# AD 98-16-17 R1: Secondary horizontal stabilizer - Type: Airworthiness directive - Status: Current - Products: Textron 750 - Effective: October 23, 2003 - Published: October 23, 2003, 68 FR 60624–60625 - Issued: October 17, 2003 - Issued as: Final rule; rescission - Supersedes: [AD 98-16-17](https://openairdocs.org/ad/98-16-17) - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Amendment: 39-13347 - Docket: 99-NM-229-AD - Registered aircraft: 287 may be affected, by airframe or engine model (OpenAirDocs) - Official PDF: https://openairdocs.org/files/sha256/2a/56/2a565bcadfbe9c377ba1cad6862d5a563bd9677f3e624ebdbb5c864a48ff186e (from https://www.govinfo.gov/content/pkg/FR-2003-10-23/pdf/03-26723.pdf) - Federal Register: https://www.federalregister.gov/documents/2003/10/23/03-26723/airworthiness-directives-cessna-model-750-citation-x-series-airplanes - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E44A821C78D3F3E286256DC80055AD92.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/98-16-17-R1 ## Summary This amendment rescinds Airworthiness Directive (AD) 98-16-17 R1, which is applicable to all Cessna Model 750 Citation X series airplanes. That AD requires repetitive in-flight functional tests to verify proper operation of the secondary horizontal stabilizer pitch trim system, and repair if necessary. The requirements of that AD were intended to detect and correct contamination and damage in the system actuator, which could result in simultaneous failure of both primary and secondary pitch trim systems, and consequent reduced controllability of the airplane. Since the issuance of that AD, an improved part has been developed, which, if installed, would terminate the repetitive tests; that improved part has been installed on all affected airplanes or is being installed in production. Therefore, the identified unsafe condition no longer exists. ## The airworthiness directive ### The Rescission Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows: PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: 2. Section 39.13 is amended by adding an AD which removes amendment 39-10693, to read as follows: 98-16-17 R1 Cessna Aircraft Company: Amendment 39-13347. Docket No. 99-NM-229-AD. Rescinds AD 98-16-17, Amendment 39-10693. Applicability: All Model 750 Citation X series airplanes, certificated in any category. This rescission is effective October 23, 2003. ## Rule preamble ### Effective date October 23, 2003. ### For further information contact Joel M. Ligon, Aerospace Engineer, Systems and Propulsion Branch, ACE-116W, FAA, Small Airplane Directorate, Wichita Aircraft Certification Office, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209; telephone (316) 946-4138; fax (316) 946-4407. ### SUPPLEMENTARY INFORMATION A proposal to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) to include an airworthiness directive (AD) that is applicable to all Cessna Model 750 Citation X series airplanes was published in the Federal Register on January 7, 2000 (65 FR 1075). That action proposed to rescind AD 98-16-17, amendment 39-10693 (63 FR 42206, August 13, 1999), which currently requires repetitive in-flight functional tests of the secondary horizontal stabilizer pitch trim system, and repair if necessary. ### Comments We provided the public the opportunity to participate in the development of this AD. We received no comments on the proposed rescission. ### Conclusion We have carefully reviewed the available data and determined that air safety and the public interest require rescinding the AD as proposed. ### FAA's Determination Since AD 98-16-17 was issued, an improved part has been developed. Installation of that part terminates the repetitive tests required by the existing AD. The FAA has been advised that the improved part has been installed on all affected airplanes or will be installed in production. The FAA has determined that the previous part number is no longer available or allowed to be installed. Therefore, the identified unsafe condition no longer exists, and we have determined that it is necessary to rescind AD 98-16-17 to prevent operators from performing unnecessary actions. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS T00007WI](https://openairdocs.org/tcds/T00007WI): Textron Aviation Inc.; names 1 of 1 models: 750 ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 287 (287 by airframe model, 0 by engine model) - Makers: Cessna 272, Textron 15 Models with the most aircraft: - [Cessna 750](https://openairdocs.org/model/cessna-750): 272 aircraft (airframe model) - [Textron 750](https://openairdocs.org/model/textron-750): 15 aircraft (airframe model) All 3 models: https://openairdocs.org/ad/98-16-17-R1/models.md Every aircraft: https://openairdocs.org/ad/98-16-17-R1/aircraft.md ## Related documents - [AD 98-16-17](https://openairdocs.org/ad/98-16-17) (historical): Secondary Horizontal Stabilizer Trim Actuator · Cessna Aircraft Company, The 750. Effective Aug 24, 1998. Replaced by this AD - [Proposed rule 99-NM-229-AD](https://openairdocs.org/proposed/99-NM-229-AD): Notice of proposed rulemaking (NPRM); rescission, published Jan 7, 2000 Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.