1AD/RAD/77 Amdt 1 - Goodrich Avionics Systems TAWS8000

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AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/RAD/77 and issues the following AD under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

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Radio Communication and Navigation Equipment

AD/RAD/77

Amdt 1

Goodrich Avionics Systems TAWS8000 8/2004

Applicability: Goodrich Avionics Systems, Inc. TAWS8000 Terrain Awareness Warning System (TAWS), part number (P/N) 805-18000-001, that incorporates hardware "Mod None", "Mod A" or "Mod B".

Note 1: These systems are known to be installed on, but not limited to the following aeroplanes:

Manufacturer Manufacturer

Cessna Aircraft Company

Dassault Aviation

Gulfstream Aerospace LP/Israel Aircraft Industries

Raytheon Aircraft Company Saberliner Corporation

The New Piper Aircraft Inc

421, 500, 501, 525, 525A, 550, 551, 650

and S550

Mystère-Falcon 20 series

1125 Westwind Astra

100, 200, 300, 400A and F90 NA-265

PA-42-1000

Requirement: 1. Inspect the TAWS8000 TAWS installation in accordance with Goodrich Avionics Systems, Inc. Service Memo SM #134, dated 2 May 2003 or SM #134 revised 9 July 2003 and the applicable installation manual, to determine if both the TAWS8000 TAWS and any other device are connected to the same baro set potentiometer.

2. If, as a result of the Requirement 1 inspection, both the TAWS8000 TAWS and any other device are found to be connected to the same baro set potentiometer, remove the TAWS8000 TAWS, cap and stow the connecting wires in accordance with SM #134 and the applicable installation manual.

Note 2: This Requirement applies to TAWS8000 TAWS with "Mod None", "Mod A" or "Mod B" hardware installed, not to systems with “Mod C” hardware. TAWS8000 units with “Mod C” hardware may be fitted in lieu of "Mod None", "Mod A" or "Mod B" units in accordance with Goodrich Avionics Systems Alert Service Bulletin #A117 dated 9 July 2003.