# Proposed AD 99-NM-136-AD: Cessna Model 500, 501, 550, 551, and 560 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Withdrawn
- Action: Proposed rule; withdrawal.
- Published: November 18, 1999, 64 FR 62995
- Docket: 99-NM-136-AD
- FR document: 99-30151
- Official PDF: https://openairdocs.org/files/sha256/1d/1c/1d1c2ce33a5d2778f675b1029ecbc86c51b52dfecaa0c02d56aa1c495f552ac6 (from https://www.govinfo.gov/content/pkg/FR-1999-11-18/pdf/99-30151.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/11/18/99-30151/airworthiness-directives-cessna-model-500-501-550-551-and-560-series-airplanes
- Page: https://openairdocs.org/proposed/99-NM-136-AD

## Summary

This action withdraws a notice of proposed rulemaking (NPRM) that proposed a new airworthiness directive (AD), applicable to certain Cessna Model 500, 501, 550, 551, and 560 series airplanes. That action would have required revising the Airplane Flight Manual (AFM) to include requirements for activation of the airframe pneumatic deicing boots. Since the issuance of the NPRM, the Federal Aviation Administration (FAA) has received new data that indicates the AFM revision is unneccessary. Accordingly, the proposed rule is withdrawn.

## Notices in this docket

- Jul 16, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-17533, comments due Aug 16, 1999 (https://www.federalregister.gov/documents/1999/07/16/99-17533/airworthiness-directives-cessna-models-500-501-550-551-and-560-airplanes)
- Nov 18, 1999: Proposed rule; withdrawal., FR document 99-30151 (https://www.federalregister.gov/documents/1999/11/18/99-30151/airworthiness-directives-cessna-model-500-501-550-551-and-560-series-airplanes)

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