# Proposed AD FAA-2004-19140: Boeing Model 757 Series Airplanes Powered by Pratt & Whitney Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2006-07-21
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 21, 2004, 69 FR 56375
- Comments due: November 5, 2004
- Became: [AD 2006-07-21](https://openairdocs.org/ad/2006-07-21)
- Docket: FAA-2004-19140 (https://www.regulations.gov/docket/FAA-2004-19140, where comments are filed)
- Project: 2004-NM-84-AD
- FR document: 04-21176
- Official PDF: https://openairdocs.org/files/sha256/a1/01/a101505da3ef184cf91f40cd90bd584f565c9d64a8823c3f2dc1b800c5fae59f (from https://www.govinfo.gov/content/pkg/FR-2004-09-21/pdf/04-21176.pdf)
- Federal Register: https://www.federalregister.gov/documents/2004/09/21/04-21176/airworthiness-directives-boeing-model-757-series-airplanes-powered-by-pratt-and-whitney-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3D94369214FA771786256F16004EB66E.0001
- Page: https://openairdocs.org/proposed/FAA-2004-19140

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Boeing Model 757 series airplanes. This proposed AD would require repetitive inspections for corrosion and cracking of the midspar fittings in the nacelle struts, and corrective actions if necessary. This action also provides an optional terminating action for the repetitive inspections. This proposed AD is prompted by reports of corrosion and cracking on midspar fittings on the nacelle struts of several Boeing Model 757 series airplanes. We are proposing this AD to detect and correct cracking in the midspar fittings of the nacelle struts, consequent reduced structural integrity of the struts, and possible separation of an engine and strut from the airplane.

## Notices in this docket

- Sep 21, 2004: Notice of proposed rulemaking (NPRM). (first notice), FR document 04-21176, comments due Nov 5, 2004 (https://www.federalregister.gov/documents/2004/09/21/04-21176/airworthiness-directives-boeing-model-757-series-airplanes-powered-by-pratt-and-whitney-engines)

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