# Proposed AD FAA-2010-0376: The Boeing Company Model 777-200, - 200LR, -300, and -300ER Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2010-23-15
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 8, 2010, 75 FR 17889
- Comments due: May 24, 2010
- Became: [AD 2010-23-15](https://openairdocs.org/ad/2010-23-15)
- Docket: FAA-2010-0376 (https://www.regulations.gov/docket/FAA-2010-0376, where comments are filed)
- Project: 2009-NM-267-AD
- FR document: 2010-7946
- Official PDF: https://openairdocs.org/files/sha256/83/07/830783dd8eecc70955a1fc9dc6ecafb22f3a14c70415f8498693fb92cac306c1 (from https://www.govinfo.gov/content/pkg/FR-2010-04-08/pdf/2010-7946.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/04/08/2010-7946/airworthiness-directives-the-boeing-company-model-777-200--200lr--300-and--300er-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/84BE336C0196EEF0862576FF004C086A.0001
- Page: https://openairdocs.org/proposed/FAA-2010-0376

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Model 777-200, -200LR, -300, and -300ER series airplanes. This proposed AD would require removing and repairing the sealant at the four lower corners of the wing center section and the four lower t- chord segment gaps on each side of the wing center section. This proposed AD results from reports of fuel leakage from the center tank. We are proposing this AD to detect and correct improperly applied sealant, which could result in the disbonding and displacing of sealant, and consequent fuel leaks. On the ground, uncontained fuel leakage could result in pooling, and pooling combined with an ignition source could result in a fire.

## Notices in this docket

- Apr 8, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-7946, comments due May 24, 2010 (https://www.federalregister.gov/documents/2010/04/08/2010-7946/airworthiness-directives-the-boeing-company-model-777-200--200lr--300-and--300er-series-airplanes)

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