N855MB
Registered owner: MED-TRANS CORP, TX (owner ≠ operator)
Operators of this aircraft
Who operated this tail, and how firmly we know it.
| Operator | Role | Period | Basis |
|---|---|---|---|
| Med-Trans Corporation (M3XA) | Certificate holder | — | Matched by certificate designator |
Accident & incident history
No NTSB accidents or incidents on file for this aircraft.
Maintenance disclosures
Service Difficulty Reports filed with the FAA for this airframe. Filing is largely voluntary — the number of reports is not a measure of reliability. To verify a report, search its control number at the FAA SDRS site.
5 reports on file, 2016-04-07 – 2025-06-16.
Part: BEARING — FAILED (HYD PUMP) · airframe 4,476 hrs · 11,106 cycles
PILOT PERFORMED A PRECAUTIONARY LANDING FOR #2 HYDRAULICS FAILED IN FLIGHT. MECHANIC DISCOVERED THE HYDRAULIC PUMP BELT HAD SHEARED. DURING REMOVAL IT WAS DISCOVERED THE HYDRAULIC PUMP BEARING FAILED AND CAUSED THE BELT TO SHEAR. MECHANIC REMOVED AND REPLACED THE HYDRAULIC PUMP PULLEY AND BEARING ASSY AND REPLACED THE HYDRAULIC PUMP BELT. BIS.
Part: FILTER — OVERSERVICED (ENGINE BLEED AIR) · airframe 1,988 hrs · 5,007 cycles
PILOT MADE A PL BACK TO HOSPITAL PAD WITH A PATIENT ON BOARD AND REPORTED AFTER 2 MINUTES INTO THE FLIGHT WITH CABIN HEAT APPLIED, CABIN BAGAN TO FILL WITH SMOKE ON THE CEILING. MECHANIC TROUBLESHOT AND FOUND EXCESS INLET BARRIER FILTER FLUID IN THE ENGINE INTAKE PLENUM FROM RECENT FILTER SERVICEING. CLEANED EXCESS FLUID AND PERFORMED ENGINE RUNUP WITH HEATER APPLIED AND NO FURTHER DEFECTS.
Part: PACKING — CUT (HMU) · airframe 788 hrs
5.7 HOURS AFTER COMPLETING AN ENGINE INSPECTION, WHICH INCLUDED CHANGING THE HMU FILTER AND PACKINGS, THE PILOT UPON HIS POST FLIGHT WALK AROUND NOTICED FUEL ON THE UNDERSIDE OF THE FUSELAGE. TO ASSIST IN TROUBLESHOOTING THE PROBLEM, THE PILOT THEN PROCEEDED TO TURN ON THE AIRFRAME BOOST PUMP. THE FUEL WAS FOUND TO BE LEAKING FROM THE ENGINE OVERBOARD DRAIN. THE MECHANIC WAS ADVISED OF THE PROBLEM. AFTER TROUBLESHOOTING THE SYS IT WAS DISCOVERED THAT THE HMU FUEL FILTER PACKING HAD BEEN CUT DURING THE LAST INSPECTION 5.7 HRS PREVIOUSLY. MECHANIC CHANGED THE PACKINGS AND TEST RAN THE ACFT NUMEROUS TIMES, WITH NO DEFECTS NOTED. PAPERWORK WAS COMPLETED AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE.
Part: PACKING — CUT (ENGINE) · airframe 788 hrs · 2,099 cycles
AFTER SHUTDOWN, THE PILOT WAS COMPLETING HIS WALK AROUND & NOTICED FUEL DRIPPING FROM THE ENG OVERBOARD DRAIN TUBE. HE ALSO NOTICED THAT THE FUEL LEAKED ONTO THE BELLY & WAS DRIPPING THERE ALSO. AFTER THE MECHANIC ARRIVED, THEY TURNED ON THE ACFT BOOST PUMP & FUEL WOULD START DRIPPING FROM THE OVERBOARD DRAIN. CONTACTING THE TECHNICAL REPRESENTATIVE, WE WERE TASK WITH CHECKING THE HMU FILTER PACKING, AS THIS IS ONE OF THE EASIEST TASKS TO PERFORM. UPON INSPECTING THE FUEL FILTER PACKING IT WAS DETERMINED TO BE CUT & WAS REPLACED. THE ACFT WAS TEST RAN 3 TIMES WITH NO FUEL LEAK PRESENT. THE PAPERWORK WAS COMPLETED & THE ACFT WAS APPROVED FOR RETURN TO SERVICE. THIS PACKING HAD BEEN REPLACED JUST A FEW HOURS EARLIER AS THE ENG WENT THROUGH AN 800 HOUR INSPECTION. THE PACKING MUST HAVE GOT CUT AT THAT TIME.
Part: PACKING — CUT (FUEL CONTROL) · airframe 788 hrs · 2,099 cycles
FUEL WAS DISCOVERED DRAINING OUT OF THE ENG OVERBOARD DRAIN SYS. FOUND THE FUEL CONTROL, HYDRO MECHANICAL UNIT, PUMP FILTER INTERNAL PACKING CUT.