October 2, 2012
By Dan Namowitz
The FAA has proposed to supersede an existing airworthiness directive (AD) applicable to certain Cessna model 172R, 172S, 182S, 182T, T182T, 206H, and T206H airplanes that requires inspection of the engine oil pressure switch and, if applicable, replacement of the switch.
Since the AD was issued, the FAA has received reports of internal failure of the engine oil pressure switch. Such failure “could result in complete loss of engine oil with consequent partial or complete loss of engine power or fire,” the agency said in its notice of proposed rulemaking published Oct. 2.
The proposed AD would increase the applicability of the AD and limit the switch’s time in service to 3,000 hours, after which the switch would be required to be replaced.
Members are encouraged to study the proposed AD and submit comments to the FAA by Nov.16. Please cite Docket No. FAA-2012-1052; Directorate Identifier 2012-CE-014-AD at the beginning of your comments.
Dan Namowitz is an aviation writer and flight instructor.
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