Airworthiness directives › 2005-01-14
AD 2005-01-14 Airworthiness Directives; Bombardier-Rotax GmbH Type 912 F, 912 S, and 914 F Series Reciprocating Engines
Makes named: rotax. Models named: AMT-300, AMT-200S, Stemme S10-VT. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Bombardier-Rotax GmbH 912 F, 912 S, and 914 F series reciprocating engines. These engines are installed on, but not limited to, Diamond Aircraft Industries, DA20-A1, Diamond Aircraft Industries GmbH Model HK 36 TTS, Model HK 36TTC, and Model HK 36 TTC-ECO, Iniziative Industriali Italiane S.p.A. Sky Arrow 650 TC and Sky Arrow 650 TCN, Aeromot-Industria Mecanico Metalurgica ltda., Models AMT-300 and AMT-200S, and Stemme S10-VT aircraft.
Compliance
You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done. Initial Venting and Inspection for Correct Venting (f) Before the next engine start, for all Bombardier-Rotax GmbH 912 F, 912 S, and 914 F series reciprocating engines that have not been operated since doing any of the actions identified in section 1.5(a) of Rotax Mandatory Service Bulletin (MSB) SB-912-036/SB-914-022, Revision 1, dated August 2002, do the following: (1) Perform venting of the lubrication system; and (2) Perform inspection for correct venting of the hydraulic valve tappets. Use Section 3.1.1 through section 3.1.4 of the Accomplishment Instructions of Rotax MSB SB-912-036/SB-914-022, Revision 1, dated August 2002 to do the venting and inspection. Inspection of Engine Valve Train (g) Before the next engine start, for all Bombardier-Rotax GmbH 912 F, 912 S, and 914 F series reciprocating engines that have been operated for 50 hours or less on the effective date of this AD since doing any of the actions identified in section 1.5 (b) of Rotax MSB SB-912-036/SB-914-022, Revision 1, dated August 2002, do the following: (1) Disassemble and perform inspection of the engine valve train; and (2) Reassemble, vent the lubrication system, and inspect for correct venting of the hydraulic valve tappets. Use Section 3.1.5 through Section 3.1.7 of the Accomplishment Instructions of Rotax MSB SB-912-036/SB-914-022, Revision 1, dated August 2002. Repetitive Venting of the Lubrication System (h) Thereafter, for all Bombardier-Rotax GmbH 912 F, 912 S, and 914 F series reciprocating engines, after doing any of the actions in the following paragraphs (h)(1) through (h)(4), vent the lubrication system and inspect for correct venting of the hydraulic valve tappets before starting the engine. Use section 3.1.1 through section 3.1.4 of the Accomplishment Instructions of Rotax MSB SB-912-036/SB-914-022, Revision 1, dated August 2002 to do the venting and inspecting. (1) The installation of a new or overhauled engine. (2) The oil system has been opened allowing air to enter the valve train (e.g. oil pump, oil cooler, oil suction line removed which allows oil to drain from the engine oil galleries). (3) The engine oil was changed using procedures other than those included in section 1.2 of Rotax MSB SB-912-036/SB-914-022 Revision 1, dated August 2002. (4) The propeller was turned more than one turn in the wrong direction of rotation. Removal of Existing Oil Dipstick From Service (i) At the next oil change or within 100 hours time-in-service after the effective date of this AD, whichever is later, remove the oil dipstick, part number (P/N) 956150, from service, and install a dipstick that has a different P/N. Information on removing oil dipstick P/N 956150 from service can be found in Rotax MSB SB-912-040/SB-914-026, Revision 1, dated August 2003. Prohibition of Oil Dipstick, P/N 956150 (j) After the effective date of this AD, do not use dipstick P/N 956150 after complying with paragraph (i) of this AD. Alternative Methods of
Unsafe condition
This AD results from the manufacturer discovering that under certain circumstances, the oil level in the oil tank can fall below the minimum level required to sustain proper engine lubrication. The actions specified in this AD are intended to prevent damage to the engine valve train due to inadequate venting of the lubrication system, which can result in an in-flight engine failure and forced landing.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1