Individually Owned: 150,657
Corporate Owned: 137,281
Ann Arbor Airport
Aircraft Accident/Incident Report
Ann Arbor, Michigan 48104
Sunday, May 5, 1991 17:38 EDT
NTSB Narrative Summary Released at Completion of Accident
THE PLT RPRTD THAT DURING FLT, HE NOTED RPM FLUCTUATIONS & A WARNING BUZZER. HE ADJUSTED THE THROTTLE TO 100% & NOTED THAT ALL GAGES WERE 'IN THE GREEN.' HE CHECKED THE CARBURETOR (CARB) HEAT GAGE & NOTED IT WAS ONE NEEDLE WIDTH ABOVE THE YELLOW SECTION & THAT THE OUTSIDE AIR TEMP WAS 9 DEG C (48 DEG F). WITH THESE INDCNS, HE DISCOUNTED CARB ICE & DID NOT APPLY CARB HEAT. SUBSEQUENTLY, THE ENG LOST ADDITIONAL POWER BEFORE THE PLT COULD REACH THE RWY. DURING AN EMERG LANDING, THE HELICOPTER ROLLED OVER. AN EXAM & SUBSEQUENT ENG RUN REVEALED NO MECHANICAL ANOMALIES, EXCEPT THAT THE CARB AIR TEMP GAGE WAS INDICATING 4 DEG C ABOVE THE ACTUAL TEMP. TEMP & DEW POINT AT ANN ARBOR WERE 51 & 50 DEG F, RESPECTIVELY. ACCORDING TO CARB ICE CHARTS, CONDITIONS WERE CONDUCIVE TO CARB ICE.
NTSB Probable Cause Narrative
LOSS OF ENGINE POWER DUE TO CARBURETOR ICE, AND THE PILOT'S FAILURE TO USE CARBURETOR HEAT. FACTORS RELATED TO THE ACCIDENT WERE: CARBURETOR ICING CONDITIONS, AND A FALSE INDICATION FROM THE CARBURETOR AIR TEMPERATURE GAGE.
Event Information
| Type of Event | Accident |
| Event Date | 5/5/1991 |
| Event Day of the Week | Sunday |
| Time of Event | 1738 |
| Event Time Zone | Eastern Daylight Time |
| Event City | ANN ARBOR |
| Event State | MICHIGAN |
| Event Country | -- |
| Zipcode of the event site | 48104 |
| Event Date Year | 1991 |
| Event Date Month | 5 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | ANN ARBOR |
| Event Location Nearest Airport ID | |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | 0 |
| Degrees magnetic from airport | 0 |
| Airport Elevation | 840 |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1738 Eastern Standard Time |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | ARB |
| Elevation of weather observation facility | 840 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | EST |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 1000 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Partial Obscuration |
| Sky Condition for Lowest Ceiling | Overcast |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 2 |
| Air Temperature at event time (in degrees celsius) | 11 |
| Dew Point at event time (in degress fahrenheit) | 10 |
| Wind Direction (degrees magnetic) | 130 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 14 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Unknown |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 29 |
| Density Altitude (feet) | 0 |
| Intensity of Precipitation | Light |
| METAR weather report | -- |
| Event Highest Injury | Minor |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | 1 |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 460 |
| NTSB Notification Source | -- |
| NTSB Notification Date | May 5 1991 12:00AM |
| NTSB Notification Time | 1800 |
| Fiche Number and/or location -used to find docket information | 43818 |
| Date of most recent change to record | Dec 12 2000 9:58AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Instrument Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N2360K |
| NTSB Number | CHI91LA146 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | Unknown |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | ROBINSON |
| Aircraft Model | R22 BETA |
| Aircraft Series Identifier | R22 BETA |
| Aircraft Serial Number | 0525 |
| Certified Max Gross Weight | 2400 |
| Aircraft Category | Helicopter |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 2 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | 100 Hour |
| Date of Last Inspection | Apr 4 1971 12:00AM |
| Airframe hours since last inspection | 30 |
| Airframe Hours | -- |
| ELT Installed | Unknown |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | UNKNOWN |
| Aircraft Owner Street Address | |
| Aircraft Owner City | |
| Aircraft Owner State | |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | |
| Operator is an individual? | -- |
| Operator Name | LUTZ, ROBERT A |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | 3966 PLEASANT LAKE RD. |
| Operator City | ANN ARBOR |
| Operator State | MI |
| Operator Country | |
| Operator Zip code | 48103 |
| Operator Code | |
| Owner has at least one certificate | None |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | Unknown |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | -- |
| Indicates Domestic or International Flight | -- |
| Operator carrying Pax/Cargo/Mail | -- |
| Type of Flying (Per_Bus / Primary) | Personal |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | PRIV |
| Departure City | ANN ARBOR |
| Departure State | MI |
| Departure Country | |
| Departure Time | 1710 |
| Departure Time Zone | EST |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | |
| Destination City | |
| Destination State | |
| Destination Country | |
| Specific Phase of Flight | Landing |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:35AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 0 |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |