# Proposed AD FAA-2015-7524: Saab AB, Saab Aeronautics (Formerly Known as Saab AB, Saab Aerosystems)

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-12-05
- Products: Saab AB,  Saab Aeronautics
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 17, 2015, 80 FR 78702
- Comments due: February 1, 2016
- Became: [AD 2016-12-05](https://openairdocs.org/ad/2016-12-05)
- Docket: FAA-2015-7524 (https://www.regulations.gov/docket/FAA-2015-7524, where comments are filed)
- Project: 2014-NM-231-AD
- FR document: 2015-31537
- Official PDF: https://openairdocs.org/files/sha256/99/4e/994ec3a35b7a904ba4be9bcc8144922072a4705f0bef66d0f7cf5df2240acbcc (from https://www.govinfo.gov/content/pkg/FR-2015-12-17/pdf/2015-31537.pdf)
- Federal Register: https://www.federalregister.gov/documents/2015/12/17/2015-31537/airworthiness-directives-saab-ab-saab-aeronautics-formerly-known-as-saab-ab-saab-aerosystems
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EACF2908D4C5B07A86257F1E0057BAD7.0001
- Page: https://openairdocs.org/proposed/FAA-2015-7524

## Summary

We propose to supersede Airworthiness Directive (AD) 2014-15- 04 for certain Saab AB, Saab Aeronautics Model SAAB 2000 airplanes. AD 2014-15-04 currently requires deactivating the potable water system, or alternatively filling and activating the potable water system. Since we issued AD 2014-15-04, the manufacturer developed a modification that would address the unsafe condition. This proposed AD would also require inspecting the in-line heater for correct brazing and corrective action if needed, and installing a shrinkable tube on the water line and a spray shield on the in-line heater. We are proposing this AD to prevent rudder pedal restriction due to the pitch control mechanism becoming frozen as the result of water spray, which could prevent disconnection and normal pitch control, and consequently result in reduced controllability of the airplane.

## Notices in this docket

- Dec 17, 2015: Notice of proposed rulemaking (NPRM). (first notice), FR document 2015-31537, comments due Feb 1, 2016 (https://www.federalregister.gov/documents/2015/12/17/2015-31537/airworthiness-directives-saab-ab-saab-aeronautics-formerly-known-as-saab-ab-saab-aerosystems)

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