# Proposed AD FAA-2009-0430: Boeing Model 777-200 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2010-26-01
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 7, 2009, 74 FR 21284
- Comments due: June 22, 2009
- Became: [AD 2010-26-01](https://openairdocs.org/ad/2010-26-01)
- Docket: FAA-2009-0430 (https://www.regulations.gov/docket/FAA-2009-0430, where comments are filed)
- Project: 2008-NM-148-AD
- FR document: E9-10613
- Official PDF: https://openairdocs.org/files/sha256/57/0f/570fc8a3e0bfdd362458c4f6ce133a9a57af69e9c3e926f05d4800f4f200c7b7 (from https://www.govinfo.gov/content/pkg/FR-2009-05-07/pdf/E9-10613.pdf)
- Federal Register: https://www.federalregister.gov/documents/2009/05/07/E9-10613/airworthiness-directives-boeing-model-777-200-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CD77E0F5CC9A188E862575AF006D6D8D.0001
- Page: https://openairdocs.org/proposed/FAA-2009-0430

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Boeing Model 777-200 series airplanes. This proposed AD would require installing a new insulation blanket on the latch beam firewall of each thrust reverser (T/R) half. This proposed AD results from an in-flight shutdown due to an engine fire indication; an under-cowl engine fire was extinguished after landing. The cause of the fire was uncontained failure of the starter in the engine core compartment; the fire progressed into the latch beam cavity and was fueled by oil from a damaged integrated drive generator oil line. We are proposing this AD to prevent a fire from entering the cowl or strut area, which could weaken T/R parts and result in reduced structural integrity of the T/R, possible separation of T/R parts during flight, and consequent damage to the airplane and injury to people or damage to property on the ground.

## Notices in this docket

- May 7, 2009: Notice of proposed rulemaking (NPRM). (first notice), FR document E9-10613, comments due Jun 22, 2009 (https://www.federalregister.gov/documents/2009/05/07/E9-10613/airworthiness-directives-boeing-model-777-200-series-airplanes)

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