# Proposed AD FAA-2013-0978: the Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2014-17-05
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 6, 2013, 78 FR 73460
- Comments due: January 21, 2014
- Became: [AD 2014-17-05](https://openairdocs.org/ad/2014-17-05)
- Docket: FAA-2013-0978 (https://www.regulations.gov/docket/FAA-2013-0978, where comments are filed)
- Project: 2013-NM-120-AD
- FR document: 2013-29136
- Official PDF: https://openairdocs.org/files/sha256/40/af/40afe9598da99dcfbffe61b8251540e64b7c624e4e2929050249f25cc0ea40b3 (from https://www.govinfo.gov/content/pkg/FR-2013-12-06/pdf/2013-29136.pdf)
- Federal Register: https://www.federalregister.gov/documents/2013/12/06/2013-29136/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2A15956CA95BDDF786257C39004889E2.0001
- Page: https://openairdocs.org/proposed/FAA-2013-0978

## Summary

We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 767-400ER series airplanes. This proposed AD was prompted by reports of turbine wheel bursts in the air driven pump (ADP) turbine gearbox assembly (TGA), which resulted in the release of high energy fragments. This proposed AD would require replacing the existing ADP TGA with an improved ADP TGA. We are proposing this AD to prevent fragments from an uncontained turbine wheel burst penetrating the fuselage and striking passengers, or penetrating the wing-to-body fairing and striking ground handling or maintenance personnel, causing serious injury.

## Notices in this docket

- Dec 6, 2013: Notice of proposed rulemaking (NPRM). (first notice), FR document 2013-29136, comments due Jan 21, 2014 (https://www.federalregister.gov/documents/2013/12/06/2013-29136/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.