Cessna 425/441 Conquest I/Conquest II
Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor; Flight Crew Multiengine
Flight Crew Last 90 Days 55; Flight Crew Total 9600; Flight Crew Type 1000
Situational Awareness
Deviation / Discrepancy - Procedural Published Material / Policy; Ground Excursion Runway; Inflight Event / Encounter Weather / Turbulence
General None Reported / Taken
Human Factors; Weather
Weather at destination was forecast to be VFR at arrival time and everything except destination was improving. Flew the ILS 28R approach to minimums and executed the missed approach and climbed on top fog deck which was about 300-400 feet thick. Entered a hold and watched the fog move slowly out of the area. Requested the RNAV 28R approach and this time at minimums saw a portion of the runway and executed the missed approach and held again. A few minutes later the fog appeared to be thinning and requested the RNAV 28R approach again. I entered the top of the fog layer at about 800 feet MSL and at minimums I looked up and saw the runway environment in sight and continued my descent. The last time I looked at the airspeed indicator I was at VREF and at about 50 feet I reduced power to flight idle. In the flare the aircraft floated and I forced it on the runway in a level attitude; touching down in the first one third of the runway. Shortly after applying brakes and reverse pitch I realized there was not much runway left and I used maximum braking and reverse pitch. As I neared the end I was slowing considerably but did not think I could stop before the end of the runway. I quickly considered the grass overrun at the end and entered it at about 20 knots; reducing my reverse to flight idle. I executed a 180 turn on the smooth overrun and reentered the hard surface runway without any damage to aircraft or property. After arriving at the FBO I carefully inspected the aircraft and found no damage.After replaying everything over I realized that I had looked at the runway length; on the approach plate and had overlooked the displaced threshold; making the runway long and obviously even less from where the glide path intersects the runway. Five minutes after my landing the fog was dissipating quickly and had I waited I could probably have landed visually.
The pilot of a C-441 reported a runway overrun after an instrument approach to minimums and a slightly long landing. The useful runway length was reported to have been overlooked.