King Air C90 E90
Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 100; Flight Crew Total 3500; Flight Crew Type 2000
Communication Breakdown; Physiological - Other; Situational Awareness; Time Pressure
Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Weather / Turbulence
General None Reported / Taken
Human Factors
During a Medevac flight to ZZZ1 from ZZZ I initiated an approach with less than the required RVR to do so. Our return flight had been delayed by 4 hours because the patient was very difficult to stabilize. I had checked the weather before departing ZZZ and it was above the minimums that were required for the approach. While enroute to ZZZ1; I acquired the ATIS and found that visibility had decreased to 1/8 mile. The situation at the two nearest options that would allow me to get the hospital was the same. I chose to go to ZZZ2 because it was near enough that we could get the patient to ZZZ1 and the automated weather was well above minimums for the approach. After two attempts at landing in ZZZ2; I realized that the weather was worse than reported there. While I had been maneuvering I was monitoring the conditions at ZZZ1 and they seemed to vary minute by minute. I decided to divert to ZZZ3 since the medic told me we had no time to waste with another approach as he was running low on medication for the patient. When I requested the change to ZZZ3; the controller asked me if I wanted to attempt an approach to ZZZ1. After two go around and working on my fifth backup plan; I was desperate to get the plane on the ground and the patient to the hospital. I accepted the clearance and started the approach. I saw the runway lights at 400 ft AGL and the runway at 200 ft AGL. I decided to land. As I was rolling out I noticed that ground visibility was very low and I realized I had landed with less than the required 2400 RVR that I was supposed to have. Contributing factors: I had the weather and forecast from when I left ZZZ1 6 hours prior printed out. I should have reviewed the forecast more thoroughly rather than just checking present conditions before returning to ZZZ1. I did not realize that night that I was getting sick. During the climb out I was queasy and I attributed this to a lack of horizon at night. The next day I had full flu like symptoms that precluded me from working. What I would do differently: I should have asked the medical team where they wanted to go if ZZZ1 did not work out. If I had that we could have all been prepared to go to a different hospital if the ZZZ1 airport did not work.
Captain flying a C90 aircraft reported landing below minimums.