Document Retrieval System Listing of All Alert Service Bulletins For 2 Stroke & 4 Stroke Aircraft Engines For All Issue Dates Service Doc ID Title Date Download Size (K) (Old Document ID) Alert Service Bulletins Alert Service Bulletins contain service requirements and instructions that are very important to flight safety and must be addressed, complied with, or accomplished before continued flight operations.  Alert Service Bulletins will always be superseded by a Service Bulletin. ASB-915i-013iS Exchange of turbocharger/exhaust clamps on ROTAX® Engine Type 915 i (Series) and 916 i (Series) 2023-10-06 51 Due to a deviation in the machining process of the clamps, the affected batch may have developed cracks. ASB-916i-003iS Exchange of turbocharger/exhaust clamps on ROTAX® Engine Type 915 i (Series) and 916 i (Series) 2023-10-06 51 Due to a deviation in the machining process of the clamps, the affected batch may have developed cracks. ASB-915i-013 Exchange of turbocharger/exhaust clamps on ROTAX® Engine Type 915 i (Series) and 916 i (Series) 2023-10-06 380 Due to a deviation in the machining process of the clamps, the affected batch may have developed cracks. ASB-916i-003 Exchange of turbocharger/exhaust clamps on ROTAX® Engine Type 915 i (Series) and 916 i (Series) 2023-10-06 380 Due to a deviation in the machining process of the clamps, the affected batch may have developed cracks. ASB-915i-011 Inspection and re-torquing of oil spray nozzles for ROTAX® Engine Type 915 i A and 916 iSc B 2021-12-01 965 In isolated cases, one or more of the crankcase oil spray nozzles may not have been torqued to final tightening torque ASB-915i-011iS Inspection and re-torquing of oil spray nozzles for ROTAX® Engine Type 915 i A and 916 iSc B 2021-12-01 26 In isolated cases, one or more of the crankcase oil spray nozzles may not have been torqued to final tightening torque SB-912i-012 Inspection and/or installation of lock washer A6 for ROTAX® Engine Type 915 i A (Series) and 912i 2021-07-12 567 Internal quality checks revealed that in isolated cases, the lock washer between Allen screw M6x20 and cable clamps was not installed. This may lead to loosening of the Allen screw M6x20 ASB-912i-011iS Replacement of fuel pump assy. for ROTAX® Aircraft Engine Type 915 i A and 912 i (Series) R1 2019-11-27 31 Due to deviations in the manufacturing process of the electric fuel pump, a malfunction of fuel supply may occur. ASB-915iA-008iS Replacement of fuel pump assy. for ROTAX® Aircraft Engine Type 915 i A and 912 i (Series) R1 2019-11-27 31 Due to deviations in the manufacturing process of the electric fuel pump, a malfunction of fuel supply may occur. ASB-912i-011 Replacement of fuel pump assy. for ROTAX® Aircraft Engine Type 915 i A and 912 i (Series) R1 2019-11-27 99 Due to deviations in the manufacturing process of the electric fuel pump, a malfunction of fuel supply may occur. ASB-915iA-008 Replacement of fuel pump assy. for ROTAX® Aircraft Engine Type 915 i A and 912 i (Series) R1 2019-11-27 99 Due to deviations in the manufacturing process of the electric fuel pump, a malfunction of fuel supply may occur. ASB-912i-010 Inspection and/or replacement of fuel pump assy. for ROTAX® Engine Type 912 i and 915 i A (Series) 2019-03-13 124 MANDATORY: Internal quality checks have shown that in isolated cases, there may be fuel leakage in the front end area of the power connector side ASB-915iA-006 Inspection and/or replacement of fuel pump assy. for ROTAX® Engine Type 912 i and 915 i A (Series) 2019-03-13 124 MANDATORY: Internal quality checks have shown that in isolated cases, there may be fuel leakage in the front end area of the power connector side ASB-915iA-006iS Inspection and/or replacement of fuel pump assy. for ROTAX® Engine Type 912 i and 915 i A (Series) 2019-03-13 35 MANDATORY: Internal quality checks have shown that in isolated cases, there may be fuel leakage in the front end area of the power connector side ASB-912i-010iS Inspection and/or replacement of fuel pump assy. for ROTAX® Engine Type 912 i and 915 i A (Series) 2019-03-13 35 MANDATORY: Internal quality checks have shown that in isolated cases, there may be fuel leakage in the front end area of the power connector side ASB-914-054UL Exchange of exhaust valves on ROTAX® Engine Types 915 i A, 915 i B (Series) and 914 (Series) R2 2018-12-21 31 MANDATORY exchange of exhaust valve 32 mm (1.26 in.) with part no. 854113 R2 ASB-915iA-003iS Exchange of exhaust valves on ROTAX® Engine Types 915 i A, 915 i B (Series) and 914 (Series) R2 2018-12-21 31 MANDATORY exchange of exhaust valve 32 mm (1.26 in.) with part no. 854113 R2 ASB-914-054 Exchange of exhaust valves on ROTAX® Engine Types 915 i A, 915 i B (Series) and 914 (Series) R2 2018-12-21 189 MANDATORY exchange of exhaust valve 32 mm (1.26 in.) with part no. 854113 R2 ASB-915iA-003 Exchange of exhaust valves on ROTAX® Engine Types 915 i A, 915 i B (Series) and 914 (Series) R2 2018-12-21 189 MANDATORY exchange of exhaust valve 32 mm (1.26 in.) with part no. 854113 R2 ASB-915iB-003 Exchange of exhaust valves on ROTAX® Engine Types 915 i A, 915 i B (Series) and 914 (Series) R2 2018-12-21 189 MANDATORY exchange of exhaust valve 32 mm (1.26 in.) with part no. 854113 R2 ASB-912i-007 Checking of the correct positioning of sealing plug in ignition housing : ROTAX 912iSc/912iSc Sport 2017-06-06 192 Field observation has shown that in isolated cases the sealing plug was not pressed to its correct seating position in the ignition housing. ASB-912i-007iS Checking of the correct positioning of sealing plug in ignition housing for ROTAX 912iS/912iS Sport 2017-06-06 29 Field observation has shown that in isolated cases the sealing plug was not pressed to its correct seating position in the ignition housing. ASB-912-069 Exchange of floats on ROTAX® Engine Type 912 and 914 (Series) Rev.1 2016-07-22 168 Due to a deviation in the manufacturing process of the floats a partial separation of the outer skin because of resonance vibrations during engine operation may occur ASB-914-051 Exchange of floats on ROTAX® Engine Type 912 and 914 (Series) Rev.1 2016-07-22 168 Due to a deviation in the manufacturing process of the floats a partial separation of the outer skin because of resonance vibrations during engine operation may occur ASB-912-069UL Exchange of floats on ROTAX® Engine Type 912 and 914 (Series) Rev.1 2016-07-22 40 Due to a deviation in the manufacturing process of the floats a partial separation of the outer skin because of resonance vibrations during engine operation may occur ASB-914-051UL Exchange of floats on ROTAX® Engine Type 912 and 914 (Series) Rev.1 2016-07-22 40 Due to a deviation in the manufacturing process of the floats a partial separation of the outer skin because of resonance vibrations during engine operation may occur ASB-2ST-003 Exchange of floats on ROTAX® Engine Type 912 and 914 (Series) Rev.1 2016-07-22 40 Due to a deviation in the manufacturing process of the floats a partial separation of the outer skin because of resonance vibrations during engine operation may occur ASB-912i-005iS The use of lithium-ion batteries with the ROTAX Engine Type 912 i Series 2015-05-29 43 Advisory: Lithium batteries may only be used if a suitable battery management system is in place ASB-912-062 Checking of the cylinder head assy 2/3 for Rotax engine 912 and 914 (Series) R2 2013-05-01 160 Due to deviation in the manufacturing process, some cylinder heads may have an oil leak in the intake channel. There is a possibility of small machined through holes, which can increase the oil consumption which may result in engine stoppage. ASB-912-062UL Checking of the cylinder head assy 2/3 for Rotax engine 912 and 914 (Series) R2 2013-05-01 33 Due to deviation in the manufacturing process, some cylinder heads may have an oil leak in the intake channel. There is a possibility of small machined through holes, which can increase the oil consumption which may result in engine stoppage. ASB-914-044 Checking of the cylinder head assy 2/3 for Rotax engine 912 and 914 (Series) 2013-03-01 509 Due to deviation in the manufacturing process, some cylinder heads may have an oil leak in the intake channel. There is a possibility of small machined through holes, which can increase the oil consumption which may result in engine stoppage. ASB-914-044UL Checking of the cylinder head assy 2/3 for Rotax engine 912 and 914 (Series) 2013-03-01 509 Due to deviation in the manufacturing process, some cylinder heads may have an oil leak in the intake channel. There is a possibility of small machined through holes, which can increase the oil consumption which may result in engine stoppage. ASB-912-061 Replacement of the pressure side fuel hose at fuel pump part no 839114 REV.1 2012-05-01 180 Due to variations in the manufacturing of the fuel hose, rubber particles may become detatched. These particles can interfere or supress the fuel mixture in the carburetor. This may lead to rough operation, or shutdown. Rev. 1 ASB-912-061UL Replacement of the pressure side fuel hose at fuel pump part no 839114 REV.1 2012-05-01 180 Due to variations in the manufacturing of the fuel hose, rubber particles may become detatched. These particles can interfere or supress the fuel mixture in the carburetor. This may lead to rough operation, or shutdown. Rev. 1 ASB-912-060 Checking of the oil pump fixation bolts on Rotax engine type 912 and 914 2012-01-01 180 During quality checks, it was discvered in a limited number of engines during production the oil pu,p fixation bolts may not have been toqued to the proper specification. ASB-912-060UL Checking of the oil pump fixation bolts on Rotax engine type 912 and 914 2012-01-01 180 During quality checks, it was discvered in a limited number of engines during production the oil pu,p fixation bolts may not have been toqued to the proper specification. ASB-914-043 Checking of the oil pump fixation bolts on Rotax engine type 912 and 914 2012-01-01 180 During quality checks, it was discvered in a limited number of engines during production the oil pu,p fixation bolts may not have been toqued to the proper specification. ASB-914-043UL Checking of the oil pump fixation bolts on Rotax engine type 912 and 914 2012-01-01 180 During quality checks, it was discvered in a limited number of engines during production the oil pu,p fixation bolts may not have been toqued to the proper specification. ASB-912-059 CANCELLED - Checking of the crankshaft journal for Rotax engine type 912 and 914 2011-11-01 180 Due to a deviation in the manufacturing process, some crankshafts may have a crack formation occur on the power take off side. REPLACED by SB-912-059/SB-914-042 latest edition. ASB-912-059UL CANCELLED - Checking of the crankshaft journal for Rotax engine type 912 and 914 2011-11-01 180 Due to a deviation in the manufacturing process, some crankshafts may have a crack formation occur on the power take off side. REPLACED by SB-912-059/SB-914-042 latest edition. ASB-914-042 CANCELLED - Checking of the crankshaft journal for Rotax engine type 912 and 914 2011-11-01 180 Due to a deviation in the manufacturing process, some crankshafts may have a crack formation occur on the power take off side. REPLACED by SB-912-059/SB-914-042 latest edition. ASB-914-042UL CANCELLED - Checking of the crankshaft journal for Rotax engine type 912 and 914 2011-11-01 180 Due to a deviation in the manufacturing process, some crankshafts may have a crack formation occur on the power take off side. REPLACED by SB-912-059/SB-914-042 latest edition. ASB-912-053 Replacement of Fuel Pump for Rotax Engine Type 912 (Series) 2007-02-01 1 Replaced by SB-912-053 ASB-912-053UL Replacement of Fuel Pump for Rotax Engine Type 912 (Series) 2007-02-01 1 Replaced by SB-912-053UL ASB-912-051 Checking Of Magnetic Plug On Rotax Engine Type 912/914 2006-10-01 672 In a limited number of cases increased wear of the camshaft/hydraulic valve tappet can occur. Addition checks of the engine magetic plug are required for affected engines. ASB-912-051UL Checking Of Magnetic Plug On Rotax Engine Type 912/914 2006-10-01 690 In a limited number of cases increased wear of the camshaft/hydraulic valve tappet can occur. Addition checks of the engine magetic plug are required for affected engines. ASB-914-034 Checking Of Magnetic Plug On Rotax Engine Type 912/914 2006-10-01 672 In a limited number of cases increased wear of the camshaft/hydraulic valve tappet can occur. Addition checks of the engine magetic plug are required for affected engines. ASB-914-034UL Checking Of Magnetic Plug On Rotax Engine Type 912/914 2006-10-01 690 In a limited number of cases increased wear of the camshaft/hydraulic valve tappet can occur. Addition checks of the engine magetic plug are required for affected engines. ASB-912-045 Inspection of the Oil Filter Part No. 825701 Rev. 1 2004-10-01 0 Replaced by SB-912-045 ASB-912-045UL Inspection of the Oil Filter Part No. 825701 Rev. 1 2004-10-01 0 Replaced by SB-912-045UL ASB-914-030 Inspection of the Oil Filter Part No. 825701 Rev.1 2004-10-01 0 Replaced by SB-914-030 ASB-914-030UL Inspection of the Oil Filter Part No. 825701 Rev. 1 2004-10-01 0 Replaced by SB-914-030UL ASB-914-028 Inspection Of The Exhaust Muffler For Rotax Type 914 - REPLACED by SB-914-028 2003-08-01 54 Cracks have been found on some Rotax exhaust mufflers (PN 979402) installed on Rotax 914 series engines. Exhaust muffler must be inspected before next flight and daily there after until further notice. Revision 1.