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Wed, Aug 26, 2015

AD: Cessna Aircraft Company Airplanes

AD NUMBER: 2015-17-12

PRODUCT: Certain Cessna Aircraft Company Model 500, 501, 550, 551, S550, 560, and 650 airplanes.

ACTION: Final Rule

SUMMARY: This AD was prompted by reports of smoke and/or fire in the tailcone caused by sparking due to excessive wear of the brushes in the air conditioning (A/C) motor.

This AD requires inspections to determine if certain A/C compressor motors are installed and to determine the accumulated hours on certain A/C compressor motor assemblies; and repetitive replacement of the brushes in the A/C compressor motor assembly, or, as an option to the brush replacement, deactivation of the A/C system and placard installation; and return of replaced brushes to Cessna.

The FAA is issuing this AD to prevent the brushes in the A/C motor from wearing down beyond their limits, which could result in the rivet in the brush contacting the commutator, causing sparks and consequent fire and/or smoke in the tailcone with no means to detect or extinguish the fire and/or smoke.

DATES: This AD is effective September 29, 2015.

FMI: AD

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