AD 2021-08-07

final rule
Data completeness: 80%

Airworthiness Directives; Rockwell Collins, Inc., Global Positioning Systems

AD Number
2021-08-07
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Docket No. FAA-2020-0915
FR Citation
86 FR 17902

Unsafe Condition

The software error in the GPS-4000 produces both horizontal and vertical position inaccuracies in the affected region.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Remove GPS-4000S GPS P/N 822-2189-100 from service without requiring replacement with a specific P/N GPS.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

Within 24 months after the effective date of the AD.

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

Rockwell Collins GPS-4000S GPS installed on airplanes, P/N 822-2189-100.

AI-generated summary from the source AD text. Verify against the official source before acting.

Source: Official FAA Source ↗

Retrieved: Apr 4, 2026

Rights: U.S. Government Public Domain

This site is not affiliated with or endorsed by the FAA. Always verify with official sources.

View Official Source ↗