# Proposed AD FAA-2010-0433: McDonnell Douglas Corporation Model MD- 90-30 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2010-16-11
- Products: McDonnell Douglas
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 26, 2010, 75 FR 21528
- Comments due: June 10, 2010
- Became: [AD 2010-16-11](https://openairdocs.org/ad/2010-16-11)
- Docket: FAA-2010-0433 (https://www.regulations.gov/docket/FAA-2010-0433, where comments are filed)
- Project: 2009-NM-117-AD
- FR document: 2010-9572
- Official PDF: https://openairdocs.org/files/sha256/c2/8b/c28babfe9083b7381b8b3be261e630fc4f3d85fd6f3fb6cbaff5097f3a10dab0 (from https://www.govinfo.gov/content/pkg/FR-2010-04-26/pdf/2010-9572.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/04/26/2010-9572/airworthiness-directives-mcdonnell-douglas-corporation-model-md-90-30-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/52E5BD998F75616A8625771100506D57.0001
- Page: https://openairdocs.org/proposed/FAA-2010-0433

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Model MD-90-30 airplanes. This proposed AD would require inspecting for corrosion of the retract cylinder support fitting for the main landing gear (MLG) and the mating bore for the support fitting in the MLG trunnion fitting and performing corrective actions if necessary, and replacing cadmium-plated retract cylinder support bushings and bearings. This proposed AD results from reports of the retract cylinder support fitting for the MLG failing during gear extension and subsequently damaging the hydraulic system. We are proposing this AD to prevent corrosion and damage that could compromise the integrity of the retract cylinder support fitting for the MLG, which could adversely affect the airplane's safe landing.

## Notices in this docket

- Apr 26, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-9572, comments due Jun 10, 2010 (https://www.federalregister.gov/documents/2010/04/26/2010-9572/airworthiness-directives-mcdonnell-douglas-corporation-model-md-90-30-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.