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AD/CESSNA 525/6 - Electrical Power - Relay Circuit Protection
Cessna 525 Series AeroplanesCessna 525 Series Aeroplanes
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Cessna 525 Series Aeroplanes
| AD/CESSNA 525/6 | Electrical Power - Relay Circuit Protection | 2/2008 DM |
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| Applicability: | Model 525B aeroplanes, serial numbers 0001 through 0013 inclusive. |
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| Requirement: | Unless already accomplished, incorporate electrical power relay circuit protection kit part number (P/N) SB525B-24-02 by following Cessna Citation Service Bulletin SB525B-24-02 Revision 1 dated 4 October 2007. |
| Later revisions of the above SB, approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2007-23-16, are considered acceptable for compliance with the equivalent Requirements of this Directive. | |
| Note: FAA AD 2007-23-16 Amdt 39-15262 refers. | |
| Compliance: | Either before 18 January 2008 or within the next 10 hours time-in-service after 19 December 2007, whichever occurs first. |
| This Airworthiness Directive becomes effective on 19 December 2007. | |
| Background: | The FAA has received a report of a Model 525B aeroplane experiencing in-flight loss of numerous systems, tripped circuit breakers, together with burned wiring adjacent to the power distribution panel, this was a result of aircraft wiring left unprotected in the original design. |
| This Directive requires an electrical power relay circuit protection kit P/NSB525B-24-02 to be installed and is issued to correct an incorrect wiring installation and to provide short-circuit protection for all wiring from the aircraft power distribution system. |
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Charles Lenarcic
Delegate of the Civil Aviation Safety Authority
7 December 2007