Cessna Citation Sovereign (C680)
Maintenance Airframe; Maintenance Inspection Authority; Maintenance Powerplant
Communication Breakdown
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Other / Unknown
General Flight Cancelled / Delayed; General Maintenance Action
Human Factors; Aircraft
Main Cabin Door upper step (hinged) riser is found bent on occasion. Sometimes by crew members that cause flight schedule disruptions and others times by technicians during inspections. Step riser Part Number (P/N) 4419086-10 has been replaced 15 times in the past 365 days. When this riser bends it can cause a trip hazard; depending on the amount of bend and unleveling of the top step surface or when allowing the trim piece to stick out from its flush position. Recommend Cessna engineering will need to improve the structure of the riser assembly to carry a higher load.
A Maintenance Manager reports the Main Cabin Door Entrance upper step (hinged) riser has been replaced 15 times in the last 365 days on their Cessna CE-680 aircraft. Risers are found bent by flight crews and Maintenance technicians. When the riser bends; the top surface of the upper step becomes unleveled causing a trip hazard.