Airworthiness Directive · Amendment 39-14069 · Cessna Model 750 Airplanes
Cessna Model 750 Airplanes
Superseded. A later AD replaced this one: AD 2006-24-01. Comply with the one in force.
This AD applies to Cessna Model 750 airplanes, certificated in any category, serial numbers-0001 through-0240 inclusive.
The FAA is adopting a new airworthiness directive (AD) for certain Cessna Model 750 airplanes. The AD requires repetitive inspections for clearance and chafing of an auxiliary power unit (APU) fuel tube assembly in the tail cone area of the airplane, and corrective actions if necessary. For certain airplanes, this AD also requires replacing the APU fuel line. This AD is prompted by reports of chafed APU fuel tubes leaking into the tail cone area due to interference between the fuel tube assembly and elevator flight control cables, hydraulic lines, and high-temperature bleed air couplings. We are issuing this AD to detect and correct this interference, which could result in chafing, fuel leaking into an area where ignition sources are present, and possible fire in an area without fire detection or extinguishing provisions.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
For all airplanes: Within 25 flight hours or 48 days, whichever occurs first after the effective date of this AD, do a detailed inspection to verify the clearance and detect chafing of one of the APU fuel tube assemblies in the tail cone area of the airplane due to interference between the APU fuel tube and elevator flight control cables, hydraulic lines, and high temperature bleed air couplings. Do the actions in accordance with the Accomplishment Instructions of Cessna Alert Service Letter (ASL) ASL750-49-09, Revision 2, dated March 10, 2005. Do applicable corrective actions before further flight in accordance with the ASL. Repeat the inspection thereafter at the earlier of the times specified in paragraphs (f)(1) and (f)(2) of this AD.
(1) At intervals not to exceed 250 flight hours or 3 months, whichever occurs first.
(2) Before further flight after access to the inspection area for any other inspection or maintenance.
Note 1: For the purposes of this AD, a detailed inspection is: “An intensive examination of a specific item, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirror, magnifying lenses, etc., may be necessary. Surface cleaning and elaborate procedures may be required.”
For airplanes having serial numbers -0001 through -0031 inclusive and -0033 through -0107 inclusive: Before the first inspection required by paragraph (f) of this AD, replace the APU fuel tube in the tail cone area of the airplane, in accordance with Cessna Service Bulletin SB750-49-05, Revision 1, dated January 17, 2000. The replacement APU fuel tube must be a new APU fuel tube having part number 6756605-23.
At the applicable time specified in paragraph (h)(1) or (h)(2) of this AD, report the results (both positive and negative findings) of the initial inspection required by paragraph (f) of this AD, in accordance with Cessna ASL ASL750-49-09, Revision 2, dated March 10, 2005. Information collection requirements contained in this AD have been approved by the Office of Management and Budget (OMB) under the provisions of the Paperwork Reduction Act of 1980 (44 U.S.C. 3501 et seq.) and have been assigned OMB Control Number 2120-0056.
(1) If the inspection was done after the effective date of this AD: Submit the report within 30 days after the inspection.
(2) If the inspection was done before the effective date of this AD: Submit the report within 30 days after the effective date of this AD.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
