What was found
PILOT REPORTED THAT THE COCKPIT SEAT BASE PAD FELT LOOSE. MAINTENANCE INSPECTED THE SEAT ONLY TO FIND THE SHEETMETAL BASE PLATE CRACKED ON ONE SIDE AND BROKE OFF ON THE OTHER SIDE. THIS IS PART OF AN ADJUSTMENT RAIL THAT ALLOWS MOVEMENT UP AND DOWN ON THE FORWARD SEAT PAD FOR THIGH SUPPORT. WHILE THIS IS ADJUSTABLE ON THE FRONT OF THE PAD WITH A RAIL THE AFT PORTION OF THE RAIL IS HARD MOUNTED TO A SHEETMETAL BASE PLATE THAT IS APPROX .090 THICK. THE ADJUSTMENT RAIL HAS APPROX 15 DEGREES OF UP AND DOWN TRAVEL AND FLEXES THE SHEETMETAL BASE PLATE. THIS ATTACHMENT IS ONLY 1 INCH AWAY FROM THE HARD ATTACHMENT TO THE STRUCTURAL SIDES OF THE LOWER SEAT ASSY. IF PILOTS ROUTINELY USE THIS ADJUSTMENT ON THE SEAT IT IS A MATTER OR WHEN NOT IF THE SHEETMETAL BASE WILL CRACK AND SEPARATE. THE FLEXING ALONE IS BAD BUT ADD THE WEIGHT OF THE PILOT ON THIS AGGRAVATES THE PROBLEM. THE SHEETMETAL BASE IS NOT ITEMIZED IN THE CCM IPC SECTION. THE SEAT MANUFACTURER, GOODRICH, RELEASED A SERVICE INFORMATION LETTER FOR THIS. SIL1423-25-007