Individually Owned: 150,657
Corporate Owned: 137,281
Lake Wales Municipal Airport
Aircraft Accident/Incident Report
Lake Wales, Florida 33853
Thursday, May 1, 1997 17:00 EDT
NTSB Narrative Summary Released at Completion of Accident
The certified flight instructor (CFI) was demonstrating a 180 degree turn autorotation with a power recovery. The CFI entered the maneuver approximately 600 feet above the ground. About 3/4 through the 180 degree turn, he noticed that the rotor speed was low. When the CFI decided to return the throttle to full power, there was no engine response. The CFI continued the approach, which resulted in a hard landing on the heel of the left skid, and the helicopter rolling over. Examination of the helicopter failed to disclose a mechanical problem or a system malfunction. During a functional check of the engine, it operated between idle and a moderated power range. Examination of the airframe disclosed that the skids were spread, and the landing gear damper assembly was fractured. According to FAA Advisory Circular, AC 61-13A, during the flare phase of an autorotation, the cyclic control should be moved forward to level the helicopter in preparation for landing. The advisory circular also stated that 'if a landing is to be made, allow the helicopter to descend vertically. Apply collective pitch smoothly to check the descent and cushion the landing.'
NTSB Probable Cause Narrative
loss of engine power for undetermined reason(s); and the flight instructor's improper flare and improper use of the flight controls, while flaring for an autorotative landing.
Event Information
| Type of Event | Accident |
| Event Date | 5/1/1997 |
| Event Day of the Week | Thursday |
| Time of Event | 1700 |
| Event Time Zone | Eastern Daylight Time |
| Event City | LAKE WALES |
| Event State | FLORIDA |
| Event Country | -- |
| Zipcode of the event site | 33853 |
| Event Date Year | 1997 |
| Event Date Month | 5 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | LAKE WALES MUNICIPAL |
| Event Location Nearest Airport ID | X07 |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | 126 |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1650 Eastern Daylight Time |
| Direction of event from weather observation facility (degrees) | 325 |
| Weather Observation Facility ID | LAL |
| Elevation of weather observation facility | 142 |
| Distance of event from weather observation facility (units?) | 25 |
| Time Zone of the weather observation | EDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Unknown |
| Sky Condition for Lowest Ceiling | Unknown |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 20 |
| Air Temperature at event time (in degrees celsius) | 29 |
| Dew Point at event time (in degress fahrenheit) | 15 |
| Wind Direction (degrees magnetic) | 310 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 11 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 29 |
| Density Altitude (feet) | 1500 |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 2 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 758 |
| NTSB Notification Source | -- |
| NTSB Notification Date | May 1 1996 12:00AM |
| NTSB Notification Time | 1830 |
| Fiche Number and/or location -used to find docket information | IMAGE |
| Date of most recent change to record | Dec 8 2000 12:16PM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N37754 |
| NTSB Number | ATL97LA067 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Hughes |
| Aircraft Model | 269A |
| Aircraft Series Identifier | 269A |
| Aircraft Serial Number | 67-1664 |
| Certified Max Gross Weight | 1550 |
| 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 21 1997 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 1567 |
| ELT Installed | Unknown |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | SUN-AIR HELICOPTERS |
| Aircraft Owner Street Address | 446 S. AIRPORT ROAD |
| Aircraft Owner City | LAKE WALES |
| Aircraft Owner State | FL |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 33853 |
| Operator is an individual? | -- |
| Operator Name | |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | |
| Operator City | |
| Operator State | |
| Operator Country | |
| Operator Zip code | |
| 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) | Instructional |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | Yes |
| Departure Airport Code | X07 |
| Departure City | |
| Departure State | |
| Departure Country | |
| Departure Time | 1650 |
| Departure Time Zone | EST |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | |
| Destination City | |
| Destination State | |
| Destination Country | |
| Specific Phase of Flight | Emergency landing |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:30AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 6 |
| Runway Length | 3999 |
| Runway Width | 100 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |