N850MH
Registered owner: MUSTANG LEASING LLC, NV (owner ≠ operator)
Operators of this aircraft
Who operated this tail, and how firmly we know it.
| Operator | Role | Period | Basis |
|---|---|---|---|
| MAVERICK AIRSTAR LLC (Q2KA) | Certificate holder | — | Matched by certificate designator |
| MAVERICK HELICOPTER INC (M7KA) | Certificate holder | — | Matched by certificate designator |
Accident & incident history
No NTSB accidents or incidents on file for this aircraft.
Maintenance disclosures
ACFT PREPARED TO LAUNCH FOR REVENUE FLT, AN ENGINE CHIP LIGHT ILLUMINATED. ENGINE SHUTDOWN NORMALLY. CHECK OF ELECTRICAL CHIP DETECTOR REVEALED A FEW SMALL METAL SLIVERS BUT SUBSEQUENT INSP REVEALED A SIGNIFICANT NUMBER OF METAL CHIPS ON THE MODULE 5 NON ELECTRIC CHIP DETECTOR. MODULE 1 NON ELECTRIC CHIP DETECTOR WAS FOUND CLEAN. DISCOVERED THE METAL GENERATION WAS NOT A ROUTINE PROBLEM BUT RATHER THE RESULT OF PARTS COMING LOOSE IN THE MODULE & CAUSING FOD TO OCCUR. . IT IS KNOWN THAT A PLUG HAD COME LOOSE FROM THE PRE TU 156 INTERMEDIATE PINION GEAR CENTRAL BORE AND A RETAINING BOLT HEAD SHEARED OFF ALLOWING 2 WASHERS ALONG WITH THE BOLT HEAD TO DROP INTO THE GEARBOX.
DURING ROUTINE 500 HOUR INSPECTION THE PULLEY SPINDLE ON WHICH THE INNER RACE OF THE BEARING IS PRESS FIT WAS FOUND VERY WORN WITH MORE THAN 10" OF THE PROPER SPINDLE DIAMETER WORN AWAY AND SOME CORRESPONDING WEAR ON THE BEARING INNER RACE AND WEAR ON THE HYDRAULIC PUMP DRIVE PULLEYS SPLINED COUPLING SLEEVE. THIS IS THE THIRD INSTANCE OF WHICH WE ARE AWARE OF THIS DEFECT OCCURRING. THE BEARING ITSELF HAD NO APPARENT ROUGHNESS WHEN TURNED BY HAND. SUSPECT SOME PULLEYS OR PERHAPS BEARINGS HAVE BEEN IMPROPERLY MACHINED, DIAMETERS WHICH ALLOW THE INITIAL SLIPPAGE AND SUBSEQUENT CHATTERING DEVELOPS WHICH REMOVES MATERIAL OVER TIME. THIS HAPPENED BETWEEN INSPECTIONS. BELT TENSION MUST BE RELEASED TO DETECT THIS DEFECT AS THE BELT AND THE COUPLING SLEEVE. HELP KEEP THE PULLEY ALIGNED DURING A CURSORY INSPECTION OR WHEN THE AIRCRAFT IS OPERATING. WE INSPECT FOR THIS EACH 100 HOURS.
DURING ROUTINE 500 HOUR INSPECTION THE PULLEY SPINDLE ON WHICH THE INNER RACE OF THE BEARING IS PRESSFIT WAS FOUND VERY WORN WITH MORE THAN .10 INCH OF THE PROPER SPINDLE DIAMETER WORN AWAY AND SOME CORRESPONDING WEAR ON THE BEARING INNER RACE AND WEAR ON THE HYDRAULIC PUMP DRIVE PULLEYS SPLINED COUPLING SLEEVE. THIS IS THE THIRD INSTANCE OF WHICH WE ARE AWARE OF THIS DEFECT OCCURRING. THE BEARING ITSELF HAD NO APPARENT ROUGHNESS WHEN TURNED BY HAND. SUSPECT SOME PULLEYS OR PERHAPS BEARINGS HAVE IMPROPER MACHINED DIAMETERS WHICH ALLOW THE INITIAL SLIPPAGE AND SUBSEQUENT CHATTERING DEVELOPS WHICH REMOVES MATERIAL OVER TIME. THIS HAPPENED BETWEEN INSPECTIONS. BELT TENSION MUST BE RELEASED TO DETECT THIS DEFECT AS THE BELT AND THE COUPLING SLEEVE HELP KEEP THE PULLEY ALIGNED DURING A CURSORY INSPECTION OR WHEN THE AIRCRAFT IS OPERATING. WE INSPECT FOR THIS EACH 100 HOURS.
PILOT REPORTS HAVING AN AMBER GOVERNOR LIGHT IN FLIGHT. UPON AC SHUTDOWN, A FAILURE CODE WAS GENERATED INDICATING THE COLLECTIVE POTENTIOMETER WAS DEFECTIVE. A NEW PART WAS INSTALLED WITH NO FURTHER DEFECT REPORTED. THIS IS A RECURRING PROBLEM FOR THIS PART THAT HAS EFFECTED THE DISPATCH RELIABILITY FOR THIS MODEL AIRCRAFT. AS THIS DESIGN HAS SUCH A HIGH FAILURE RATE PERHAPS AN OPTIC DESIGN WITH NO CONTACT WITH A RESISTANCE RIBBON AS WITH THE CURRENT DESIGN SHOULD BE CONSIDERED. (K)
PILOT REPORTS AMBER GOVERNOR LIGHT ILLUMINATED DURING FLIGHT. A FAULT CODE WAS GENERATED INDICATING THE POTENTIOMETER AS THE LIKELY DEFECTIVE UNIT. A NEW PART WAS INSTALLED AND NO FURTHER DEFECTS WERE NOTED. THIS IS A RECURRING PROBLEM FOR THIS PART THAT HAS EFFECTED THE DISPATCH RELIABILITY FOR THIS AC MODEL. (K)