# Proposed AD FAA-2012-0678: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2012-24-10
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 11, 2012, 77 FR 40832
- Comments due: August 27, 2012
- Became: [AD 2012-24-10](https://openairdocs.org/ad/2012-24-10)
- Docket: FAA-2012-0678 (https://www.regulations.gov/docket/FAA-2012-0678, where comments are filed)
- Project: 2011-NM-285-AD
- FR document: 2012-16962
- Official PDF: https://openairdocs.org/files/sha256/dc/fe/dcfe43de59ef7c68aecb733fd8ad8d59f02b8fa5ccc3a4a67111b56d1decfa66 (from https://www.govinfo.gov/content/pkg/FR-2012-07-11/pdf/2012-16962.pdf)
- Federal Register: https://www.federalregister.gov/documents/2012/07/11/2012-16962/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2753ED70184269DE86257A38004E7AAC.0001
- Page: https://openairdocs.org/proposed/FAA-2012-0678

## Summary

We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 747-400, and -400F series airplanes. This proposed AD was prompted by multiple reports of integrated display unit (IDU) malfunctions and mode control panel (MCP) malfunctions. This proposed AD would require installing new software, replacing the duct assembly with a new duct assembly, making wiring changes, and routing certain wire bundles. We are proposing this AD to prevent IDU malfunctions, which could affect the ability of the flight crew to read primary displays for airplane attitude, altitude, or airspeed, and consequently reduce the ability of the flight crew to maintain control of the airplane.

## Notices in this docket

- Jul 11, 2012: Notice of proposed rulemaking (NPRM). (first notice), FR document 2012-16962, comments due Aug 27, 2012 (https://www.federalregister.gov/documents/2012/07/11/2012-16962/airworthiness-directives-the-boeing-company-airplanes)

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