AD 2005-08-03 Airworthiness Directives; Cessna Model 680 Airplanes

Makes named: cessna. Models named: 680. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to Cessna Model 680 airplanes, certificated in any category; with serial numbers -0001 through -0021 inclusive.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Airplane Flight Manual (AFM) Revisions (f) Within 72 hours after the effective date of this AD, revise the applicable sections of the Cessna Model 680 Citation Airplane Flight Manual 68FM by inserting a copy of the procedures contained in the temporary changes listed in Table 1 of this AD. Table 1.—Cessna Temporary Changes Cessna temporary changes Date 68FM TC-R03-01 March 18, 2005. 68FM TC-R03-02 March 18, 2005. 68FM TC-R03-03 March 18, 2005. 68FM TC-R03-04 March 18, 2005. Initial and Repetitive Tests (g) Within 30 days after the effective date of this AD, do a test of the avionics system communication bus for any failure indication in accordance with the Attachment of Cessna Service Bulletin SB680-34-03, Revision 1, dated March 18, 2005. If any failure indications are found during the test, do applicable corrective actions before further flight in accordance with the service bulletin. Repeat the test thereafter at intervals not to exceed 30 days until the actions required by paragraph (h) of this AD are done. Terminating Actions (h) Within 90 days after the effective date of this AD, do hardware and avionics software upgrades in accordance with the Accomplishment Instructions of Cessna Service Bulletin SB680-34-03, including Attachment, Revision 1, dated March 18, 2005. Doing the requirements of this paragraph ends the requirements of paragraph (g) of this AD, and the AFM revisions required by paragraph (f) of this AD may be removed from the AFM. No Reporting Required (i) Although the service bulletin referenced in this AD specifies to submit certain information to the manufacturer, this AD does not include that requirement. Previous Actions (j) Hardware and avionics software upgrades done before the effective date of this AD in accordance with the Accomplishment Instructions of Cessna Service Bulletin SB680-34-03, dated February 2, 2005, is acceptable for compliance with the requirements of paragraph (h) of this AD. Alternative Methods of Compliance (AMOCs) (k) The Manager, Wichita Aircraft Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19. Material Incorporated by Reference (l) You must use the service information that is specified in Table 2 of this AD to perform the actions that are required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approves the incorporation by reference of these documents in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. For copies of the service information, contact Cessna Aircraft Co., P.O. Box 7706, Wichita, Kansas 67277. To view the AD docket, go to the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., room PL-401, Nassif Building, Washington, DC. To review copies of the service information, go to the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html . Table 2.—Material Incorporated by Reference Cessna service information Revision level Date Cessna Service Bulletin SB680-34-03, including Attachment 1 March 18, 2005 Cessna Temporary Change 68FM TC-R03-01 Original March 18, 2005. Cessna Temporary Change 68FM TC-R03-02 Original March 18, 2005. Cessna Temporary Change 68FM TC-R03-03 Original March 18, 2005. Cessna Temporary Change 68FM TC-R03-04 Original March 18, 2005. Issued in Renton, Washington, on April 5, 2005. Kalene C. Yanamura, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05-7379 Filed 4-13-05; 8:45 am] BILLING CODE 4910-13-P

This AD was prompted by a report indicating that analysis of the Honeywell Primus Epic systems installed on Cessna Model 680 airplanes revealed that all four of the cockpit display units could go blank simultaneously. The FAA is issuing this AD to prevent a simultaneous loss of data from all four cockpit display units, and loss of primary navigation instruments, autopilot, flight director, master caution/warning lights, aural warnings, global positioning system (GPS) position information, and air data and altitude information to non-avionics systems. These losses could reduce the flightcrew's situational awareness, increase flightcrew workload, and consequently reduce the ability to maintain safe flight of the airplane.