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Accident occurred MAR-31-97 at BUNNELL, FL
Aircraft: Charles Keuthan ZEPHYR II, registration: N52958
Injuries: 1 Serious.
On March 31, 1997, about 1730 eastern standard time, a homebuilt
Zephyr II, N52958, registered to a private individual, experienced a hard landing during a
forced landing at the Flagler County Airport, Bunnell, Florida. Visual meteorological
conditions prevailed at the time and no flight plan was filed for the 14 CFR Part 91
personal flight. The airplane was substantially damaged and the private-rated pilot, the
sole occupant sustained serious injuries. The flight originated about 5 minutes earlier
from the Flagler County Airport. The pilot stated that during the upwind leg after takeoff
about 300 feet above ground level (agl), the engine experienced an rpm drop from 6,200 to
between 2,500 and 3,000. He then initiated a turn downwind and then again turned upwind
and when the flight was about 75 feet agl, he encountered loss of elevator control. The
airplane then descended nose low and impacted the ground adjacent to the intended
touchdown location.
Accident occurred APR-08-97 at WINTER HAVEN, FL
Aircraft: Basinski KOLB MK3, registration: N128BB
Injuries: 1 Fatal.
On April 8, 1997, about 1200 eastern daylight time, a Basinski,
Kolb MK3, N128BB, registered to Lakeland Ultralight Inc., operating as a 14 CFR Part 91
personal flight, crashed while maneuvering in the vicinity of Winter Haven's Gilbert
Field, Winter Haven, Florida. Visual meteorological conditions prevailed and no flight
plan was filed. The airplane was destroyed. The commercial pilot was fatally injured. The
flight originated from Lake Jessie abeam Browns Seaplane Base, Winter Haven, Florida,
about 1 minute before the accident. Witnesses located at Browns Seaplane Base, and boaters
located on Lake Jessie, at Winter Haven, observed the airplane making touch-and-go
landings to the lake. The airplane took off to the north and turned to the west. Blue and
white colored smoke was observed coming from the vicinity of the engine. The airplane
appeared to lose forward airspeed while in a climb at about 100 to 200 feet. The left wing
dropped down between 45 to 90 degrees, the airplane entered a spin to the left, colliding
with a house trailer and the ground.
Accident occurred MAR-23-97 at PENN VALLEY, CA
Aircraft: Zenair 601, registration: N4073T
Injuries: 1 Fatal.
On March 23, 1997, at 0849 hours Pacific standard time, an
experimental, amateur built, Zenair 601, N4073T, impacted terrain in a pasture during an
off-airport emergency landing near Penn Valley, California. The aircraft was destroyed and
the private pilot was fatally injured. Visual meteorological conditions prevailed for the
personal flight which departed from Nevada County Airport at Grass Valley, California,
about 0830. A witness who lives about 1 mile from the accident site reported that the
aircraft's engine was "cutting out" as it flew over his location. Another
witness, inside his home near the accident site, did not hear the engine at all; he
reported hearing only a "whoosh" and a "thump".
The aircraft was engaged on a local flight in the area of the
Lady Bower Dams. Shortly before reaching the dams and at a height of 4,000 feet, the
engine stopped. The area around the dams was of rugged terrain with very few areas
suitable for landing a light aircraft. The pilot chose a field but when committed to the
forced landing saw that the field was on a steep upward slope. During the landing the
aircraft's landing gear collapsed.
Initial examination of the engine indicated that it had seized,
with no other external indications of mechanical failure. Subsequent strip examination of
the engine by the pilot revealed that there had been a major failure of the rear cylinder
'big end' bearing, but further examination found no fault within the lubrication oil
injection system.
Similar seizures of Rotax 582 engines have occurred and three
earlier AAIB Bulletins (i.e. 12/95, page 55, 10/96, page 29 and 5/97, page 63) which
reported on engine seizures on a Renegade Spirit, a Kolb Twinstar and a Avid Speed Wing,
drew attention to this problem. Although no statistics appear to be available, the Popular
Flying Association advised that there had been a history of big-end failures on Rotax 582
engines, due to worn bearings. This was particularly the case for engines installed in
heavier aeroplanes and those used in the training role which use extended running at high
power. There were also indications that long periods without use could be detrimental.
'Drying' of the roller type bearings may occur and residual products of combustion, which
can be significantly acidic, can accelerate corrosion of the bearing materials. If
corrosion occurs, this preconditions the bearings to wear rapidly when used subsequently,
although it may then take several flights for the bearings to deteriorate to the point of
failure.
The largest service centre for Rotax engines in the UK has
devised an instrument, the 'Cyclone Conrod Bearing Clearance Tester', for testing the
combined big/little-end bearing clearances, which has apparently proved extremely
effective in preventing such failures.
The Bearing Clearance Tester is essentially a dial gauge mounted
on an extension tube which screws into the spark-plug holes and bears on the piston crown
when at top dead centre. A syringe is used to 'suck/blow' the piston up and down, the
difference in gauge readings being converted into combined bearing clearance. The
instructions recommend that this check be performed every 12.5 flight hours when the
spark-plugs are removed for inspection in accordance with the Rotax service schedule.
Maximum wear figures are provided with the instrument, but records should also be kept so
that any trend can be detected in advance. It is understood that the Popular Flying
Association acknowledges that this device has been effective in preventing failures of
this nature and has published an article entitled 'KNOW YOUR BIG END WEAR' in the December
'95/January '96 edition of its magazine, 'Popular Flying.'
At the time of the accident the engine had achieved 730 hours
since manufacturer. At 298 hours since manufacture the engine's crankshaft failed and the
engine was rebuilt by a manufacturer's approved agent. Between 5 and 6 hours before the
accident the pilot and an engineering friend had performed a check of the big end bearing
wear using the 'Cyclone Conrod Bearing Clearance Tester'. The rear cylinder bearing wear
was found to be 0.015 inch, which was within the limits specified.
BOBCAT1 CTRL#: 90042600122 NNUM: 60RT FSDO: SW17 TT: 46
ENGINE: ROTAX ROTAX377
S/N: 19853534899 TSO: 46
PROPELLER: S/N: ATACODE: 7200
COMPONENT: S/N:
PART: ENGINE QUIT P/N:
PRECAUTIONARY PROCEDURE: NONE
NATURE OF CONDITION: OTHER
STAGE OF OPERATION:
REMARKS:
THIS ENGINE HAS QUIT RUNNING APPROXIMATELY 3 TIMES. THE LAST TIME IT CAUSED AN ACCIDENT.
IT WAS SENT TO THE MANUFACTURER AFTER IT QUIT 1 TIME AND THEY COULD NOT DETERMINE WHY IT
QUIT. INSPECTOR SUSPECTS FUEL FILTER CLOGGING AND/OR CARBURETOR ICE.
QUICKSILVER CTRL#: 93061100084 NNUM: FSDO: CE07 TT: 0
ENGINE: ROTAX ROTAX447
S/N: TSO: 0
PROPELLER: S/N: ATACODE: 8530
COMPONENT: S/N:
PART: PISTON ENGINE REAR BURNED P/N:
PRECAUTIONARY PROCEDURE: UNSCHED LAND
NATURE OF CONDITION: ENG STOPPAGE
STAGE OF OPERATION:
REMARKS:
EXPERIENCED AN ENGINE FAILURE AT APPROXIMATELY 500 FEET AGL. A SAFE EMERGENCY LANDING WAS
MADE. EXAMINATION REVEALED THE THREE OF THE FOUR HEX-HEAD BOLTS THAT HOLD THE COOLING FAN
HOUSING ON HAD SHEARED OFF. THE FOURTH BOLT HAD BACKED OUT APPROXIMATELY 90 PERCENT.
RESULT WAS THE LOSS OF TENSION ON COOLING FAN BELT AND THE LOSS OF COOLING TO THE ENGINE.
FRIED REAR PISTON. DEALER SAID THAT NONE OF THE HEX-HEAD BOLTS HAD ANY LOCK-TITE ON THE
THREADS, AS THEY NORMALLY DO (ACCORDING TO THE DEALER) FROM THE FACTORY.
QUICKSILVER CTRL#: 93120900005 NNUM: FSDO: CE07 TT: 0
ENGINE: ROTAX ROTAX447
S/N: TSO: 0
PROPELLER: S/N: ATACODE: 8500
COMPONENT: S/N:
PART: ENGINE REAR CYLINDER FAILED P/N:
PRECAUTIONARY PROCEDURE: UNSCHED LAND
NATURE OF CONDITION: ENG STOPPAGE
STAGE OF OPERATION:
REMARKS:
WHILE FLYING AT APPROXIMATELY 150 FEET AGL, THE ENGINE SUDDENLY QUIT WITH AN EMERGENCY
LANDING IN TALL GRASS. GRASS WRAPPED AROUND AXLE AND TUBING CAUSING CRASH WITH DAMAGE AND
MINOR INJURIES. AT TIME OF FAILURE, CHT - 350, EGT - 1175, RPM - 5500. UPON EXAMINING THE
ENGINE, IT WAS FOUND THAT THE REAR PISTON/RING ASSEMBLY HAD 'FRIED' FOR NO APPARENT
REASON. SAME THING HAPPENED 15 HOURS EARLIER AND ENGINE HAD BEEN REBUILT.
QUICKSILVER CTRL#: 93081600105 NNUM: FSDO: GL13 TT: 0
ENGINE: ROTAX ROTAX447
S/N: TSO: 0
PROPELLER: S/N: ATACODE: 8500
COMPONENT: S/N:
PART: ENGINE REAR PISTON OVERHEAT P/N:
PRECAUTIONARY PROCEDURE: UNSCHED LAND
NATURE OF CONDITION: ENG STOPPAGE
STAGE OF OPERATION:
REMARKS:
EXPERIENCED AN ENGINE FAILURE AT APPROXIMATELY 500 FEET AGL. A SAFE EMERGENCY LANDING WAS
MADE. EXAMINATION REVEALED THE THREE OF THE FOUR HEX-HEAD BOLTS THAT HOLD THE COOLING FAN
HOUSING ON HAD SHEARED OFF. THE FOURTH BOLT HAD BACKED OUT APPROXIMATELY 90 PERCENT.
RESULT WAS THE LOSS OF TENSION ON COOLING FAN BELT AND THE LOSS OF COOLING TO THE
ENGINE.FRIED REAR PISTON. DEALER SAID THAT NONE OF THE HEX-HEAD BOLTS HAD ANY LOCK-TITE ON
THE THREADS AS THEY NORMALLY DO (ACCCORDING TO THE DEALER) FROM THE FACTORY.
XP503 CTRL#: 87112400033 NNUM: 171RB FSDO: GL17 TT: 71
ENGINE: ROTAX ROTAX503
S/N: TSO: 71
PROPELLER: S/N: ATACODE: 7320
COMPONENT: S/N:
PART: CARB ATTACHMENT ENGINE SEPARATED P/N:
PRECAUTIONARY PROCEDURE: NONE
NATURE OF CONDITION: ENG STOPPAGE
STAGE OF OPERATION:
REMARKS:
THE CARBURETOR WAS ATTACHED TO THE POWERPLANT WITH A HOSE AND A CLAMP AT EACH END OF THE
HOSE. THE NOSE ON THE POWERPLANT WITH A HOSE AND A CLAMP AT EACH END OF THE HOSE. THE HOSE
ON THE POWERPLANT END CAME OFF OF ITS ATTACHMENT POINT. THE ENGINE QUIT AND THE CARBURETOR
WENT INTO THE ROTATING PROPELLER.
CHALLENGER2 CTRL#: 90042600055 NNUM: 91269 FSDO: GL13 TT: 0
ENGINE: ROTAX ROTAX503
S/N: 3641837 TSO: 0
PROPELLER: S/N: ATACODE: 8520
COMPONENT: S/N:
PART: CRANKSHAFT BROKE P/N:994562
PRECAUTIONARY PROCEDURE: NONE
NATURE OF CONDITION: OTHER
STAGE OF OPERATION:
REMARKS:
CRANKSHAFT BROKE IN THE CENTER SECTION. BREAK CAUSED BY PTO END BEARING FAILURE. FAILURE
OF BEARINGS CAUSED BY A BOLT THAT HAD PREVIOUSLY BROKEN ON BELT DRIVE ADAPTER WHERE IT
BOLTED TO THE MOTOR, CAUSING UNEQUAL PRESSURE ON THE PTO BEARINGS, CAUSING STRESS AND
OVERHEATING OF THEM.
CHALLENGER2 CTRL#: 90092600179 NNUM: 87DE FSDO: GL17 TT: 318
ENGINE: ROTAX ROTAX503
S/N: 3882432 TSO: 318
PROPELLER: S/N: ATACODE: 7322
COMPONENT: 54 S/N:
PART: JET CLOGGED P/N:5413817501
PRECAUTIONARY PROCEDURE: UNSCHED LAND
NATURE OF CONDITION: ENG FLAMEOUT
STAGE OF OPERATION:
REMARKS:
AIRCRAFT EXPERIENCED POWER LOSS ON TAKEOFF, PILOT COMPLETED FORCED LANDING. MINOR DAMAGE
TO AIRCRAFT. POWER LOSS CAUSED BY FUEL CONTAMINATION. SUBMITTER RECOMMENDS PROPER HANDLING
OF FUEL AND ADDITIONAL FILTER.
TWINSTAR CTRL#: 92012900093 NNUM: FSDO: GL03 TT: 0
ENGINE: ROTAX ROTAX503
S/N: TSO: 0
PROPELLER: S/N: ATACODE: 8530
COMPONENT: S/N:
PART: PISTON FAILED P/N:
PRECAUTIONARY PROCEDURE: UNSCHED LAND
NATURE OF CONDITION: ENG FLAMEOUT
STAGE OF OPERATION:
REMARKS:
THE WRIST PIN ON THE PTO SIDE WORE DOWN, POSSIBLY DUE TO A SEIZED NEEDLE BEARING. THE
PISTON DEVELOPED EXCESSIVE PLAY AND EVENTUALLY SKIRT CONTACTED THE CYLINDER WALL AND BROKE
OFF. THE CYLINDER SCORED, LOST COMPRESSION AND THE SPARK PLUG GAP WAS CLOSED BY THE
DEBRIS. ENGINE LOST POWER AND AN UNEVENTFUL LANDING MADE IN FIELD.
CHALLENGER2 CTRL#: 92060100065 NNUM: 229TX FSDO: SO15 TT: 47
ENGINE: ROTAX ROTAX503
S/N: K1495A TSO: 0
PROPELLER: S/N: ATACODE: 8520
COMPONENT: S/N:
PART: BEARING CRANKSHAFT FAILED P/N:
PRECAUTIONARY PROCEDURE: NONE
NATURE OF CONDITION: OTHER
STAGE OF OPERATION:
REMARKS:
OWNER REPLACED PLASTIC CAGED CRANKSHAFT BEARING WITH A STEEL CAGE BEARING. BEARING CAGE
SHATTERED AT 47 HOURS TIS.
CHALLENGER2 CTRL#: 93081600109 NNUM: 418JR FSDO: GL03 TT: 8
ENGINE: ROTAX ROTAX503 S/N: 3787363 TSO: 0
PROPELLER: S/N: ATACODE: 7421
COMPONENT: S/N:
PART: SPARK PLUG FRONT PLUG FOULED P/N:B8ES
PRECAUTIONARY PROCEDURE: UNSCHED LAND
NATURE OF CONDITION: ENG FLAMEOUT
STAGE OF OPERATION:
REMARKS:
FRONT SPARK PLUG OIL FOULED CAUSING LOSS OF POWER AND FORCED LANDING. RECOMMEND ENGINE
MANUFACTURER DEVELOP A DUEL IGNITION SYSTEM.
CHALLENGER2 CTRL#: 93110200095 NNUM: 851BZ FSDO: SW01 TT: 200
ENGINE: ROTAX ROTAX503
S/N: TSO: 0
PROPELLER: S/N: ATACODE: 8510
COMPONENT: S/N:
PART: DRIVE UNIT PROPELLER FAILED P/N:HTD221
PRECAUTIONARY PROCEDURE: OTHER
NATURE OF CONDITION: IN-FLIGHT SEP
STAGE OF OPERATION:
REMARKS: THE HAGER UNIT THE WOODEN PROPELLER IS MOUNTED TO IS BELT DRIVEN AND EXPERIENCED
A BEARING FAILURE OR THE REAR LOCKNUT CAME LOOSE. THE REAR BEARING WAS OVERHEATED, BUT
REMAINED INTACT. THE PROPELLER SEPARATED IN-FLIGHT.
QUICKSILVER CTRL#: 93120900012 NNUM: FSDO: CE07 TT: 0
ENGINE: ROTAX ROTAX503 S/N: TSO: 0
PROPELLER: S/N: ATACODE: 7322
COMPONENT: 45 S/N:
PART: JET NEEDLE CARBURETOR SHEARED P/N:8L2
PRECAUTIONARY PROCEDURE: UNSCHED LAND
NATURE OF CONDITION: ENG STOPPAGE
STAGE OF OPERATION:
REMARKS:
IN-FLIGHT, ENGINE FAILURE OCCURRED WHEN REAR CYLINDER JET NEEDLE BROKE OFF WHERE C-CLIP
RUBS IN ADJUSTMENT GROOVE. THERE WAS NO WARNING, BUT LATER CLUES: EGT AND CHT WILL BE MUCH
LOWER THAN OTHER CARBURETOR/CYLINDER (IN DUAL CARBURETOR SET-UPS), ENGINE MAY IDLE, BUT
LACK POWER AND TURN ROUGH ABOVE IDLE SPEED. EARLIER SUGGESTION TO CHECK JET NEEDLE EVERY
10 HOURS IS NOT RESPONSIBLE. ROTAX MAINTENANCE SCHEDULE ONLY CALLS FOR NEEDLE REPLACEMENT
EVERY 150 HOURS.
PANTHER2 CTRL#: 89122800059 NNUM: 22KK FSDO: SW99 TT: 0
ENGINE: ROTAX ROTAX532 S/N: TSO: 0
PROPELLER: S/N: ATACODE: 7200
COMPONENT: S/N:
PART: LOW POWER P/N:
PRECAUTIONARY PROCEDURE: UNSCHED LAND
NATURE OF CONDITION: ENG FLAMEOUT
STAGE OF OPERATION:
REMARKS:
INVESTIGATED ACCIDENT THAT INVOLVED THIS AIRCRAFT. BASED UPON THIS INVESTIGATION AND
INTERVIEW WITH THE PILOT, THE AIRCRAFT APPEARS TO HAVE LACKED ADEQUATE POWER TO SUSTAIN
FLIGHT UNDER THE METEOROLOGICAL CONDITIONS WHICH EXISTED ON THE DATE OF THE ACCIDENT (84
DEGREE FAHRENHEIT, 70 DEGREE DP). SUBMITTER RECOMMENDS MANUFACTURER ANALYZE
ENGINE/PROPELLER CAPABILITIES AND POWER OUTPUT UNDER THE CONDITIONS NOTED.
AVID FLYER CTRL#: 91020500048 NNUM: 88SN FSDO: GL03 TT: 120
ENGINE: ROTAX ROTAX532
S/N: 3672016 TSO: 120
PROPELLER: S/N: ATACODE: 8530
COMPONENT: S/N:
PART: BEARING WRIST PIN FAILED P/N:932904
PRECAUTIONARY PROCEDURE: UNSCHED LAND
NATURE OF CONDITION: VIB/BUFFET ENG FLAMEOUT
STAGE OF OPERATION:
REMARKS:
ENGINE FAILED DURING CRUISE FLIGHT. DEBRIS FROM BEARING CAGE WAS INGESTED INTO COMBUSTION
CHAMBER AND CAUSED LOSS OF COMPRESSION. CAGELESS BEARINGS ARE MARKETED AS A FIX.
AVID FLYER CTRL#: 93020900042 NNUM: FSDO: CE07 TT: 0
ENGINE: ROTAX ROTAX532 S/N: TSO: 0
PROPELLER: S/N: ATACODE: 7421
COMPONENT: S/N:
PART: PLUG CONNECTOR FAILED P/N:B-8ES
PRECAUTIONARY PROCEDURE: NONE
NATURE OF CONDITION: ENG FLAMEOUT
STAGE OF OPERATION:
REMARKS:
THE SPARK PLUG CONNECTOR HELD TIGHT TO THE SPARK PLUG, BUT THE NGK B8ES PLUG HAD A SCREW
ON THE END. THE VIBRATION OF THE ENGINE LOOSENED THE SCREW ON THE END AND SPARKING ERODED
THE SCREW THREADS UNTIL THEY LET GO AND THE PLUG CONNECTOR FELL OFF THE PLUG. RPM DROPPED
TO 4500 AND EGT ON THAT CYLINDER DROPPED TO ZERO.
AVID FLYER CTRL#: 93120900002 NNUM: FSDO: CE07 TT: 0
ENGINE: ROTAX ROTAX532 S/N: TSO: 0
PROPELLER: S/N: ATACODE: 8500
COMPONENT: S/N:
PART: ENGINE RADIATOR OVERHEAT P/N:
PRECAUTIONARY PROCEDURE: NONE
NATURE OF CONDITION: OVER TEMP
STAGE OF OPERATION:
REMARKS:
EVERY SUMMER THE ENGINE RUNS AT REDLINE ON WATER TEMPERATURE IN CRUISE. REBUILT RADIATOR
MOUNT TO SWING AFT EDGE OF RADIATOR OUTBOARD 2.50 INCHES. REBUILT RADIATOR SCOOP TO
ACCOMMODATE MODIFICATION TO THE RADIATOR MOUNT. NO OTHER CHANGETO COOLING SYSTEM. BROUGHT
THE WATER TEMPERATURE DOWN 25 DEGREES IN CRUISE AT THE SAME ATMOSPHERIC CONDITION AS
BEFORE. NO NOTICEABLE DECREASE IN CRUISE SPEED.
AVID FLYER CTRL#: 94062700236 NNUM: 151JM FSDO: SO17 TT: 0
ENGINE: ROTAX ROTAX582 S/N: TSO: 0
PROPELLER: S/N: ATACODE: 8500
COMPONENT: S/N:
PART: ENGINE CARBURETOR FAILED P/N:
PRECAUTIONARY PROCEDURE: UNSCHED LAND
NATURE OF CONDITION: ENG STOPPAGE
STAGE OF OPERATION:
REMARKS:
AT APPROXIMATELY 1,500 FEET MSL WHILE DESCENDING FROM 7,500 FEET MSL FOR LANDING AT PALM
BEACH COUNTY PARK (LNA), THE ENGINE STOPPED DEVELOPING POWER AND THE PILOT MADE AN
OFF-AIRPORT LANDING. PILOT STATED BECAUSE OF THE EXTENDED TIME IN THE DESCENT, THE
CARBURETOR ACCUMULATED ICE CAUSING ENGINE TO STOP DEVELOPING POWER. AIRCRAFT SAT ON GROUND
FOR A TIME THEN PILOT STATED IT GROUND RAN OKAY AND PILOT FLEW TO DESTINATION. ENGINE DOES
NOT HAVE A CARBURETOR HEATER INSTALLED OR PROVIDED BY MFG.
QUICKSILVER CTRL#: 94070500044 NNUM: FSDO: GL03 TT: 0
ENGINE: ROTAX ROTAX582 S/N: TSO: 0
PROPELLER: S/N: ATACODE: 8500
COMPONENT: S/N:
PART: ENGINE PISTON SEIZED P/N:
PRECAUTIONARY PROCEDURE: UNSCHED LAND
NATURE OF CONDITION: ENG STOPPAGE
STAGE OF OPERATION:
REMARKS:
ENG 582 HAD 35 HOURS SINCE NEW, NORMAL USAGE AND GOOD MAINTENANCE. THE ENGINE SEIZED
WITHOUT WARNING OR SHOWING OVERHEATING ON THE GAUGES. THE FRONT CYLINDER/PISTON MELTED AND
THE CONNECTING ROD BROKE. MINOR DAMAGE TO AIRFRAME ON LANDING. INVESTIGATION WAS NOT ABLE
TO DETERMINE CAUSE OF THE PROBLEM.
AVID FLYER CTRL#: 94110400728 NNUM: 347AV FSDO: GL03 TT: 102
ENGINE: ROTAX ROTAX582 S/N: TSO: 0
PROPELLER: S/N: ATACODE: 8550
COMPONENT: S/N:
PART: ROTARY VALVE ENG OIL SYS FAILED P/N:935730
PRECAUTIONARY PROCEDURE: OTHER
NATURE OF CONDITION: ENG STOPPAGE
STAGE OF OPERATION:
REMARKS:
FAILURE OF ROTARY VALVE IN LUBRICATION SYSTEM CAUSED ENGINE TO SEIZE DUE TO A LACK OF
LUBRICATION. OIL VENT LINE MAY HAVE BEEN OBSTRUCTED TO CAUSE CAVITATION IN LUBRICATION
SYSTEM.
CH701 CTRL#: 95082500620 NNUM: 701ZA FSDO: CE03 TT: 414
ENGINE: ROTAX ROTAX582 S/N: 4016584 TSO: 0
PROPELLER: S/N: ATACODE: 8530
COMPONENT: S/N:
PART: GEAR ROTARY VALVE TEETH SHEARED P/N:935730
PRECAUTIONARY PROCEDURE: OTHER
NATURE OF CONDITION: VIB/BUFFET ENG FLAMEOUT
STAGE OF OPERATION:
REMARKS:
ROTARY VALVE GEAR OIL SUMP FASTENER BROKE AND SUMP FELL TO A LOWER LEVEL THAN THE
CRANKSHAFT. LACK OF LUBRICATION FROM SUMP CAUSED BRASS ROTARY VALVE GEAR TO SHEAR OFF ITS
TEETH. RESULT WAS THE ROTARY VALVE SLIPPED AND BECAME OUT OF TIME WITH ENGINE; THUS,
ROUGHNESS AND POWER LOSS OCCURRED.
FLIGHTSTAR CTRL#: 95110600088 NNUM: 93FS FSDO: SO09 TT: 86
ENGINE: ROTAX ROTAX582 S/N: 4317143 TSO: 0
PROPELLER: S/N: ATACODE: 8530
COMPONENT: S/N:
PART: OIL SEAL ROTARY VALVE LEAKING P/N:850710
PRECAUTIONARY PROCEDURE: NONE
NATURE OF CONDITION: OTHER
STAGE OF OPERATION:
REMARKS:
AFTER TOTAL ENGINE FAILURE WITH NO WARNING, ROTARY VALVE SHAFT WAS FOUND DEFECTIVE. ROTARY
VALVE SPLINES WERE FOUND MEL TED OFF. FAILURE WAS FOUND TO BE DUE TO ROTARY VALVE OIL
BEING DILUTED BY WATER. WATER WAS FOUND IN ROTARY VALVE OIL T ANK. SEAL HAD FAILED.
INSPECTED THREE OTHER AIRCRAFT AND FOUND SAME PROBLEM. SUBMITTER STATED THIS IS AN
EXPERIMENTAL AIRCRAFT, BUT A PROBLEM NEEDS TO BE ADDRESSED.
KITFOX CTRL#: 96040500653 NNUM: 548CM FSDO: GL03 TT: 162
ENGINE: ROTAX ROTAX582 S/N: TSO: 0
PROPELLER: S/N: ATACODE: 8500
COMPONENT: S/N:
PART: ENGINE IGNITION FAILED P/N:
PRECAUTIONARY PROCEDURE: OTHER
NATURE OF CONDITION: OTHER
STAGE OF OPERATION:
REMARKS:
IT WAS REPORTED AN ENGINE BEARING FAILED CAUSING THE INTERNAL TIMING TO CHANGE LEADING TO
ENGINE STOPPAGE DUE TO INCORRE CT IGNITION TIMING.
MINI500 CTRL#: 96091200557 NNUM: 500ZZ FSDO: CE05 TT: 0
ENGINE: ROTAX ROTAX582 S/N: 4655214 TSO: 0
PROPELLER: S/N: ATACODE: 8530
COMPONENT: S/N:
PART: PISTON SKIRT UNDERSIZE P/N:
PRECAUTIONARY PROCEDURE: NONE
NATURE OF CONDITION: ENG FLAMEOUT
STAGE OF OPERATION: REMARKS:
THE ENGINE BACKFIRED AND MOMENTARILY HAD A LOSS OF POWER. THE PISTONS WERE FOUND
UNDERSIZED AT THE SKIRT END. THIS COU LD HAVE POSSIBLY BEEN CAUSED BY IMPROPER BREAK IN
PROCEDURES.
XP503 CTRL#: 97011600505 NNUM: FSDO: AUS TT: 0
ENGINE: ROTAX ROTAX582 S/N: TSO: 0
PROPELLER: S/N: ATACODE: 8500
COMPONENT: S/N:
PART: ENGINE ENGINE (RECIPROC FAILED P/N:
PRECAUTIONARY PROCEDURE: UNSCHED LAND
NATURE OF CONDITION: VIB/BUFFET ENG STOPPAGE
STAGE OF OPERATION:
REMARKS:
(AUS) ENGINE RAN ROUGH AND STOPPED - AIRCRAFT LANDED IN SHALLOW WATER ON BEACH DAMAGING
ELEVATOR AND ELEVATOR CONTROL ROD - THIS DEFECT WAS RECEIVED FROM THE AUF AND IS FOR
INFORMATION ONLY
KITFOX CTRL#: 96053000010 NNUM: 42AR FSDO: WP25 TT: 60
ENGINE: ROTAX ROTAX912 S/N: 4005261 TSO: 0
PROPELLER: S/N: ATACODE: 7414
COMPONENT: S/N:
PART: POINTS ENGINE IGNITION FAILED P/N:
PRECAUTIONARY PROCEDURE: OTHER
NATURE OF CONDITION: ENG STOPPAGE
STAGE OF OPERATION:
REMARKS: ENGINE FAILED ON TAKEOFF. FOUND METAL FILINGS AROUND TRIGGER POINTS WHICH
GROUNDED OUT IGNITION SYSTEM. UNABLE TO FIND WHERE FILINGS CAME FROM.
MITCHELLB10 CTRL#: 80052100080 NNUM: 80521 FSDO: CE64 TT: 5
ENGINE: YAMAHA KT100S
S/N: 78708364 TSO: 5
PROPELLER: S/N: ATACODE: 8530
COMPONENT: S/N:
PART: PISTON SKIRT BROKEN P/N:78701
PRECAUTIONARY PROCEDURE: NONE
NATURE OF CONDITION: OTHER
STAGE OF OPERATION:
REMARKS: SKIRT OF PISTON BROKE.PARTS FELL INTO SPARK PLUG.
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