# Proposed AD FAA-2007-0227: Boeing Model 727 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2008-08-02
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 26, 2007, 72 FR 65913
- Comments due: January 10, 2008
- Became: [AD 2008-08-02](https://openairdocs.org/ad/2008-08-02)
- Docket: FAA-2007-0227 (https://www.regulations.gov/docket/FAA-2007-0227, where comments are filed)
- Project: 2007-NM-159-AD
- FR document: E7-22939
- Official PDF: https://openairdocs.org/files/sha256/8c/18/8c18b27f69d575c93e4e308f468e989ec1bb64238e17633f35e80ccf9fd0f708 (from https://www.govinfo.gov/content/pkg/FR-2007-11-26/pdf/E7-22939.pdf)
- Federal Register: https://www.federalregister.gov/documents/2007/11/26/E7-22939/airworthiness-directives-boeing-model-727-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7B4186BED16C88BA8625739F0060EC30.0001
- Page: https://openairdocs.org/proposed/FAA-2007-0227

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Boeing Model 727 airplanes. This proposed AD would require repetitive inspections for cracking or corrosion of the threaded end of the lower segment of the main landing gear (MLG) side strut, and corrective actions if necessary. This proposed AD also would require prior or concurrent inspection for cracking or corrosion of the threads and thread relief area of the lower segment, corrective action if necessary, and re-assembly using corrosion inhibiting compound. This proposed AD results from reports of the threads cracking on the MLG side strut lower segment. We are proposing this AD to prevent a fractured side strut, which could result in collapse of the MLG.

## Notices in this docket

- Nov 26, 2007: Notice of proposed rulemaking (NPRM). (first notice), FR document E7-22939, comments due Jan 10, 2008 (https://www.federalregister.gov/documents/2007/11/26/E7-22939/airworthiness-directives-boeing-model-727-airplanes)

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