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SERVICE 

BULLETIN 

Czech Sport Aircraft a.s. 

Na Záhonech 212, 

686 04   Kunovice 

Czech Republic 

[email protected] 

No.:   SB-SC-055 
Date: 2018-08-20 

Rev.: - 

Page: 1 of 25 

Date: - 

 

MODEL 

AFFECTED: 

SportCruiser 

SUBJECT: 

Installation of  Fuel return line 

AIRCRAFT 

AFFECTED: 

All SportCruiser aircraft up to S/N 09SC273 inclusive without fuel return line 

installed, as applicable.

 

COMPLIANCE: 

Apply this Service Bulletin upon the next scheduled annual inspection or till 

May 31, 2019, at the latest.

 

DESCRIPTION: 

This Service Bulletin follows the Safety Alert / Safety Directive No. SA-SC-006 dated October 16, 2017. 

This Service Bulletin contains instructions for mandatory fuel return line installation that is required to be 

incorporated within the aircraft fuel system design as per the Rotax Installation Manual 912 Series, the latest 

revision, Chapter 73-00-00, Fuel system. Application of this Service Bulletin is mandatory for all SportCruiser 

aircraft without the fuel return line installed. For checking the fuel return line installation on the respective 

aircraft, refer to the SA-SC-006. The Service Alert No. SA-SC-006 remains in effect and mandatory for all 

respective SportCruiser aircraft without fuel return line installed until this Service Bulletin accomplishment. 

 

AUTHORISATION TO PERFORM: 

Repairman (LS-M) or Mechanic (A&P), Aircraft Maintenance Organization  

 

REASON: 

Implementation of the fuel return line is required by the Rotax Company. The purpose of the fuel return line 

is to bleed off any vapors that may form within the fuel system that could cause vapor lock resulting in 

a possible loss of engine power.    

 

 

MANPOWER: 

Approximately 30 manhours. 

 

SPECIAL TOOLS AND TEST EQUIPMENT: 

 

Direct drilling machine (chuck up to a diameter of 10 mm) 

 

Corner drilling machine (chuck up to a diameter of 10 mm) 

 

Riveting pliers with a rotary head for pop rivets 

 

Pliers for cleco fasteners 

 

Drill bit, diameter of 2.4 mm ( .094 inch) 

 

Drill bit, diameter of 4.1 mm ( .161 inch) 

 

Drill bit, diameter of 6 mm ( .240 inch) 

 

Drill bit, diameter of 9 mm ( .360 inch) 

 

Step drill bit 3/4 inch or reamer 3/4 inch 

 

Cleco fasteners, diameter of 2.4 mm (10 pcs) 

 

Cleco fasteners, diameter of 4 mm (4 pcs) 

 

Hot air gun 

 

Vacuum cleaner designed for working in an explosive environment 

 

Portable light designed for working in an explosive environment 

 

Telescopic mirror 

 

Test equipment for the test of fuel system installation leakage 

 

Test equipment for the test of pitot-static system leakage 

 

Содержание SportCruiser

Страница 1: ...ns in effect and mandatory for all respective SportCruiser aircraft without fuel return line installed until this Service Bulletin accomplishment AUTHORISATION TO PERFORM Repairman LS M or Mechanic A...

Страница 2: ...060 512K2101 5 m Hose thermofit CGPT 25 4 12 7 4 FSP yellow 512O2122 0 4 m Pyrojacket 13 MM 66501001 2 m Grommet 13 X 1 930 913011 3251A131 2 pcs Cable tie CB 200 3 5 NATUR 3331A003 20 pcs Pop rivet W...

Страница 3: ...exception of the fastening elements of holes must be ensured Warning During the works performed according to this Service Bulletin it is necessary strictly to keep the rules for working in an explosiv...

Страница 4: ...nk and from the wing see Fig 03 Caution It is necessary to mark the fuel gauge contacts and the appropriate plug contacts in such a way that after the reinstallation of the fuel gauge to the tank it i...

Страница 5: ...czechsportaircraft com No SB SC 055 Date 2018 08 20 Rev Page 5 of 25 Date 9 On the left wing on rib No 1 and rib No 2a measure the position of the holes with a diameter of 4 1 mm 161 inch Drill the ho...

Страница 6: ...om No SB SC 055 Date 2018 08 20 Rev Page 6 of 25 Date 10 In the left wing perform the following works a Carefully remove the sticker from the appropriate area of the right side of the tank if the stic...

Страница 7: ...e bolt of the jig is inserted into the technological hole made in the nose part of the rib No 4 and that the area of the jig with drilled holes 2 4 mm was pressed against the area of the right side of...

Страница 8: ...honech 212 686 04 Kunovice Czech Republic office czechsportaircraft com No SB SC 055 Date 2018 08 20 Rev Page 8 of 25 Date c Drill two holes 2 4 mm in the right side of the fuel tank according to the...

Страница 9: ...le 2 4 mm intended for the sleeve of the connection CE0271N to be drilled to 6 0 mm and then to 9 0 mm then deburr the hole see Fig 13 e Insert the connection CE0271N see Fig 14 into the hole made acc...

Страница 10: ...vice Czech Republic office czechsportaircraft com No SB SC 055 Date 2018 08 20 Rev Page 10 of 25 Date f According to the holes in the connection flange drill the 3 remaining holes 2 4 mm in the right...

Страница 11: ...Install the CE0271N connection back on the right side of the fuel tank and fasten it to the rib by cleco fasteners Check the position of the connection pipe through the hole in the fuel tank intended...

Страница 12: ...the rivets and the appropriate areas on the connection flange and on the right side of left wing fuel tank by means of the agent recommended by the manufacturer of the used sealants Apply a layer of...

Страница 13: ...hsportaircraft com No SB SC 055 Date 2018 08 20 Rev Page 13 of 25 Date On the left side of the cabin partly remove carefully unstick tear off the marked upholstery panel see Fig 21 Remove the panel in...

Страница 14: ...f cabin measure the position of 4 holes having a diameter of 4 1 mm 161 inch When measuring make sure that the holes are distributed uniformly drill and deburr the holes see Fig 22 15 On the skin of l...

Страница 15: ...the firewall drill and deburr the hole having a diameter of 4 1 mm 161 inch intended for fastening the fuel return line see Fig 26 b Cut the hose of fuel system installation pressure line with the pro...

Страница 16: ...nect the return line hose to the T coupler with the restriction jet by means of hose clamps see Fig 25 d Position the shrinkable hoses on the ends of PYROJACKET hoses see Section 16 b 16 c secure the...

Страница 17: ...ce Czech Republic office czechsportaircraft com No SB SC 055 Date 2018 08 20 Rev Page 17 of 25 Date f Using cable ties attach the hose of fuel return line passing through the cockpit to the longeron r...

Страница 18: ...SERVICE BULLETIN Czech Sport Aircraft a s Na Z honech 212 686 04 Kunovice Czech Republic office czechsportaircraft com No SB SC 055 Date 2018 08 20 Rev Page 18 of 25 Date Fig Fig 28...

Страница 19: ...the fuel installation of the respective airplane includes the flowmeter then the fuel return line must be connected to the discharge line of the mechanical fuel pump behind the mechanical pump and at...

Страница 20: ...e connection located on the right side of the left wing fuel tank and the hose of suction line that is connected to the fuel tank b Connect the test equipment to the hose of venting system of left win...

Страница 21: ...ambient temperature 20 Turn the left wing in such a way that the upper side of wing is located on the assembly supports Measure a needed length of the return fuel hose on the wing cut off the hose blo...

Страница 22: ...SERVICE BULLETIN Czech Sport Aircraft a s Na Z honech 212 686 04 Kunovice Czech Republic office czechsportaircraft com No SB SC 055 Date 2018 08 20 Rev Page 22 of 25 Date Fig 31 Fig 32...

Страница 23: ...to SC AMM 1 0 00 Chapter 9 Fuel system 23 Connect the accumulator to the electrical network of airplane 24 Check the pitot static system tightness according to SC AMM 1 0 00 Chapter 12 Instruments and...

Страница 24: ...com No SB SC 055 Date 2018 08 20 Rev Page 24 of 25 Date 29 On the left side of the cabin stick the partly removed upholstery panel by means of versatile water resistant contact adhesive Using alcohol...

Страница 25: ......

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