# Proposed AD FAA-2008-0269: Boeing Model 737-600, -700, -700C, - 800, and -900 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2010-17-05
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 11, 2008, 73 FR 12910
- Comments due: April 25, 2008
- Became: [AD 2010-17-05](https://openairdocs.org/ad/2010-17-05)
- Docket: FAA-2008-0269 (https://www.regulations.gov/docket/FAA-2008-0269, where comments are filed)
- Project: 2007-NM-320-AD
- FR document: E8-4773
- Official PDF: https://openairdocs.org/files/sha256/70/61/7061562cdc5f4ccf71221381b5985db7f235ded970faa60faec253d777e92a1d (from https://www.govinfo.gov/content/pkg/FR-2008-03-11/pdf/E8-4773.pdf)
- Federal Register: https://www.federalregister.gov/documents/2008/03/11/E8-4773/airworthiness-directives-boeing-model-737-600--700--700c--800-and--900-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/616DF4F4DBB9CBF58625740900512C62.0001
- Page: https://openairdocs.org/proposed/FAA-2008-0269

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Boeing Model 737-600, -700, -700C, -800, and -900 series airplanes. This proposed AD would require replacement of the power control relays in the P91 and P92 power distribution panels for the fuel boost and override pumps with new improved relays. This proposed AD would also require a revision to the Airworthiness Limitations (AWLs) section of the Instructions for Continued Airworthiness to incorporate AWL No. 28-AWL-20. This proposed AD results from fuel system reviews conducted by the manufacturer. We are proposing this AD to prevent pump housing burn-through due to electrical arcing, which could create a potential ignition source inside a fuel tank. This condition, in combination with flammable fuel vapors, could result in a fuel tank explosion and consequent loss of the airplane.

## Notices in this docket

- Mar 11, 2008: Notice of proposed rulemaking (NPRM). (first notice), FR document E8-4773, comments due Apr 25, 2008 (https://www.federalregister.gov/documents/2008/03/11/E8-4773/airworthiness-directives-boeing-model-737-600--700--700c--800-and--900-series-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.