# Proposed AD FAA-2005-20799: Boeing Model 727 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-16-07
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 4, 2005, 70 FR 16979
- Comments due: May 19, 2005
- Became: [AD 2005-16-07](https://openairdocs.org/ad/2005-16-07)
- Docket: FAA-2005-20799 (https://www.regulations.gov/docket/FAA-2005-20799, where comments are filed)
- Project: 2004-NM-264-AD
- FR document: 05-6577
- Official PDF: https://openairdocs.org/files/sha256/ea/09/ea0907cfeea21a4a53e915b9b22ea2c6797a0118e342c37fb3af1fbd0ef45d6e (from https://www.govinfo.gov/content/pkg/FR-2005-04-04/pdf/05-6577.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/04/04/05-6577/airworthiness-directives-boeing-model-727-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/02C37ADE76F3348386256FD90055538F.0001
- Page: https://openairdocs.org/proposed/FAA-2005-20799

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Boeing Model 727 airplanes. This proposed AD would require determining whether any float switches are installed in the fuel tanks, and corrective actions if necessary. This proposed AD is prompted by reports of contamination of the fueling float switch by moisture or fuel, and chafing of the float switch wiring against the fuel tank conduit. We are proposing this AD to prevent such contamination and chafing, which could present an ignition source inside the fuel tank that could cause a fire or explosion.

## Notices in this docket

- Apr 4, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-6577, comments due May 19, 2005 (https://www.federalregister.gov/documents/2005/04/04/05-6577/airworthiness-directives-boeing-model-727-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.