# Proposed AD FAA-2014-0603: Meggitt (Troy), Inc. Combustion Heaters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2017-06-03
- Products: Meggitt
- Product type: Appliance
- Action: Supplemental notice of proposed rulemaking (SNPRM); reopening of comment period.
- Published: November 3, 2016, 81 FR 76532
- Comments due: December 19, 2016
- Became: [AD 2017-06-03](https://openairdocs.org/ad/2017-06-03)
- Docket: FAA-2014-0603 (https://www.regulations.gov/docket/FAA-2014-0603, where comments are filed)
- Project: 2013-CE-026-AD
- FR document: 2016-26428
- Official PDF: https://openairdocs.org/files/sha256/05/9c/059c0f93f3f1dd9cd8f629e89bd75069ffeb41a1e18b371642e32ccd6cda29d7 (from https://www.govinfo.gov/content/pkg/FR-2016-11-03/pdf/2016-26428.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/11/03/2016-26428/airworthiness-directives-meggitt-troy-inc-combustion-heaters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/43B9194D83212FA286258060004AFABE.0001
- Page: https://openairdocs.org/proposed/FAA-2014-0603

## Summary

We are revising a notice of proposed rulemaking (NPRM) for certain Meggitt (Troy), Inc. (previously known as Stewart Warner South Wind Corporation and as Stewart Warner South Wind Division) Model Series (to include all the variants) 921, 930, 937, 940, 944, 945, 977, 978, 979, 8240, 8253, 8259, and 8472 combustion heaters that proposed to supersede airworthiness directive (AD) 81-09-09. The NPRM proposed to retain most actions from AD 81-09-09, add a calendar time to the repetitive inspections, add more detailed actions to the inspections, and add a pressure decay test. The NPRM was prompted by an airplane accident and reports we received of the heater malfunctioning. This action revises the NPRM by adding combustion heater models series to the applicability and modifying the compliance times. We are proposing this SNPRM to correct the unsafe condition on these products. Since these actions impose an additional burden over that proposed in the NPRM, we are reopening the comment period to allow the public the chance to comment on these proposed changes.

DATES: The comment period for the NPRM published in the Federal Register on August 20, 2014 (79 FR 49249) is reopened.

## Notices in this docket

- Aug 20, 2014: Notice of proposed rulemaking (NPRM). (first notice), FR document 2014-19729, comments due Oct 6, 2014 (https://www.federalregister.gov/documents/2014/08/20/2014-19729/airworthiness-directives-meggitt-troy-inc-combustion-heaters)
- Nov 3, 2016: Supplemental notice of proposed rulemaking (SNPRM); reopening of comment period., FR document 2016-26428, comments due Dec 19, 2016 (https://www.federalregister.gov/documents/2016/11/03/2016-26428/airworthiness-directives-meggitt-troy-inc-combustion-heaters)

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