| AD Number | 98-16-17 R1 | Status | Active |
| Effective Date | October 23, 2003 | Issue Date | October 17, 2003 |
| Docket Number | 99-NM-229-AD | Amendment | 39-13347 |
| Product Type | ["Aircraft"] | Product Subtype | ["Large Airplane"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | (Federal Register: October 23, 2003 (Volume 68, Number 205)) | ||
| Manufacturer(s) | Textron Aviation Inc. |
| Model(s) | 750 |
| Supersedes | 98-16-17 |
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.
Final rule; rescission.
98-16-17 R1 Cessna Aircraft Company: Amendment 39-13347. Docket No. 99-NM-229-AD. Rescinds AD 98-16-17, Amendment 39-10693.\n\n\tApplicability: All Model 750 Citation X series airplanes, certificated in any category.\n\n\tThis rescission is effective October 23, 2003.
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.\n\nComments\n\n\tWe provided the public the opportunity to participate in the development of this AD. We received no comments on the proposed rescission.\n\nConclusion\n\n\tWe have carefully reviewed the available data and determined that air safety and the public interest require rescinding the AD as proposed.\n\nFAA's Determination\n\n\tSince 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.\n\nThe Rescission\n\n\tAccordingly, 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:\n\nPART 39-AIRWORTHINESS DIRECTIVES\n\n1. The authority citation for part 39 continues to read as follows:\n\n\tAuthority: 49 U.S.C. 106(g), 40113, 44701.\n\n§ 39.13 (Amended)\n\n\t2. Section 39.13 is amended by adding an AD which removes amendment 39-10693, to read as follows:
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.