AD 2003-13-08
Unsafe Condition
TAWS8000 Terrain Awareness Warning System causes altitude errors in other instruments when both the TAWS and any other device are connected to the same baro set potentiometer, potentially leading to an unacceptable attitude error.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the TAWS8000 installation to determine if both the TAWS8000 and any other device are connected to the same baro set potentiometer. Remove any TAWS8000 with such an installation configuration, including capping and stowing the connecting wires. Prohibit future installation of any TAWS8000 that incorporates hardware 'Mod None', 'Mod A', or 'Mod B'.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Goodrich Avionics Systems, Inc. TAWS8000 Terrain Awareness Warning System, part number 805-18000-001, installed in various aircraft models including Cessna 421, 500, 501, 525, 525A, 550, 551, 650, S550; Dassault Mystere-Falcon 20 series; Gulfstream 1125 Westwind Astra; Raytheon 100, 200, 300, 400A, F90; Sabreliner NA-265; and New Piper PA-42-1000, among others.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.