Service Bulletin: SB-001 Rev B

CORRECT AN ADAPTER OIL LEAK OR LOOSE SLEEVE BY TIGHTENING THE SPOOL ON USED GASKETS. f. Replace broken or missing Tamper Seal before approving the aircraft for return to service. 4. Remove the adapter from the engine. Cut and remove the safety-wire as necessary. Then, unscrew the spool from the engine oil pump housing and remove the adapter. Tag the aircraft “OUT OF SERVICE – DO NOT FLY” until appropriate repairs are accomplished. 5. Reinstall the oil filter adapter in accordance with the model-specific Installation Instructions (dated 2/21/2020 or later) and ICA (dated 3/05/2020 or later) applicable to your model oil filter adapter. It is imperative that the instructions in the Installation Instructions and ICA be followed. Note: Stratus Tool Technologies has discontinued the use of fiber gaskets. Only copper gaskets are approved for initial installation or reinstallation of F&M or Stratus Tool Technologies oil filter adapters. Figure 4 SAFETY- WIRE securing the body itself against CCW rotation Page 6 of 11 Revision: B Revised: 6-17-21 6. The following information is provided to assist you in carrying out the instructions in the Installation Instructions, ICA, and this Service Bulletin. In conjunction with the latest FAA approved installation instructions (dated 2/21/2020 or later) and FAA accepted ICA (dated 3/05/2020 or later), the following inspection and verification steps are recommended: Occurrence Recommended Action Each oil change When inspecting the oil filter adapter for oil seepage per step 4.a of Stratus Tool Technologies, LLC ICA ST001, also perform the following inspection to verify gasket integrity and installed location: a. Inspect the adapter installation for signs of oil leakage, displaced gaskets, looseness, damage or other anomalies. If any defects are found, replace both gaskets with new copper gaskets prior to further flight in accordance with the applicable Stratus Tool Technologies installation instructions dated 2/21/2020 or later. DO NOT INSTALL OR REUSE A FIBER GASKET in any F&M or Stratus oil filter adapter. Each 100-hour or annual inspection Any time the adapter is removed or installed Following any oil filter installation Check and verify per step 4.d of Stratus Tool Technologies, LLC ICA ST001 “that the sleeve will not rotate around the oil transfer spool when approximately 10 to 20 pounds of force is applied to an oil filter mounted on the adapter in a manner that would tend to rotate the sleeve around the spool…” If the sleeve rotates around the spool, replace both copper gaskets and reinstall the adapter in accordance with the current applicable Stratus Tool Technologies installation instructions. NOTE: Whenever tightening the spool to 65 ft-lbs of torque, ensure the gaskets and sleeve do not rotate around the spool, as damage may occur to the gaskets. If this occurs, replace both gaskets and reinstall per the appropiate installation instructions. Page 7 of 11 Revision: B Revised: 6-17-21 Throughly clean the threads of the oil pump housing, see Figure 5. (You may need to dip or siphon excess oil from the oil pump housing to facilitate cleaning the oil pump housing threads). Lubricate the threads with clean engine oil. Lubricate the large diameters and under the flange of the spool with clean engine oil as shown in Figure 6. Lubricate the inside diameter and top surface of the sleeve with clean engine oil as shown in Figure 7. Lubericate one copper gasket with engine oil and install it onto the spool with the split side of the gasket turned away from the spool’s flange, see Figure 8. Slide the spool through the sleeve’s bore and place the second copper gasket on the spool with the split side of the gasket away from the sleeve, see Figure 9. Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Page 8 of 11 Revision: B Revised: 6-17-21 Thread the spool into the oil pump housing, when the adapter is ready to be tightened, use a fine point felt pen to make a match mark on the sleeve and oil pump housing as shown in Figure 10. Fabricate a wooden block/wedge that will fit snugly between the oil filter mount flange and an adjacent structurally sound part of the engine or airframe that is competent to resist the turning forces encountered when tightening the spool. Place the block so that as the spool is tightened, the sleeve cannot rotate with the spool. See the exemplar arrangement in Figures 11 and 12. Note: Because the oil filter adapters are used on many different aircraft, the block/wedge arrangement will be different in different aircraft. With the block in place, tighten the spool to 65 ft-lbs torque. If the match marks misalign by more than 1/32 inch after tightening the spool, i.e., the sleeve has moved relative to the oil pump housing, remove the adapter assembly from the engine as previously described. Replace both gaskets with new copper gaskets, relube the sleeve, spool, and top gasket with engine oil as shown in figures 6 and 7 and reinstall the adapter in accordance with the instructions contained in the Installation Instructions and ICA applicable to your model adapter. Figure 10 Figure 11 Figure 12 Page 9 of 11 Revision: B Revised: 6-17-21 When the installation is successful, i.e., the match marks are aligned within limits, and the spool is tightened to 65 ft-lbs torque, safety-wire the: a. spool to the engine (Figure 13) and, b. the sleeve to the engine. Wrap the wire around the sleeve in such a manner that the sleeve cannot turn counter-clockwise, see Figure 14. Install the oil filter. Tighten it to the torque recommended by the filter manufacturer. Safety-wire the filter to the safety-wire tab on the sleeve, see Figure 15. Do not secure any safety-wire from the filter adapter or filter to the airframe. Figure 13 Figure 14 Figure 15 Page 10 of 11 Revision: B Revised: 6-17-21 When the adapter is successfully installed, clean any residual oil from the adapter and apply a bead of Tamper Seal from the oil pump housing across the copper gasket and onto the sleeve as shown in Figure 16. 7. PRIOR TO APPROVAL FOR RETURN TO SERVICE: a. Reinstall any airframe or engine parts removed in accordance with the airframe or engine manufacturer’s instructions. b. Check and, if necessary, replenish the engine oil. The filter may hold up to about one quart of oil, so check the engine oil after the leak check engine run. c. Perform an engine run to check for oil leaks. Run the engine for at least 5 minutes. Stop the engine and inspect the adapter installation for leaks. d. Make a detailed logbook entry referencing this Service Bulletin Number SB- 001 Rev B dated 5/26/21, or later revision, to memorialize the adapter installation inspections and re-installation, and/or any other work accomplished while complying with this service bulletin. Figure 16 Page 11 of 11 Revision: B Revised: 6-17-21 For additional information regarding this Service Bulletin, contact: Stratus Tool Technologies, LLC 2208 Air Park Drive Burlington, NC 27215 800-822-3200 For the most up-to-date, model-specific Installation Instructions and Instructions for Continued Airworthiness, please visit TempestPlus.com/products/oil-filter-adapters/ Safety First: Stratus Tool Technologies, LLC is a customer-service orientated company committed to technical innovation in pursuit of aviation safety. While Stratus Tool Technologies has no authority to compel aircraft owners and/or operators to act responsibly and take prudent action to ensure their own safety and the safety of others, Stratus Tool Technologies believes that compliance with this MANDATORY service bulletin is important and will help ensure better maintained and better performing products.