# Proposed AD FAA-2008-1143: Boeing Model 737-600, -700, -700C, - 800, and -900 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2009-16-07
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 31, 2008, 73 FR 64894
- Comments due: December 15, 2008
- Became: [AD 2009-16-07](https://openairdocs.org/ad/2009-16-07)
- Docket: FAA-2008-1143 (https://www.regulations.gov/docket/FAA-2008-1143, where comments are filed)
- Project: 2008-NM-136-AD
- FR document: E8-25990
- Official PDF: https://openairdocs.org/files/sha256/7c/47/7c47fed3d838e030bc7ceb76263bf77e2c7ffecefa1f45aa7f0cd748c075409f (from https://www.govinfo.gov/content/pkg/FR-2008-10-31/pdf/E8-25990.pdf)
- Federal Register: https://www.federalregister.gov/documents/2008/10/31/E8-25990/airworthiness-directives-boeing-model-737-600--700--700c--800-and--900-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/985E18C8BDEB693F862574F3005CE84B.0001
- Page: https://openairdocs.org/proposed/FAA-2008-1143

## Summary

The FAA proposes to supersede an existing airworthiness directive (AD) that applies to certain Boeing Model 737-600, -700, - 700C, -800, and -900 series airplanes. The existing AD currently requires replacing brackets that hold the P5 panel to the airplane structure, the standby compass bracket assembly, the generator drive and standby power module, and the air conditioning module. The existing AD also currently requires, among other actions, inspecting for wire length and for damage of the connectors and the wire bundles, and doing applicable corrective actions if necessary. This proposed AD would require an additional operational test of the P5-14 panel. This proposed AD results from a report of an electrical burning smell in the flight compartment. We are proposing this AD to prevent wire bundles from contacting the overhead dripshield panel and modules in the P5 overhead panel, which could result in electrical arcing and shorting of the electrical connector and consequentloss of several critical systems essential for safe flight; and to ensure proper operation of the passenger oxygen system. If an improperly functioning passenger oxygen system goes undetected, the passenger oxygen mask could fail to deploy and result in possible incapacitation of passengers during a depressurization event.

## Notices in this docket

- Oct 31, 2008: Notice of proposed rulemaking (NPRM). (first notice), FR document E8-25990, comments due Dec 15, 2008 (https://www.federalregister.gov/documents/2008/10/31/E8-25990/airworthiness-directives-boeing-model-737-600--700--700c--800-and--900-series-airplanes)

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