# Proposed AD FAA-2005-20347: Boeing Model 737-300, -400, -500, -600, -700, -700C, -800 and -900 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-19-19
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 15, 2005, 70 FR 7687
- Comments due: April 1, 2005
- Became: [AD 2005-19-19](https://openairdocs.org/ad/2005-19-19)
- Docket: FAA-2005-20347 (https://www.regulations.gov/docket/FAA-2005-20347, where comments are filed)
- Project: 2004-NM-226-AD
- FR document: 05-2827
- Official PDF: https://openairdocs.org/files/sha256/8f/6b/8f6b55338c2cdff0982a5835d43727489b49223deaace2ce3011deb26805cb8f (from https://www.govinfo.gov/content/pkg/FR-2005-02-15/pdf/05-2827.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/02/15/05-2827/airworthiness-directives-boeing-model-737-300--400--500--600--700--700c--800-and--900-series
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9CC947C937902D5E86256FA9005D54BB.0001
- Page: https://openairdocs.org/proposed/FAA-2005-20347

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Boeing Model 737-300, -400, -500, -600, -700, -700C, -800 and -900 series airplanes. This proposed AD would require installing an updated version of the operational program software (OPS) in the flight management computers (FMCs), and doing other specified actions. This proposed AD would also require reinstalling software, if necessary. This proposed AD is prompted by one operator reporting FMC map shifts on several Model 737-400 series airplanes with dual FMCs, using OPS version U10.4A. We are proposing this AD to prevent the FMC from displaying the incorrect actual navigation performance value to the flightcrew, which could prevent adequate alerting of a potential navigation error. This condition could result in a near miss with other airplanes or terrain, or collision if other warning systems also fail.

## Notices in this docket

- Feb 15, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-2827, comments due Apr 1, 2005 (https://www.federalregister.gov/documents/2005/02/15/05-2827/airworthiness-directives-boeing-model-737-300--400--500--600--700--700c--800-and--900-series)

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