Document ID: chunk:federal_register_of_legislation:F2005L00211:body:0:p2
Version: federal_register_of_legislation:F2005L00211
Segment Type: other
Provision Reference: 
Character Range: 2923–4925

iv) Installation Manual Rotax 912 F Series, Chapter 6.1, Operating Limits.
   CHT
   Use of EVANS NPG+                                                                Max 150 Degree C
   Use of Glycol / Water Coolant (50/50) and use of a 1.2 bar pressure vessel cap.  Max 120 Degree C

        v) Installation Manual Rotax 912 S Series, Chapter 7.1, Operating Limits.
   CHT
   Use of EVANS NPG+                                                                Max 135 Degree C
   Use of Glycol / Water Coolant (50/50) and use of a 1.2 bar pressure vessel cap.  Max 120 Degree C

        vi) Installation Manual Rotax 914 F Series, Chapter 8.1, Operating Limits.
   CHT
   Use of EVANS NPG+                                                                Max 135 Degree C
   Use of Glycol / Water Coolant (50/50) and use of a 1.2 bar pressure vessel cap.  Max 120 Degree C

             Note:  Austrian ACG Airworthiness Directive A-2004-004 R1 as approved by EASA reference 2004-12534 dated 22 December 2004 refers.
Compliance:     1. Unless accomplished earlier, before 31 December 2005.

                2. Unless accomplished earlier, before 31 December 2005.
             This Amendment becomes effective on 17 March 2005.
Background:  During operation, conventional coolant liquid (mixture ratio of 50% water and 50% antifreeze) can vaporize or boil under certain circumstances before reaching of the maximum cylinder head temperature.  Loss of cylinder head cooling may lead to engine over temperature, seizure or fire.  This AD addresses the identified unsafe condition associated with engine fire or loss of power.

             The original issue of this AD required changing conventional engine coolant with a new coolant liquid type "Evans NPG+".  This amendment allows use of either coolant with revised maximum CHT Limits.

             The original issue of this AD became effective on 25 November 2004.

James Coyne
Delegate of the Civil Aviation Safety Authority

4 February 2005