# Proposed AD FAA-2008-0013: Boeing Model 727-200 Series Airplanes Equipped With an Auxiliary Fuel Tank System Installed in Accordance With Supplemental Type Certificate SA1350NM

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2008-07-07
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: January 14, 2008, 73 FR 2204
- Comments due: February 28, 2008
- Became: [AD 2008-07-07](https://openairdocs.org/ad/2008-07-07)
- Docket: FAA-2008-0013 (https://www.regulations.gov/docket/FAA-2008-0013, where comments are filed)
- Project: 2007-NM-230-AD
- FR document: E8-384
- Official PDF: https://openairdocs.org/files/sha256/87/30/8730be52bb4654757f90a4655a1410de9c470d0334a5e4ce6a3882ea4964ac12 (from https://www.govinfo.gov/content/pkg/FR-2008-01-14/pdf/E8-384.pdf)
- Federal Register: https://www.federalregister.gov/documents/2008/01/14/E8-384/airworthiness-directives-boeing-model-727-200-series-airplanes-equipped-with-an-auxiliary-fuel-tank
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F60FAAD43616D39E862573D0005910EF.0001
- Page: https://openairdocs.org/proposed/FAA-2008-0013

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Boeing Model 727-200 series airplanes. This proposed AD would require deactivation of auxiliary fuel tank systems installed in accordance with Supplemental Type Certificate (STC) SA1350NM. This proposed AD results from fuel tank system reviews conducted by the manufacturer that identified potential unsafe conditions for which the manufacturer has not provided corrective actions. We are proposing this AD to prevent the potential of ignition sources inside fuel tanks, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane.

## Notices in this docket

- Jan 14, 2008: Notice of proposed rulemaking (NPRM). (first notice), FR document E8-384, comments due Feb 28, 2008 (https://www.federalregister.gov/documents/2008/01/14/E8-384/airworthiness-directives-boeing-model-727-200-series-airplanes-equipped-with-an-auxiliary-fuel-tank)

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