# Proposed AD FAA-2018-0977: Rockwell Collins, Inc. Flight Management Systems

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2020-10-05
- Products: Rockwell Collins
- Product type: Appliance
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 6, 2018, 83 FR 62736
- Comments due: January 22, 2019
- Became: [AD 2020-10-05](https://openairdocs.org/ad/2020-10-05)
- Docket: FAA-2018-0977 (https://www.regulations.gov/docket/FAA-2018-0977, where comments are filed)
- FR document: 2018-26253
- Official PDF: https://openairdocs.org/files/sha256/1b/2e/1b2e9b537ba2d4d9c6dcfa7498acd7aa2a7fcb8ae357b4c6b8f29d67309057d4 (from https://www.govinfo.gov/content/pkg/FR-2018-12-06/pdf/2018-26253.pdf)
- Federal Register: https://www.federalregister.gov/documents/2018/12/06/2018-26253/airworthiness-directives-rockwell-collins-inc-flight-management-systems
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/391C5D7BBC1725148625835B0058147C.0001
- Page: https://openairdocs.org/proposed/FAA-2018-0977

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Rockwell Collins, Inc. (Rockwell Collins) flight management systems (FMS) installed on airplanes. This proposed AD was prompted by reports of the flight management computer (FMC) software issuing incorrect turn commands when the altitude climb field is edited or the temperature compensation is activated on the FMS control display unit. This proposed AD would require disabling the automatic temperature compensation feature of the FMS through the configuration strapping units (CSU) and revising the airplane flight manual (AFM) Limitations section. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Dec 6, 2018: Notice of proposed rulemaking (NPRM). (first notice), FR document 2018-26253, comments due Jan 22, 2019 (https://www.federalregister.gov/documents/2018/12/06/2018-26253/airworthiness-directives-rockwell-collins-inc-flight-management-systems)

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