# Proposed AD FAA-2004-18774: McDonnell Douglas Model DC-9-10, -20, -30, -40, and -50 Series Airplanes; and Model DC-9-81 (MD-81) and DC-9-82 (MD-82) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-07-03
- Products: McDonnell Douglas
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 5, 2004, 69 FR 47388
- Comments due: September 20, 2004
- Became: [AD 2005-07-03](https://openairdocs.org/ad/2005-07-03)
- Docket: FAA-2004-18774 (https://www.regulations.gov/docket/FAA-2004-18774, where comments are filed)
- Project: 2003-NM-212-AD
- FR document: 04-17859
- Official PDF: https://openairdocs.org/files/sha256/29/80/298072b9e25953b75cdd4669ec52a5ea428635c1adff9e6f7872b77130e24f86 (from https://www.govinfo.gov/content/pkg/FR-2004-08-05/pdf/04-17859.pdf)
- Federal Register: https://www.federalregister.gov/documents/2004/08/05/04-17859/airworthiness-directives-mcdonnell-douglas-model-dc-9-10--20--30--40-and--50-series-airplanes-and
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/11F1417365DF5B2586256EE7005218CB.0001
- Page: https://openairdocs.org/proposed/FAA-2004-18774

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain McDonnell Douglas Model DC-9-10, -20, -30, -40, and -50 series airplanes; and Model DC-9-81 (MD-81) and DC-9-82 (MD-82) airplanes. This proposed AD would require repetitive detailed inspections of the upper and lower caps of the rear spar of the left and right wings, and corrective action if necessary. This proposed AD also provides an optional modification that would end the repetitive inspections. This proposed AD is prompted by reports of fatigue cracks in the upper and lower caps of the wing spar. We are proposing this AD to detect and correct fatigue cracking in the upper and lower caps of the rear spar of the left and right wings, which could result in structural failure of the wings.

## Notices in this docket

- Aug 5, 2004: Notice of proposed rulemaking (NPRM). (first notice), FR document 04-17859, comments due Sep 20, 2004 (https://www.federalregister.gov/documents/2004/08/05/04-17859/airworthiness-directives-mcdonnell-douglas-model-dc-9-10--20--30--40-and--50-series-airplanes-and)

---
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.