AD/ALF/6 - Replacement of Fuel By-Pass Valve In Dual Heat Exchanger
1AD/ALF/6 - Replacement of Fuel By-Pass Valve In Dual Heat Exchanger
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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Image unavailable in extracted text AlliedSignal (Lycoming) Turbine Engines - ALF502 and LF507 Series
AD/ALF/6 Replacement of Fuel By-Pass Valve In Dual Heat Exchanger
6/87
Applicability: ALF 502R series which have dual heat exchanger P/N 2-303-491-01 installed.
Requirement: Remove from service or rework dual heat exchangers P/N 2-303-491-01 in accordance with Lycoming SB ALF 502R-79-0151 Rev 1.
Compliance: Unless already accomplished within 100 flights after 4 June 1987 but not later than 31 July 1987.
Background: This Directive is issued requiring the installation of a new fuel by-pass valve which will prevent engine fuel system icing when fuel load temperature at take-off is above 10º C.