COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Instruments and Automatic Pilots AD/INST/38 LITEF GmbH LCR-88 Attitude and Heading Reference System 6/94 Applicability: Litef GmbH LCR-88 Attitude Heading Reference Units (AHRU) with the following part numbers, having Software Version 0202 incorporated: 121319-0011, 121319-0111, 121319-1010, and 121319-1032. Requirement: Reprogramme the AHRU computer module software in accordance with Litef GmbH Service Bulletin 121319-34-003 Revision 1 dated 22 October 1993. Note: German LBA AD 93-240 Litef refers. Compliance: Prior to 31 August 1994. Background: Litef has advised that Software Version 0202 sends incorrect scaling of angular rate outputs, reprogramming of the software as required by this Directive, corrects this anomaly.