# Proposed AD 99-NM-131-AD: Saab Model SAAB SF-340 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Withdrawn
- Action: Proposed rule; withdrawal.
- Published: October 13, 1999, 64 FR 55440
- Docket: 99-NM-131-AD
- FR document: 99-26714
- Official PDF: https://openairdocs.org/files/sha256/1a/db/1adb073b29e3fe6d31e036a5e247d66de4530d94e072c915b76b978ca49f8a6e (from https://www.govinfo.gov/content/pkg/FR-1999-10-13/pdf/99-26714.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/10/13/99-26714/airworthiness-directives-saab-model-saab-sf-340-series-airplanes
- Page: https://openairdocs.org/proposed/99-NM-131-AD

## Summary

This action withdraws a notice of proposed rulemaking (NPRM) that proposed a new airworthiness directive (AD), applicable to Saab Model SAAB SF-340 series airplanes. That action would have required replacement of the existing pneumatic de-icing boot pressure indicator switch with a newly designed switch. Since the issuance of the NPRM, the Federal Aviation Administration (FAA) has received new data that demonstrates that the unsafe condition cannot occur. Accordingly, the proposed rule is withdrawn.

## Notices in this docket

- Jul 22, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-18733, comments due Aug 23, 1999 (https://www.federalregister.gov/documents/1999/07/22/99-18733/airworthiness-directives-saab-model-saab-sf-340-series-airplanes)
- Oct 13, 1999: Proposed rule; withdrawal., FR document 99-26714 (https://www.federalregister.gov/documents/1999/10/13/99-26714/airworthiness-directives-saab-model-saab-sf-340-series-airplanes)

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