S10 EASA AD Valve Tappet
March 13, 2008 | 2006-0316 R1
In limited cases, increased wear of camshaft/hydraulic valve tappet can occur. This may lead to improper engine operation, power loss or in-flight engine failure. To address and correct this problem, BRP-Rotax GmbH & Co. KG issued Alert Service Bulletins ASB-912-051 and ASB-914-034 which describe a special inspection for the affected engines. EASA issued Emergency AD 2006-0316-E to require the inspection of these engines as described in the referenced ASB’s. Since then, BRP-Rotax has introduced hydraulic valve tappet P/N 854.095 on production engines and P/N 881.831 as spare part, eliminating the need for these repetitive inspections. Consequently, this AD has been revised to limit the applicability to those engines that do not have this new hydraulic valve tappet installed.