Coolant overflow bottle for ROTAX Aircraft Engines

Coolant overflow bottle for ROTAX Aircraft Engines
Coolant overflow bottle for ROTAX Aircraft Engines

The overflow bottle part of the Engine Type Design. The is part of the cooling system on aircraft-side and not a Overflow bottle has been tested and released by BRP-Rotax, but it is not certified. The correct function in conjunction with the entire system and the certification of the overflow bottle is the responsibility of the aircraft manufacturer and must be carried out jointly with the aircraft.

Labor time and credit
Estimated labor hours: Engine installed in the aircraft labor time will depend on airframe installation and therefore no estimate is available from the engine manufacturer.

SERVICE INSTRUCTION
Material- cost and availability
Price and availability will be provided on request by ROTAX® Authorized Distributors or their independent Service Centers.

Parts requirement
Part no. Qty/engine Description Application
922327 1 Overflow bottle with cap  Cooling system
242213 1 Hex. nut M6 (optional) Overflow bottle cap vent
940557 1 Hose nipple M6 (optional) Overflow bottle cap vent

Special tooling/lubricants- /adhesives- /sealing compounds
Price and availability will be supplied on request by ROTAX® Authorized Distributors or their independent Service Centers:

Description Qty/engine Part no. Application
LOCTITE® 243 Green as required 899789 Overflow bottle cap vent
Drill bit 6 mm (0.236 in.) 1 - Overflow bottle cap vent

Accomplishment/Instructions
ROTAX® reserves the right to make any amendments to existing documents which might become necessary due to this standardization, at the time of next revision or issue
NOTE: Before maintenance, review the entire documentation to make sure you have a complete understanding of the procedure and requirements.

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

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

Instructions
An OPTIONAL hose nipple connection for overflow vent, can be installed by completing the following steps:

Step Procedure
1 Drill out the existing cap vent hole from 2.5 mm (0.04 in.) as supplied to 6 mm (0.236 in.)
2 Apply LOCTITE® 243 to the threads of the hose nipple (3).
3 Insert hose nipple (3) into the cap vent hole.
4 Install nut (1) onto the hose nipple (3). Tightening torque 5 Nm (44 in.lb).
5 Screw the cap (2) onto the overflow bottle
6 Attach the hose (5) with a hose clamp (4).
7 Make sure the hose (5) has no kinks. Rout it overboard and secure.
  • Restore aircraft to original operating configuration
  • Connect negative terminal of aircraft battery

Refer to the relevant Installation Manual (IM) for overflow bottle installation instructions and appropriate hose selection for use between the overflow bottle and the expansion tank.

Non-compliance can result in serious injuries or death! A soft-walled hose is not suitable as it may collapse and cause cooling system failure.