# Proposed AD FAA-2006-25850: McDonnell Douglas Model MD-11 and -11F Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2007-07-04
- Products: McDonnell Douglas
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 20, 2006, 71 FR 54941
- Comments due: November 6, 2006
- Became: [AD 2007-07-04](https://openairdocs.org/ad/2007-07-04)
- Docket: FAA-2006-25850 (https://www.regulations.gov/docket/FAA-2006-25850, where comments are filed)
- Project: 2006-NM-128-AD
- FR document: 06-7945
- Official PDF: https://openairdocs.org/files/sha256/f0/cc/f0cc40804abc9a3cbdd8052fc9990c28cd348a209461af1214eaf5d56222df4f (from https://www.govinfo.gov/content/pkg/FR-2006-09-20/pdf/06-7945.pdf)
- Federal Register: https://www.federalregister.gov/documents/2006/09/20/06-7945/airworthiness-directives-mcdonnell-douglas-model-md-11-and--11f-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/299A3F024175E40F862571EF0056D091.0001
- Page: https://openairdocs.org/proposed/FAA-2006-25850

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all McDonnell Douglas Model MD-11 and -11F airplanes. This proposed AD would require revising the maintenance inspection program that provides for inspection of principal structural elements (PSEs) and replacement of safe-life parts, to incorporate a new revision to the MD-11 Airworthiness Limitations Instructions. The revision would reduce inspection intervals for fatigue cracking of certain PSEs, and expand the inspection area for a certain other PSE. This proposed AD results from a revised damage tolerance analysis. We are proposing this AD to detect and correct fatigue cracking of certain PSEs, which could adversely affect the structural integrity of the airplane.

## Notices in this docket

- Sep 20, 2006: Notice of proposed rulemaking (NPRM). (first notice), FR document 06-7945, comments due Nov 6, 2006 (https://www.federalregister.gov/documents/2006/09/20/06-7945/airworthiness-directives-mcdonnell-douglas-model-md-11-and--11f-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.