# Proposed AD FAA-2007-29248: Saab Model SAAB-Fairchild SF340A (SAAB/ SF340A) and SAAB 340B Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2008-09-06
- Products: SAAB
- Product type: Aircraft
- Action: Supplemental notice of proposed rulemaking (NPRM); reopening of comment period.
- Published: March 6, 2008, 73 FR 12034
- Comments due: March 26, 2008
- Became: [AD 2008-09-06](https://openairdocs.org/ad/2008-09-06)
- Docket: FAA-2007-29248 (https://www.regulations.gov/docket/FAA-2007-29248, where comments are filed)
- Project: 2007-NM-155-AD
- FR document: E8-4326
- Official PDF: https://openairdocs.org/files/sha256/7e/6b/7e6b32b55e24718320100d57f1b3bb7ca42dfc4032b30108bde706ed23c48ace (from https://www.govinfo.gov/content/pkg/FR-2008-03-06/pdf/E8-4326.pdf)
- Federal Register: https://www.federalregister.gov/documents/2008/03/06/E8-4326/airworthiness-directives-saab-model-saab-fairchild-sf340a-saabsf340a-and-saab-340b-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/636EF460ACA446E486257404005421D1.0001
- Page: https://openairdocs.org/proposed/FAA-2007-29248

## Summary

We are revising an earlier NPRM for the products listed above. This action revises the earlier NPRM by expanding the scope. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

Subsequent to accidents involving Fuel Tank System explosions in flight * * * and on ground, * * * Special Federal Aviation Regulation 88 (SFAR88) * * * required a safety review of the aircraft Fuel Tank System * * *. * * * * *

Fuel Airworthiness Limitations are items arising from a systems safety analysis that have been shown to have failure mode(s) associated with an "unsafe condition'' * * *. These are identified in Failure Conditions for which an unacceptable probability of ignition risk could exist if specific tasks and/or practices are not performed in accordance with the manufacturers' requirements.

The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Sep 19, 2007: Notice of proposed rulemaking (NPRM). (first notice), FR document E7-18478, comments due Oct 19, 2007 (https://www.federalregister.gov/documents/2007/09/19/E7-18478/airworthiness-directives-saab-model-saab-fairchild-sf340a-saabsf340a-and-saab-340b-airplanes)
- Mar 6, 2008: Supplemental notice of proposed rulemaking (NPRM); reopening of comment period., FR document E8-4326, comments due Mar 26, 2008 (https://www.federalregister.gov/documents/2008/03/06/E8-4326/airworthiness-directives-saab-model-saab-fairchild-sf340a-saabsf340a-and-saab-340b-airplanes)

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