Date: 202012
Local time of day: 0601-1200
Location: ZZZZ.Airport, FO
Flight conditions: VMC
Light: Daylight
Aircraft: PC-12
Operator: Air Taxi
Operating under: Part 91
Mission: Ferry / Re-Positioning
Flight phase: Landing
ATC / advisory: Tower ZZZZ
Aircraft component: Normal Brake System
Component problem: Failed
Reporter organization: Air Taxi
Reporter function: Pilot Flying; Captain
Reporter qualification: Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Human factors: Troubleshooting
Anomaly: Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
Detector: Person Flight Crew
When detected: In-flight
Result: Aircraft Aircraft Damaged; Flight Crew Landed in Emergency Condition; Flight Crew Executed Go Around / Missed Approach; Flight Crew Diverted; General Maintenance Action
Contributing factors: Aircraft
Primary problem: Aircraft

Narrative: I was scheduled to fly out of ZZZZ to ZZZZ1. While in cruise; I noticed the rudder pedals on the pilot side didn't mobilize as they should when pressed on to engage the brakes. I asked my SIC to perform the same checks on his side and he noted the pedals felt operational. We decided to continue our flight to ZZZZ1 and land taking into consideration that we might not have brake pressure and would have to perform a go-around and diversion to a longer runway. Rain had just ended in our destination and the runway was slightly wet. After touchdown; I try to engage the brakes to verify their status. Brakes started engaging on and off while we rolled on the runway. We decided to go-around. Before diverting to ZZZZ2 we acknowledge the fact that the runway was slightly wet and decided to try landing again. This second landing was firmer than the first one; I; as pilot flying; applied the brakes once more and this time around; no braking action was noticed therefore we decided to perform a go-around and divert to ZZZZ2. After touching down in ZZZZ2; brakes didn't engage appropriately; they were intermittent. After shutting down at the main ramp in ZZZZ2; deplaning and sending the passengers to a lounge; I talked to our mechanic on the phone and we both noted the brake fluid was lower than usual. The company flew another aircraft with a mechanic which happens to be also a pilot. He inspected the brakes visually and noted that the system looks fine. With that assessment; we accepted a ferry permit to fly back to base ZZZZ without passengers; for proper maintenance action. After touchdown in ZZZZ RWY XX and noting the fact that my 'now' SIC is a mechanic; I pushed on the rudder pedals to engage the brakes and try to assess what the issue was. This prompted no braking action. I communicated this to my SIC/Mechanic; and I increased pressure on the rudder pedals trying to note a response from the system with no luck. Eventually; after I kept applying pressure to the rudder pedals; the left and right main gear tires deflated disabling our aircraft in the runway. After this happened; we notified ATC (ZZZZ Tower) and shut down on the runway.




Synopsis: Pilot reported that the brakes did not show any braking action during several landing attempts. Pilot diverted and while attempting to brake upon landing; both main gear tires deflated.