# Proposed AD FAA-2012-0421: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2012-25-03
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 25, 2012, 77 FR 24643
- Comments due: June 11, 2012
- Became: [AD 2012-25-03](https://openairdocs.org/ad/2012-25-03)
- Docket: FAA-2012-0421 (https://www.regulations.gov/docket/FAA-2012-0421, where comments are filed)
- Project: 2012-NM-042-AD
- FR document: 2012-9916
- Official PDF: https://openairdocs.org/files/sha256/05/55/05551815f20d8982733601da9c4b96ec2fdb2bd4cf569e8bdc40e1cd584b5b5f (from https://www.govinfo.gov/content/pkg/FR-2012-04-25/pdf/2012-9916.pdf)
- Federal Register: https://www.federalregister.gov/documents/2012/04/25/2012-9916/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9E9B1493B598EAC3862579EB0042887F.0001
- Page: https://openairdocs.org/proposed/FAA-2012-0421

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Boeing Company Model 757 airplanes. This proposed AD was prompted by a report of in-flight fracture of the right windshield (window 1) on the flight deck and multiple reports of electrical arcs at the terminal blocks of the flight deck windshields resulting in smoke and fire. This proposed AD would require repetitive inspections of electrical heat terminals on the left and right windshields for damage, and corrective actions if necessary. This proposed AD would also allow for replacing an affected windshield with a windshield equipped with different electrical connections, which would terminate the repetitive inspections for that windshield. We are proposing this AD to prevent smoke and fire in the flight deck, which can lead to loss of visibility, and injuries to or incapacitation of the flight crew.

## Notices in this docket

- Apr 25, 2012: Notice of proposed rulemaking (NPRM). (first notice), FR document 2012-9916, comments due Jun 11, 2012 (https://www.federalregister.gov/documents/2012/04/25/2012-9916/airworthiness-directives-the-boeing-company-airplanes)

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