Airworthiness directives › 2012-07-04
AD 2012-07-04 Airworthiness Directives; Cessna Aircraft Company Airplanes
Makes named: cessna. Models named: 680. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Cessna Aircraft Company Model 680 airplanes; certificated in any category; serial numbers -0001 through -0289 inclusive, and -0291 through -0296 inclusive.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 400 flight hours or 12 months after the effective date of this AD, whichever occurs first: Install a kit, part number (P/N) SB680-24-11, to the left and right motive flow relays, in accordance with the Accomplishment Instructions of Cessna Service Bulletin SB680-24-11, Revision 1, dated November 15, 2011. The kit (P/N SB680-24-11) contains 2 sleeves, 4 splices, 2 diodes (P/N 1N4006), and instructions.
Unsafe condition
This AD was prompted by a false cross-feed command to the right-hand fuel control card, due to the cross-feed inputs on the left- and right-hand fuel control cards being connected together and causing an imbalance of fuel between the left and right wing tanks. We are issuing this AD to prevent lateral imbalance of the airplane, resulting from uncontrolled fuel cross-feed, which can be corrected by deflecting the aileron trim; deflecting the aileron trim increases the pilot's workload and could exceed the airplane's limitation in a short period of time, resulting in reduced controllability of the airplane.
Affected ADs
None.
Read the original on the Federal Register →
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1