# Proposed AD FAA-2007-28689: Trimble or FreeFlight Systems 2101 I/O Approach Plus Global Positioning System (GPS) Navigation Systems

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2009-05-08
- Products: Trimble or FreeFlight Systems
- Product type: Appliance
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 13, 2007, 72 FR 38532
- Comments due: September 11, 2007
- Became: [AD 2009-05-08](https://openairdocs.org/ad/2009-05-08)
- Docket: FAA-2007-28689 (https://www.regulations.gov/docket/FAA-2007-28689, where comments are filed)
- Project: 2006-SW-17-AD
- FR document: E7-13606
- Official PDF: https://openairdocs.org/files/sha256/8b/30/8b30279cb0eaa349b2a27db152ea06a8065791614eb94856f99838a7f178dd80 (from https://www.govinfo.gov/content/pkg/FR-2007-07-13/pdf/E7-13606.pdf)
- Federal Register: https://www.federalregister.gov/documents/2007/07/13/E7-13606/airworthiness-directives-trimble-or-freeflight-systems-2101-io-approach-plus-global-positioning
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/85E057C6F50BF89C862573170049A97C.0001
- Page: https://openairdocs.org/proposed/FAA-2007-28689

## Summary

This document proposes adopting a new airworthiness directive (AD) for the Trimble or FreeFlight Systems 2101 I/O Approach Plus global positioning system (GPS) navigation system (2101 I/O Approach Plus system). The AD would require a software upgrade for this system. This proposal is prompted by an incident that led to the discovery of several annunciation errors with the 2101 I/O Approach Plus system. The actions specified by the proposed AD are intended to prevent a pilot from making an unsafe decision based on erroneous information provided by the 2101 I/O Approach Plus system, which could result in loss of control of the aircraft.

## Notices in this docket

- Jul 13, 2007: Notice of proposed rulemaking (NPRM). (first notice), FR document E7-13606, comments due Sep 11, 2007 (https://www.federalregister.gov/documents/2007/07/13/E7-13606/airworthiness-directives-trimble-or-freeflight-systems-2101-io-approach-plus-global-positioning)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.