Cessna: Series 172, R172 175; Cracked Engine Mount Attach Bracket; ATA 5313

Cessna: Series 172, R172 175; Cracked Engine Mount Attach Bracket; ATA 5313

(The following safety article from the Wichita Aircraft Certification Office is published as received. Contact information is found at the discussion’s end.)

“The FAA recently received a report of a Cessna Model 175 losing an engine, engine mount and firewall. A close examination of the failure showed that the 0513132-11 bracket had numerous cracks that finally released the upper engine mount attach bolt, producing the failure. A search of SDR’s produced 57 reports of failures of -0513132-11 brackets. The brackets were used on Cessna model 172’s, 175’s and R172’s. A disproportionate number of failures were on 175’s, R172’s, and STC’d 172’s, all with heavier engines than the 172’s.

The 0513132-11 bracket was used from the first 172’s and 175 through the 1979 model year. The area is difficult to inspect because the engine mount bolts need to be removed, and the brackets are often covered with insulation.” (For further information please contact Mr. Gary Parker, aerospace engineer; Wichita Aircraft Certification Office, 1801 Airport Road., Room 100, Wichita, KS. 67209 Phone 316-946-4107.)

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