Individually Owned: 150,657
Corporate Owned: 137,281
El Tiro Glider Port Airport
Aircraft Accident/Incident Report
Marana, Arizona 85238
Saturday, January 31, 1987 12:00 MST
NTSB Narrative Summary Released at Completion of Accident
DURING A WINCH TOW, THE CABLE PREMATURELY RELEASED THE GLIDER AT APPROXIMATELY 100 TO 150 FEET. THE GLIDER REMAINED IN A NOSE HIGH ATTITUDE MOMENTARILY THEN BEGAN A SHALLOW DESCENDING RIGHT TURN. AT APPROXIMATELY 75 FEET THE ROLL, PITCH, AND DESCENT RATE ACCELERATED. THE GLIDER COMPLETED APPROXIMATELY 140 DEGREES OF TURN THEN COLLIDED WITH THE TERRAIN IN A STEEP NOSE DOWN ATTITUDE. SERVICE BULLETIN NO. SA-001 AND AIRWORTHINESS DIRECTIVE 87-02-01 WERE ADOPTED TO PREVENT THE POSSIBILITY OF AN INADVERTENT TOW-HOOK RELEASE DURING TOWING OPERATIONS. THE AD HAD NOT BEEN COMPLIED WITH AT THE TIME OF THE ACCIDENT.
NTSB Probable Cause Narrative
Not Yet Reported
Event Information
| Type of Event | Accident |
| Event Date | 1/31/1987 |
| Event Day of the Week | Saturday |
| Time of Event | 1200 |
| Event Time Zone | Mountain Standard Time |
| Event City | MARANA |
| Event State | ARIZONA |
| Event Country | -- |
| Zipcode of the event site | 85238 |
| Event Date Year | 1987 |
| Event Date Month | 1 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | EL TIRO GLIDER PORT |
| Event Location Nearest Airport ID | |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | 1 |
| Degrees magnetic from airport | 90 |
| Airport Elevation | 2100 |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1053 Mountain Standard Time |
| Direction of event from weather observation facility (degrees) | 110 |
| Weather Observation Facility ID | TUS |
| Elevation of weather observation facility | 2630 |
| Distance of event from weather observation facility (units?) | 30 |
| Time Zone of the weather observation | MST |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 3000 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | Overcast |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 15 |
| Air Temperature at event time (in degrees celsius) | 9 |
| Dew Point at event time (in degress fahrenheit) | 6 |
| Wind Direction (degrees magnetic) | 310 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 8 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 29 |
| Density Altitude (feet) | 1900 |
| Intensity of Precipitation | Light |
| METAR weather report | -- |
| Event Highest Injury | Serious |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | -- |
| Injury Total Serious | 1 |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 51 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Feb 1 1987 12:00AM |
| NTSB Notification Time | 2026 |
| Fiche Number and/or location -used to find docket information | 32489 |
| Date of most recent change to record | Dec 13 2000 1:37PM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N5727S |
| NTSB Number | LAX87LA104 |
| 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 | SCHWEIZER |
| Aircraft Model | SGS 2-33 |
| Aircraft Series Identifier | SGS 2-33 |
| Aircraft Serial Number | 71 |
| Certified Max Gross Weight | 1040 |
| Aircraft Category | Glider |
| 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 | 0 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | Feb 15 1986 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 6901 |
| ELT Installed | No |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | TUCSON SOARING CLUB |
| Aircraft Owner Street Address | P.O. BOX 40155 |
| Aircraft Owner City | TUSCON |
| Aircraft Owner State | AZ |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 85717 |
| 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 | No |
| Departure Point Same as Event | No |
| Departure Airport Code | |
| Departure City | MARANA |
| Departure State | AZ |
| Departure Country | |
| Departure Time | 0 |
| Departure Time Zone | |
| 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 | 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 | 26 |
| Runway Length | 5000 |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |