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2005-23-04: Manual feather-and-unfeather system

FAA order 2005-23-04 is an airworthiness directive in force since December 19, 2005. The FAA's subject line: Manual feather-and-unfeather system. It names Saab Aircraft Ab SAAB 2000: about 6 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: propeller.

What it applies to as the FAA lists it

Kind of product
Aircraft
Makes
Saab AB, Saab Aerosystems
Models
SAAB 2000
On this site
Saab Aircraft Ab SAAB 2000 6 registered

Dates and paperwork

In force since
December 19, 2005
Published
November 14, 2005 (signed October 27, 2005)
Docket
FAA-2005-22255
Status
Current
The FAA's document
Read the order on the FAA's site

The FAA's summary their words, unchanged

The FAA is adopting a new airworthiness directive (AD) for certain Saab Model SAAB 2000 airplanes. This AD requires modifying the manual feather-and-unfeather system for the propellers to make the design of the system more robust. This AD results from reports of in- flight engine shutdown caused by uncommanded operation of the feather pump of the propeller. We are issuing this AD to prevent uncommanded feathering of the propeller, which could result in the shutdown of an engine during flight and consequent reduced controllability of the airplane.

The order itself the regulatory text, as published

Show the full text (2,951 characters)
2005-23-04 Saab Aircraft AB: Amendment 39-14362. Docket No. FAA- 2005-22255; Directorate Identifier 2005-NM-106-AD. Effective Date (a) This AD becomes effective December 19, 2005. Affected ADs (b) None. Applicability (c) This AD applies to Model SAAB 2000 airplanes, certificated in any category, serial numbers -004 through -063 inclusive. Unsafe Condition (d) This AD results from reports of in-flight engine shutdown caused by uncommanded operation of the feather pump of the propeller. We are issuing this AD to prevent uncommanded feathering of the propeller, which could result in the shutdown of an engine during flight and consequent reduced controllability of the airplane. Compliance (e) You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Modification (f) Within 12 months after the effective date of this AD, modify the manual feather-and-unfeather system of the propellers by doing all actions specified in the Accomplishment Instructions of Saab Service Bulletin 2000-61-006, Revision 01, dated February 17, 2005. Actions Accomplished Previously (g) A modification accomplished before the effective date of this AD in accordance with Saab Service Bulletin 2000-61-006, dated December 20, 2004, is acceptable for compliance with paragraph (f) of this AD. Alternative Methods of Compliance (AMOCs) (h)(1) The Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19. (2) Before using any AMOC approved in accordance with Sec. 39.19 on any airplane to which the AMOC applies, notify the appropriate principal inspector in the FAA Flight Standards Certificate Holding District Office. Related Information (i) Swedish airworthiness directive 1-198, dated February14, 2005, also addresses the subject of this AD. Material Incorporated by Reference (j) You must use Saab Service Bulletin 2000-61-006, Revision 01, dated February 17, 2005, to perform the actions that are required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approved the incorporation by reference of this document in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Saab Aircraft AB, SAAB Aircraft Product Support, S-581.88, Linkoping, Sweden, for a copy of this service information. You may review copies at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street, SW., room PL-401, Nassif Building, Washington, DC; on the Internet at http://dms.dot.gov; or at the National Archives and Records Administration (NARA). For information on the availability of this material at the NARA, call (202) 741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html .

Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/2005-23-04.json · aircraft systems.