# Proposed AD FAA-2014-0926: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2015-14-06
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 17, 2014, 79 FR 75100
- Comments due: February 2, 2015
- Became: [AD 2015-14-06](https://openairdocs.org/ad/2015-14-06)
- Docket: FAA-2014-0926 (https://www.regulations.gov/docket/FAA-2014-0926, where comments are filed)
- Project: 2014-NM-085-AD
- FR document: 2014-29484
- Official PDF: https://openairdocs.org/files/sha256/60/6d/606dc61212dad175de3ef5e0be3ff1fbd11722d691fb8215ab06d1a813673a95 (from https://www.govinfo.gov/content/pkg/FR-2014-12-17/pdf/2014-29484.pdf)
- Federal Register: https://www.federalregister.gov/documents/2014/12/17/2014-29484/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/94EB4818E4A46EEB86257DB10048A9E9.0001
- Page: https://openairdocs.org/proposed/FAA-2014-0926

## Summary

We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 747-8 and 747-8F airplanes. This proposed AD was prompted by an analysis, which determined that in a limited flight envelope with specific conditions, divergent flutter could occur during a high g-load maneuver in combination with certain system failures. This proposed AD would require replacing the lateral control electronic (LCE) modules, replacing the inboard elevator power control packages (PCPs), installing new external compensators for the PCPs, and revising the maintenance or inspection program. We are proposing this AD to prevent certain system failures from resulting in divergent flutter, and subsequent loss of continued safe flight and landing.

## Notices in this docket

- Dec 17, 2014: Notice of proposed rulemaking (NPRM). (first notice), FR document 2014-29484, comments due Feb 2, 2015 (https://www.federalregister.gov/documents/2014/12/17/2014-29484/airworthiness-directives-the-boeing-company-airplanes)

---
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.