, or a certified aircraft maintenance mechanic. 2. All work, in particular that which is not especially described in this service bulletin, must be done in accordance with the referenced Maintenance Manual. 3. Completion of all work must be recorded in the logbook. 4. If material and/or labour hours are subject to be credited through Diamond Aircraft Industries, the service bulletin must be done within the time of compliance, and the following documents must be sent to Diamond Aircraft Industries not later than 30 days after completion of work. • Warranty Application • Work Report of the new installed fuel tank connection hoses D4D-2817-10-70_01 • Form One of replaced affected fuel tank connection hoses D4D-2817-10-70, and the Work Report of their installation 5. In case of doubt, contact Diamond Aircraft Industries. © DAI 2024 ALL RIGHTS RESERVED, PROPRIETARY DOCUMENT Internet: diamondaircraft.com Service & Support Portal: partners.diamondaircraft.com Diamond Aircraft Industries MANDATORY SERVICE BULLETIN Model DA 40 NG MSB 40NG-064 Rev. 3 Page 6 of 6 23 January 2025 EXECUTION REPORT TO SERVICE BULLETIN MSB 40NG-064 REV. 3 Please submit the Execution Report through the Diamond Partner Portal at https://partners.diamondaircraft.com/ AIRPLANE DATA Airplane Serial Number Airplane Registration Airplane Operator Hours of Operation Airplane (TSN) Typical operation of airplane private, club, training, other: MAINTENANCE DATA: Inspection carried out on Inspection carried out by During scheduled inspection: Yes No Hoses deteriorated? Yes No Date Name Signature © DAI 2019 ALL RIGHTS RESERVED, PROPRIETARY DOCUMENT Internet: diamondaircraft.com Service & Support Portal: partners.diamondaircraft.com Diamond Aircraft Industries WORK INSTRUCTION Model DA 40 NG WI-MSB 40NG-064 Rev. 0 Page 1 of 4 01 July 2019 WORK INSTRUCTION WI-MSB 40NG-064 REV. 0 I GENERAL INFORMATION I.1 Subject Replacement of fuel tank connection hoses (flexible couplings). I.2 Reference Documents DA 40 NG series Airplane Maintenance Manual, Doc. No. 6.02.15, latest effective issue. I.3 Remarks 1. All work must be done by a certified aircraft service station or a certified aircraft maintenance mechanic. 2. All work, in particular if not described in this work instruction, must be done in accordance with the referenced maintenance manual. 3. For conversion factors between SI units and US/Imperial units, refer to AMM Chapter 02. 4. In case of doubt, contact Diamond Aircraft Industries Inc. II DRAWINGS, SPECIAL TOOLS & MATERIALS II.1 Drawings None. II.2 Special Tools None. II.3 Material Qty Part Number Description 2 D4D-2817-10-70_01 Fuel tank connection hose (flexible coupling) for DA 40 NG 1 D4D-9028-07-02 Check valve filter in fuel transfer line © DAI 2019 ALL RIGHTS RESERVED, PROPRIETARY DOCUMENT Internet: diamondaircraft.com Service & Support Portal: partners.diamondaircraft.com Diamond Aircraft Industries WORK INSTRUCTION Model DA 40 NG WI-MSB 40NG-064 Rev. 0 Page 2 of 4 01 July 2019 III INSTRUCTIONS NOTE: the following images show the difference between the two types of fuel tank connection hoses (flexible couplings) in the field. • D4D-2817-10-70, this fuel tank connection hose has a light blue layer in the cross-section. Only a fraction of these hoses come from the affected two batches. • D4D-2817-10-70_01, this fuel tank connection hose has an all black cross section and is not affected. © DAI 2019 ALL RIGHTS RESERVED, PROPRIETARY DOCUMENT Internet: diamondaircraft.com Service & Support Portal: partners.diamondaircraft.com Diamond Aircraft Industries WORK INSTRUCTION Model DA 40 NG WI-MSB 40NG-064 Rev. 0 Page 3 of 4 01 July 2019 III.1 Replacement of Main Fuel Tank Connection Hoses 1. Remove the main fuel tank assembly from the aircraft in accordance with AMM Chapter 28-10. 2. Disassemble the main fuel tank assembly in accordance with AMM Chapter 28-10. 3. Examine the fuel tank connection hoses for damage, deterioration, and detached rubber parts. 4. If the fuel tank connection hoses are found to be damaged, inspect the fuel tank chambers, and remove detached rubber material in accordance with Section III.2 of this service bulletin. 5. Assemble the main fuel tank assembly with the new fuel tank connection hoses (P/N D4D-2817- 10-70_01) in accordance with AMM Chapter 28-10. 6. Install the main fuel tank assembly in to the aircraft in accordance with AMM Chapter 28-10. 7. Do steps 1 to 6 on the opposite side of the aircraft. 8. Clean working areas, and check for foreign objects. 9. Check all altered, replaced, repaired parts for proper function. 10. Test all systems in working area for proper function. 11. Make all necessary entries in the airplane logs. 12. Fill in the execution report, and send it to Techpubs@diamondair.com. III.2 Inspection of Main Fuel Tank Chambers and Removal of Detached Rubber Parts 1. Examine all fuel tank chambers for detached rubber material. Remove any detached rubber material from the fuel tank chambers. CAUTION: pay increased attention to areas with limited access of the inner chamber of the main fuel tank, especially the area in the fuel trap and the area underneath the fuel trap (sediment trap & drain). NOTE: to improve access and inspectability of these areas, the fuel low level switch, the fuel temperature sensor, and the fuel finger filter can be removed. NOTE: optionally, use a borescope to inspect areas with limited access. 2. If removed during examination of the fuel tank chambers for detached rubber particles: A. Install the fuel low level switch. B. Install the fuel temperature sensor. C. Install the fuel finger filter. 3. Remove, clean, and re-install the fuel gascolator filter in accordance with AMM Chapter 28-20. © DAI 2019 ALL RIGHTS RESERVED, PROPRIETARY DOCUMENT Internet: diamondaircraft.com Service & Support Portal: partners.diamondaircraft.com Diamond Aircraft Industries WORK INSTRUCTION Model DA 40 NG WI-MSB 40NG-064 Rev. 0 Page 4 of 4 01 July 2019 4. Remove and inspect the check valve filter in the fuel transfer line. If the check valve filter is found to be contaminated, replace the check valve. CAUTION: do not disassemble the fuel transfer check valve. Inspect visually. 5. Flush all fuel lines connecting the main fuel tanks to the gascolator with clean fuel.