What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
On 16 March 2025, at 1557(z) the FAA received a preliminary notice regarding an incident involving a C25A landing and experiencing a brake issue resulting in two blown tires, 1 person on board, injuries none, and “aircraft damage extent unknown”. Federal aviation administration (FAA) personnel arrived at the incident scene in at Danbury airport, (dxr) Danbury, CT at 8:35PM local time on 20 March to review the incident area and discussed incident with key personnel.
A cursory examination of the runway area and aircraft were conducted at this time. The aircraft had landed on runway 8, and parallel skid marks, LH noted to be approximately 2740’ long, RH to be approximately 2670’ long, were on the runway, terminating where the aircraft had come to a rest. Both main gear wheel and tire assemblies had been destroyed, with the wheels worn down enough for the lower inner trailing edge of the flaps to impact the runway.
The antiskid system was found in the “on” position. The nitrogen bottle that supplies emergency brakes and gear blow down had been partially expended, with pneumatic pressure gauge found to be down to approximately 1300 PSI, from a level of approximately 2000 PSI. Brake fluid level was found to be normal. Visual observation of the wheel bearings showed them permeated with grease and no indication of overheating. The aircraft was not exceeding gross weight, with fuel gauges showing 3640 lbs. Of fuel.
Maintenance personnel that returned the aircraft to service stated that they did not find any abnormalities with the antiskid, brakes, emergency brakes, or flap systems.
Maintenance log entries reviewed did not find any irregularities. Maintenance personnel from the flight originating airport stated that they verified the nitrogen bottle had been in the green previous to the incident flight, and that the installed tires were in tolerance.
The pilot stated that there were no issues noted on the pre-flight walk around. The pilot also stated that upon landing the left wing seemed to “sink down”, and the pilot stated that he thought the LH tire blew, and when brakes were applied, they seemed to sink toward the floor. The pilot stated the aircraft brakes felt like they had no “traction”, and executed emergency braking procedures.
Reported METAR weather at the time of the occurrence was kdxr 161553Z 19011G23KT 10SM OVC007 15/13 A2999 rmk AO2 SLP155 T01500128
As the FAA filed it
ON 16 MARCH 2025, AT 1557(Z) THE FAA RECEIVED A PRELIMINARY NOTICE REGARDING AN INCIDENT INVOLVING A C25A LANDING AND EXPERIENCING A BRAKE ISSUE RESULTING IN TWO BLOWN TIRES, 1 PERSON ON BOARD, INJURIES NONE, AND “AIRCRAFT DAMAGE EXTENT UNKNOWN”. FEDERAL AVIATION ADMINISTRATION (FAA) PERSONNEL ARRIVED AT THE INCIDENT SCENE IN AT DANBURY AIRPORT, (DXR) DANBURY, CT AT 8:35PM LOCAL TIME ON 20 MARCH TO REVIEW THE INCIDENT AREA AND DISCUSSED INCIDENT WITH KEY PERSONNEL.
A CURSORY EXAMINATION OF THE RUNWAY AREA AND AIRCRAFT WERE CONDUCTED AT THIS TIME. THE AIRCRAFT HAD LANDED ON RUNWAY 8, AND PARALLEL SKID MARKS, LH NOTED TO BE APPROXIMATELY 2740’ LONG, RH TO BE APPROXIMATELY 2670’ LONG, WERE ON THE RUNWAY, TERMINATING WHERE THE AIRCRAFT HAD COME TO A REST. BOTH MAIN GEAR WHEEL AND TIRE ASSEMBLIES HAD BEEN DESTROYED, WITH THE WHEELS WORN DOWN ENOUGH FOR THE LOWER INNER TRAILING EDGE OF THE FLAPS TO IMPACT THE RUNWAY.
THE ANTISKID SYSTEM WAS FOUND IN THE “ON” POSITION. THE NITROGEN BOTTLE THAT SUPPLIES EMERGENCY BRAKES AND GEAR BLOW DOWN HAD BEEN PARTIALLY EXPENDED, WITH PNEUMATIC PRESSURE GAUGE FOUND TO BE DOWN TO APPROXIMATELY 1300 PSI, FROM A LEVEL OF APPROXIMATELY 2000 PSI. BRAKE FLUID LEVEL WAS FOUND TO BE NORMAL. VISUAL OBSERVATION OF THE WHEEL BEARINGS SHOWED THEM PERMEATED WITH GREASE AND NO INDICATION OF OVERHEATING. THE AIRCRAFT WAS NOT EXCEEDING GROSS WEIGHT, WITH FUEL GAUGES SHOWING 3640 LBS. OF FUEL.
MAINTENANCE PERSONNEL THAT RETURNED THE AIRCRAFT TO SERVICE STATED THAT THEY DID NOT FIND ANY ABNORMALITIES WITH THE ANTISKID, BRAKES, EMERGENCY BRAKES, OR FLAP SYSTEMS.
MAINTENANCE LOG ENTRIES REVIEWED DID NOT FIND ANY IRREGULARITIES. MAINTENANCE PERSONNEL FROM THE FLIGHT ORIGINATING AIRPORT STATED THAT THEY VERIFIED THE NITROGEN BOTTLE HAD BEEN IN THE GREEN PREVIOUS TO THE INCIDENT FLIGHT, AND THAT THE INSTALLED TIRES WERE IN TOLERANCE.
THE PILOT STATED THAT THERE WERE NO ISSUES NOTED ON THE PRE-FLIGHT WALK AROUND. THE PILOT ALSO STATED THAT UPON LANDING THE LEFT WING SEEMED TO “SINK DOWN”, AND THE PILOT STATED THAT HE THOUGHT THE LH TIRE BLEW, AND WHEN BRAKES WERE APPLIED, THEY SEEMED TO SINK TOWARD THE FLOOR. THE PILOT STATED THE AIRCRAFT BRAKES FELT LIKE THEY HAD NO “TRACTION”, AND EXECUTED EMERGENCY BRAKING PROCEDURES.
REPORTED METAR WEATHER AT THE TIME OF THE OCCURRENCE WAS KDXR 161553Z 19011G23KT 10SM OVC007 15/13 A2999 RMK AO2 SLP155 T01500128