(The following combines two submissions from the same repair station describing identical discrepancies on two different Cessna 550 aircraft. Ten photographs were included, two of which are duplicated here.)

“The upper chair base assembly(s) are cracked at the chair back attach points.” These discrepancies include notations that these assemblies both show previous, inappropriate repairs. The technician references Aviation Fabricators STC (supplemental type certificate) ST01042WI structural seat repair as proper guidance. Part numbers for the left and right assemblies were noted as 5519015-13 and -14. (See also the Alerts for July, September, and November for almost identical reports. From 2002 to the present, the SDRS data base records 19 reports related to this ATA code, 15 of which specifically reference cracks.)

Part Total Times: unknown.