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Rotax 912 & 914 - MANDATORY ALERT SERVICE BULLETIN

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MANDATORY alert SERVICE BULLETIN

SB-912-059 / SB-912-059-UL

SB-914-042 / SB-914-042-UL

ASB912059-1.jpg

Rotax has released a Mandatory alert Service Bulletin which covers checking of the crankshaft journal for cracks on certain Rotax 912 and 914 series aircraft engines including a small portion of serial specific crankshafts sold as spare parts. This ASB affects only a limited number of engines and spare parts crankshafts (approximately 200 worldwide), and is serial number specific.

To check whether your engine or crankshaft is affected by this bulletin, see section 1 of the bulletin for a list of engine and Crankshaft serial numbers affected. It is important to note, If your engine has been recently overhauled, or has had a repair which included a crankshaft replacement, you should check your crankshaft serial number with those listed in this bulletin(s).

Serial numbers for Certified and Non-Certified engines are listed in separate bulletins. Be sure to check the corresponding bulletin for your engine type. Serial numbers for Certified engines are listed in alert Service Bulletin ASB-912-059/914-042. Serial numbers for Non-Certified engines are listed in alert Service Bulletin ASB-912-059UL/914-042UL. The “UL†designates Non-Certified engines. Certified engines are identifiable by a RED colored serial number tag (located on the ignition housing). Non-Certified engines have a BLACK serial number tag.

Engines and crankshafts found to be within the affected serial number ranges as listed in the ASB, must be checked before further flight is permitted, but at the latest before January 1st 2012. If you find your serial number is in the affected range, and a Ferry Flight is required to move the aircraft to an acceptable NDT inspection facility, you must conduct an immediate magnetic plug inspection first. If no unusual or excess material is found on the magnetic plug, further flight to a maximum of 4 hrs. is permitted. This is to allow the aircraft to be taken to a qualified facility for final NDT testing to determine if the crankshaft has any crack formation. This NDT test is not re-occurring and any engines/crankshafts which pass the inspection are deemed unaffected and therefore can continue service with no further action.

It should be noted the NDT Penetration test (DIN EN 571) as listed in the bulletin, may not meet compliance with testing requirements of all aviation authorities in all countries. A suitable and equivalent test that can be used is an NDT Florescent Penetration test (ASTM 1417-05-E1). In all cases, such NDT testing should be conducted by a qualified technician approved by your local aviation authorities.

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Click HERE to download a copy of this Service Bulletin

for UL engines.

Click HERE to download a copy of this Service Bulletin

for Certified engines.

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