Oil Radiator Sets for ROTAX Aircraft Engines

The oil radiator and so might not be a part of the Engine Type Design. Such a PAC part may be declared as part of the oil system on aircraft-side has been then tested and released by BRP-Rotax, but it might not be certified for the relevant engine type. In such a case the correct function in conjunction with the entire system is the responsibility of the aircraft manufacturer and must be carried out jointly with the aircraft.

Concurrent ASB/SB/SI and SL
In addition to this Service Instruction - PAC the following SI-PAC should be considered: SI-PAC-013, title “Oil system connectors”, current issue. In the course of continuous development and standardization, a oil radiator/-sets has been introduced as an optional extra part.

PERMISSIBLE POSITION AND LOCATION
Non-compliance can result in serious injuries or death! The components must be designed and installed such that the permissible operating temperatures are maintained and the max. values are not exceeded. This must also apply to “Hot day conditions”. If need be, take appropriate measures.

The oil radiator should always be installed below the engine oil pump. If this position is not practical:

• The oil radiator must be installed with the radiator fittings pointing upwards i.e. in positive direction on the z-axis. This will prevent unintentional draining of the oil radiator during longer periods of engine stop.
• The oil radiator must be installed in a way e.g. by using proper brackets to avoid that bending forces/vibration could cause fracture when mounting the oil radiator on the both connector positions.

Specifications of the oil radiator

1. The oil radiator must be designed to dissipate approx 30 kW (28.43 BTU/s) of thermal energy at take-off performance.
2. Weight: max. 0.82 kg (1.8 lb) for oil radiator “extra large”

All measures must be implemented and confirmed by at least one of the following persons or organizations:

• ROTAX® - Airworthiness representatives
• ROTAX® - Authorized Distributors or their independent Service Centers
• Persons approved by the respective Aviation Authority
• Persons with approved qualifications for the corresponding engine types. Only authorized persons (iRMT, Level Heavy Maintenance) are entitled to carry out this work

The illustrations in this document show the typical construction. They may not represent full detail or the exact shape of the parts which have the same or similar function. Exploded views are not technical drawings and are for reference only. For specific detail, refer to the current documents of the respective engine type.