content_image/560425.jpg
However, they may only perform maintenance, preventive maintenance, and an alteration on a light-sport aircraft for which the holder has completed the training specified in the preceding paragraphs. Before performing a major repair, the holder must complete additional training acceptable to the FAA and appropriate to the repair performed. 

The holder of a repairman certificate (light-sport aircraft) with a maintenance rating may not approve for return to service any aircraft or part thereof unless that person has previously performed the work concerned satisfactorily. If that person has not previously performed that work, the person may show the ability to do the work by performing it under the direct supervision of a certificated and appropriately rated mechanic, or a certificated repairman who has had previous experience in the specific operation concerned. The repairman may not exercise the privileges of the certificate unless the repairman understands the current instructions of the manufacturer and the maintenance manuals for the specific operation concerned. 

## Authorized Personnel That Meet FAA Regulations 

All applicable aviation regulatory authority regarding maintenance procedures must be met. Maintenance organizations and personnel are encouraged to contact the manufacturer for more information and guidance on any of the maintenance procedures. 

It is a requirement that every individual or maintenance provider possess the required special tooling, training, or experience to perform all tasks outlined. Maintenance providers that meet the following conditions outlined below may perform engine maintenance providing they meet all of the following FAA requirements: 

• Knowledge of the specific task as a result of receiving authorized training from a training provider. 

• Previous experience in performing the task and formal instruction from a manufacturer’s authorized training facility or “on-the-job” instruction by a manufacturer’s representative. 

• A suitable work environment to prevent contamination or damage to engine parts or modules is needed. 

• Suitable tools and fixtures as outlined in the manufacturers’ Maintenance Manual should be used while performing maintenance requiring such tooling. 

• Reasonable and prudent maintenance practices should be utilized. 

## Types of Light-Sport and Experimental Engines 

Note: All information in this text is for educational illustrational purposes and is not to be used for actual aircraft maintenance. This information is not revised at the same rate as the maintenance manual; always refer to the current maintenance information when performing maintenance on any engine. 

## Light-Sport Aircraft Engines 

Light-sport/ultralight aircraft engines can be classified by several methods, such as by operating cycles, cylinder arrangement, and air or water cooled. An inline engine generally has two cylinders, is two-cycle, and is available in several horsepower ranges. These engines may be either liquid cooled, air cooled, or a combination of both. They have only one crankshaft that drives the reduction gear box or propeller directly. Most of the other cylinder configurations used are horizontally opposed, ranging from two to six cylinders from several manufacturers. These engines are either gear reduction or direct drive. 

## Two-Cycle, Two Cylinder Rotax Engine Single Capacitor Discharge Ignition (SCDI) Dual Capacitor Discharge Ignition (DCDI) 

Rotax 447 UL (SCDI) and Rotax 503 UL (DCDI) 

The Rotax inline cylinder arrangement has a small frontal area and provides improved streamlining.  [Figure 11-2] The two cylinder, inline two-stroke engine, which is piston ported with air cooled cylinder heads and cylinders, is available in a fan or free air cooled version. Being a two-stroke cycle 

<img src='content_image/560425.jpg'>

