Airworthiness directives › 2013-07-12
AD 2013-07-12 Airworthiness Directives; BRP-Powertrain GmbH & Co KG Rotax Reciprocating Engines
Makes named: rotax. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to the following BRP Powertrain GmbH & Co KG Rotax reciprocating engines: (1) Rotax 912 F2; 912 F3; and 912 F4, from serial number (S/N) 4,413,013 up to S/N 4,413,017 inclusive. (2) Rotax 912 S2; 912 S3; and 912 S4, from S/N 4,924,468 up to S/N 4,924,491 inclusive. (3) Rotax 914 F2; 914 F3; and 914 F4, from S/N 4,421,156 up to S/N 4,421,169 inclusive.
Compliance
For the purpose of this AD, unusual deposits (excessive carbon or oil) is when: (1) Carbon is a visual buildup of dark carbon deposits on the center and grounding electrodes as well as the immediate surrounding area, and (2) Excessive oil is a visual buildup indicated by the presence of oil on the center and grounding electrodes as well as the immediate surrounding area, giving a wet appearance.
Required actions
The Manager, Engine Certification Office, FAA, may approve AMOCs to this AD. Use the procedures found in 14 CFR 39.19 to make your request.
Unsafe condition
Unless already done, do the following actions. (1) Within 5 flight hours or 20 days after the effective date of this AD, whichever occurs first, perform a one-time visual inspection of the center and grounding electrodes of both top and bottom spark plugs on cylinder 2, and cylinder 3, for unusual deposits (excessive carbon or oil). Any excess indicates the cylinder head is not manufactured to proper specification and is leaking oil into the combustion chamber. (2) Before further flight, replace cylinder heads found to be not manufactured to proper specification. (3) From the effective date of this AD, do not install any engine listed in the applicability of this AD on an airplane, unless the engine has been inspected and, depending on the findings, affected cylinder heads have been replaced as required by this AD.
Affected ADs
None.
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