# Proposed AD FAA-2005-23282: Boeing Model 757-200 and -300 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2006-04-14
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 13, 2005, 70 FR 73663
- Comments due: January 27, 2006
- Became: [AD 2006-04-14](https://openairdocs.org/ad/2006-04-14)
- Docket: FAA-2005-23282 (https://www.regulations.gov/docket/FAA-2005-23282, where comments are filed)
- Project: 2005-NM-210-AD
- FR document: 05-23956
- Official PDF: https://openairdocs.org/files/sha256/d1/da/d1da29f22769d452a426df5ea65ef83d0a64510088bb0d88c5f1dd42319ce357 (from https://www.govinfo.gov/content/pkg/FR-2005-12-13/pdf/05-23956.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/12/13/05-23956/airworthiness-directives-boeing-model-757-200-and--300-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/987FD1B49ABD8CB6862570D60070C6FC.0001
- Page: https://openairdocs.org/proposed/FAA-2005-23282

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Boeing Model 757-200 and -300 series airplanes. This proposed AD would require installing clamps on certain end caps of the overhead distribution ducts, and doing other specified and related investigative actions as necessary. This proposed AD results from finding that the end caps of the overhead distribution ducts for the air conditioning system were not bonded to the ducts with an adhesive. We are proposing this AD to detect and correct loosened end caps, which could change the air flow balance in the airplane. During a smoke event in the cargo or main electronics compartments, the incorrect balance of air flow could change the smoke clearance air capacity and result in smoke and toxic fumes penetrating the flight deck and main cabin.

## Notices in this docket

- Dec 13, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-23956, comments due Jan 27, 2006 (https://www.federalregister.gov/documents/2005/12/13/05-23956/airworthiness-directives-boeing-model-757-200-and--300-series-airplanes)

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