Individually Owned: 150,657
Corporate Owned: 137,281
Lake Tahoe Airport
Aircraft Accident/Incident Report
Lake Tahoe, California 95731
Monday, August 14, 1989 11:12 PDT
NTSB Narrative Summary Released at Completion of Accident
APPROACHING THE ARPT, THE PLT RECEIVED LDG INSTRUCTIONS. SECONDS LATER, HIS TRANSMISSIONS WERE ABRUPTLY TERMINATED. WITNESSES OBSERVED THE ACFT ABRUPTLY NOSE OVER & DESCEND INTO WATER AT A HIGH RATE OF SPEED. IT FRAGMENTED UPON IMPACT & IMMEDIATELY SANK. THE ACFT HAD RECENTLY UNDERGONE MAINTENANCE INVOLVING THE REMOVAL & INSTALLATION OF ITS WINGS, & INSTALLATION OF AN AUTOPILOT & ELECTRIC TRIM. FOLLOWING THIS WORK, THE ACFT WAS FLIGHT TESTED. DURING THE TEST, THE PLT EXPERIENCED A LOSS OF CONTROL & THE ACFT PITCHED DOWN IN A MANNER SIMILAR TO THAT DESCRIBED BY WITNESSES TO THE ACCIDENT. EXAM OF THE UPPER STABILATOR PULLEY ASSEMBLY REVEALED THAT ITS RESPECTIVE CONTROL CABLE HAD BEEN WORKING AGAINST THE SIDE OF THE PULLEY. THE PULLEY WAS FRACTURED, & THE CABLE HAD BECOME WEDGED IN THE PULLEY, WHICH (IN TURN) HAD BECOME WEDGED AGAINST THE SIDE OF ITS SUPPORT BRACKET. THIS ACTION RESTRICTED STABILATOR MOVEMENT.
NTSB Probable Cause Narrative
DISABLEMENT OF THE STABILATOR FLIGHT CONTROL SYSTEM. A CONTRIBUTING FACTOR WAS: INADEQUATE MAINTENANCE.
Event Information
| Type of Event | Accident |
| Event Date | 8/14/1989 |
| Event Day of the Week | Monday |
| Time of Event | 1112 |
| Event Time Zone | Pacific Daylight Time |
| Event City | LAKE TAHOE |
| Event State | CALIFORNIA |
| Event Country | -- |
| Zipcode of the event site | 95731 |
| Event Date Year | 1989 |
| Event Date Month | 8 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | LAKE TAHOE |
| Event Location Nearest Airport ID | TVL |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | 0 |
| Degrees magnetic from airport | 0 |
| Airport Elevation | 6264 |
| Weather Briefing Completeness | Not pertinent |
| Investigator's weather source | Witness |
| Time of the weather observation | 1110 Pacific Daylight Time |
| Direction of event from weather observation facility (degrees) | 154 |
| Weather Observation Facility ID | TVL |
| Elevation of weather observation facility | 6264 |
| Distance of event from weather observation facility (units?) | 21 |
| Time Zone of the weather observation | PDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 50 |
| Air Temperature at event time (in degrees celsius) | 22 |
| Dew Point at event time (in degress fahrenheit) | 4 |
| Wind Direction (degrees magnetic) | 350 |
| 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) | 30 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | Fatal |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | 2 |
| Injury Total Minor | -- |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 2 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 2377 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Aug 14 1989 12:00AM |
| NTSB Notification Time | 1220 |
| Fiche Number and/or location -used to find docket information | 43016 |
| Date of most recent change to record | Dec 13 2000 12:58PM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N4838P |
| NTSB Number | LAX89FA277 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | -- |
| Damage | Destroyed |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | PIPER |
| Aircraft Model | PA-23-250 |
| Aircraft Series Identifier | PA-23-250 |
| Aircraft Serial Number | 27-408 |
| Certified Max Gross Weight | 4800 |
| Aircraft Category | Airplane |
| 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 | 5 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | Mar 2 1989 12:00AM |
| Airframe hours since last inspection | 25 |
| Airframe Hours | 2554 |
| ELT Installed | Yes |
| ELT Activated | Yes |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | JOHN W. BUCHANAN, INC. |
| Aircraft Owner Street Address | 20928 LAMBERTON AVE. |
| Aircraft Owner City | LONG BEACH |
| Aircraft Owner State | CA |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 90810 |
| 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) | Personal |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | S21 |
| Departure City | SUNRIVER |
| Departure State | OR |
| Departure Country | |
| Departure Time | 915 |
| Departure Time Zone | PDT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | TVL |
| Destination City | LAKE TAHOE |
| Destination State | CA |
| Destination Country | |
| Specific Phase of Flight | Approach |
| 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 | -- |