COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Radio Communication and Navigation Equipment AD/RAD/60 Amdt 1 GNS-XLS/GNS-XL Warning Placard 1/98 Applicability: All aircraft fitted with ALLIED SIGNAL AVIONICS INC (GLOBAL WULFBERG) global positioning systems (GPS) Flight Management Systems Model GNS-XLS and GNS-XL Part No. 17960-0102-XXXX and Part No. 18355-0101-XXXX. Note: This equipment is fitted to but not limited to: British Aerospace, Ltd, Model 146-100A and 146-200A Cessna Aircraft Corporation, Model 525, 550 and 560 Dassault Aviation, Mystere-Falcon 20 and 50 Avions Marcel Dassault, Falcon 10 Gulfstream Aerospace, Models G-1159 (GII) and G-1159A (GIII) Raytheon Corporate Jets, Hawker 800 Israel Aircraft Industries, Ltd, Model 1124 and 1125 Sabreliner Corporation, Model NA-65 Learjet Inc, Model 35 Jetstream Aircraft Ltd, Model 4101 Requirement: Determine the modification status of the installed software in accordance with Allied Signal Software Bulletin SWB GNS-XL-SW1 or SWB GNS-XLS-SW1. If software modification 2 is installed no further action is required, otherwise either: 1. Fabricate a placard, with the following words in letters at least 2.5mm (0.10 inches) in height and install the placard in clear view of the pilot on the instrument panel: GPS NPA LIMITED TO TRAINING IN DAY VMC ONLY or b. Install software modification number 2 in accordance with Allied Signal Software Bulletin SWB GNS-XL-SW1 or SWB GNS-XLS-SW2. Note: FAA AD 97-05-03 Amdt 39-9947 refers. Installation of Software Modification number 2 comprises terminating action for this AD, and the placard, if installed, can be removed when Software Modification number 2 is installed. Compliance: Prior to 27 February 1998. This amendment becomes effective on 1 January 1998. COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Background: FAA has reported that the GNS-XLS or GNS-XL may generate misleading information during non-precision GPS approaches or Overlay approaches due to software limitations. Allied Signal has developed a modification which is an acceptable means of compliance for this AD. The original issue of this airworthiness directive became effective on 16 April 1997.