# Proposed AD FAA-2012-0332: BAE Systems (Operations) Limited Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2012-16-08
- Products: BAE Systems
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 5, 2012, 77 FR 20572
- Comments due: May 21, 2012
- Became: [AD 2012-16-08](https://openairdocs.org/ad/2012-16-08)
- Docket: FAA-2012-0332 (https://www.regulations.gov/docket/FAA-2012-0332, where comments are filed)
- Project: 2011-NM-130-AD
- FR document: 2012-8128
- Official PDF: https://openairdocs.org/files/sha256/21/ea/21ea78e48e4785d2484a26c55b58eacae41cb3460cf8b0eaf182775f05ccb21c (from https://www.govinfo.gov/content/pkg/FR-2012-04-05/pdf/2012-8128.pdf)
- Federal Register: https://www.federalregister.gov/documents/2012/04/05/2012-8128/airworthiness-directives-bae-systems-operations-limited-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BC95C07F86436F7F862579D700624A43.0001
- Page: https://openairdocs.org/proposed/FAA-2012-0332

## Summary

We propose to adopt a new airworthiness directive (AD) for certain BAE SYSTEMS (OPERATIONS) LIMITED Model BAe 146 and Model Avro 146-RJ airplanes. This proposed AD was prompted by reports of cracking and surface anomalies of the fuselage skin at the water trap/air drier unit of the forward discharge valve due to corrosion. This proposed AD would require repetitive detailed inspections for bulging, surface anomalies, and cracking of the fuselage skin adjacent to the discharge valves, repair if necessary, and application of additional sealant in the affected area if necessary. We are proposing this AD to detect and correct bulging, surface anomalies, and cracking that could propagate towards the forward discharge valve outlet and result in the failure of the fuselage skin, leading to a possible sudden loss of cabin pressure.

## Notices in this docket

- Apr 5, 2012: Notice of proposed rulemaking (NPRM). (first notice), FR document 2012-8128, comments due May 21, 2012 (https://www.federalregister.gov/documents/2012/04/05/2012-8128/airworthiness-directives-bae-systems-operations-limited-airplanes)

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