The oil tank assy. BIG might not be a pa a PAC part has been then tested and released by BRP-Rotax, but it might rt of the Engine Type Design. Such 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 Service Instruction-PAC must be observed and complied with:
- SI-PAC-013, title “Oil system connectors for ROTAX® Aircraft Engines“, current issue.
- SI-PAC-014, title “Oil radiator sets for ROTAX® Aircraft Engines”, current issue.
Reason
In the course of product maintenance and expansion of our spare parts program, oil tank assy. with large capacity (BIG) is available.
| Part number | Description | Application |
| 656222 | Oil tank assy. UNF BIG | Engine lubrication |
| 974650 | Oil tank cover, wihout venting big tank | Oil tank |
| 230150 | Sealing ring A 10x14 | Oil tank |
| 241408 | Plug screw M12x12 | Oil tank |
| 641733 | Plug screw M10X1 DIN 908-A2-70 | Oil tank |
| 250010 | Gasket ring C12x18 | Oil tank |
| 850491 | O-ring 145x6 | Oil tank |
| 951817 | Profile clamp 163 | Oil tank |
| 956154 | Oil dipstick big | Oil tank |
| 656861 | Partition 2 | Oil tank |
| 956205 | Baffle insert (Screen) | Oil tank |
Installation - related information
Refer to the current version of the Installation Manual (IM) chapter 79-00-00 for details such as oil tank position, oil line specifications and validation of installation.
| System limit | Min. | Max. |
| Angular deviation | ||
| Tank height position in relation to engine (measured from the middle of profile clamp) | - 40 mm (- 1.57 in.) |
360 mm (14.17 in.) |
Non-compliance can result in serious injuries or death! At higher positioning of the oil tank oil might leak through clearances at bearings back into crankcase during longer periods of engine stop. Oil tank may empty and all oil will be in the crankcase. If fitted too low it might happen that the oil filter will be drained. In that case oil pressure is too low for the first seconds after starting the engine.
- The oil tank must be installed in a low-vibration position and not on the engine directly
- The oil tank cover assy. (oil tank cup) and the plug screw (drain screw) must be easily accessible
Technical data
The oil tank assy. BIG consists of a taller oil tank that has more volume than the standard version, see Fig. 1 for dimensions. Ensure that the aircraft installation allows the taller oil tank assy.
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| Oil tank assy. type | Oil volume |
| “BIG” | 4.3 liters (1.14 gal (US))* |
*Approximate oil tank volume when filled to “Max” dipstick level.
Oil tank assy. “BIG” (which is taller th used in conjunction with matching baffle insert BIG part no. 956205, and an oil tank assy. “Standard”) must be oil tank cover assy. UNF BIG.