Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Shaver Lake, California 93664
Saturday, May 28, 1988 19:10 PDT
NTSB Narrative Summary Released at Completion of Accident
THE PLT BOUGHT THE ACFT ABOUT 1 MONTH PRIOR TO THE ACCIDENT. HE HAD LIMITED EXP IN THE ACFT, AND LIMITED EXP WITH HIGH ALT FLT AND ITS WX PHENOMONA. THE PLT OBTAINED TWO WX BREIFINGS FOR THE FLT. DURING BOTH, HE WAS ADVISED OF THE FORECAST AND PLT REPORTED CONDITIONS OF MODERATE TO SEVERE MIXED ICING AND TURBULENCE ASSOCIATED WITH A MTN WAVE ON THE EASTERN SIDE OF THE SIERRA NEVADA MTNS. INSTEAD OF FLYING ALONG HIS INTENDED ROUTE ON THE WESTERN SIDE OF THE MTNS, HE CHOSE A DIRECT ROUTE, WHICH PLACED THE ACFT ON THE EASTERN SIDE OF THE MTNS. THE TRACK OF THE ACFT WAS ESTABLISHED BY RECORDED RADAR DATA. THE DATA SHOWED THE ACFT IN CRUISE AT 16,500 FT UNTIL ABOUT 1 MIN PRIOR TO THE ACCIDENT. THE ACFT WAS SHOWN TO CLIMB TO 17,200 FEET BEFORE IT DISAPPEARED. THE LAST RADAR TARGET WAS OBSERVED ABOUT 2 MILES FROM THE IMPACT LOCATION. THE ACFT IMPACTED IN A STEEP NOSE DOWN DESCENT.
NTSB Probable Cause Narrative
INFLIGHT ENCOUNTER WITH FORCASTED SEVERE ICING AND TURBULENCE BEYOND THE CAPABILITY OF EITHER THE AIRCRAFT OR THE PILOT , WHICH LED TO AN INFLGIHT LOSS OF CONTROL. FACTORS IN THE ACCIDENT WERE THE PILOTS LACK OF UNDERSTANDING OF HIGH ALTITUDE FLIGHT ASPECTS AND METEROLOGICAL PHENOMENA.
Event Information
| Type of Event | Accident |
| Event Date | 5/28/1988 |
| Event Day of the Week | Saturday |
| Time of Event | 1910 |
| Event Time Zone | Pacific Daylight Time |
| Event City | SHAVER LAKE |
| Event State | CALIFORNIA |
| Event Country | -- |
| Zipcode of the event site | 93664 |
| Event Date Year | 1988 |
| Event Date Month | 5 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | |
| 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 | 0 |
| Degrees magnetic from airport | 0 |
| Airport Elevation | 0 |
| Weather Briefing Completeness | Partial - limited by pilot |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1750 Pacific Daylight Time |
| Direction of event from weather observation facility (degrees) | 43 |
| Weather Observation Facility ID | MMH |
| Elevation of weather observation facility | 7128 |
| Distance of event from weather observation facility (units?) | 15 |
| Time Zone of the weather observation | PDT |
| Lighting Conditions | Dusk |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 1500 |
| Sky/Lowest/Cloud Conditions | Scattered |
| 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) | 16 |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | 200 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 35 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Unknown |
| Wind Gust (knots) | 45 |
| Altimeter Setting at event time (in. Hg) | 29 |
| Density Altitude (feet) | 8800 |
| 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 | 4 |
| Injury Total Minor | -- |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 4 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 2378 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Jun 6 1988 12:00AM |
| NTSB Notification Time | 1430 |
| Fiche Number and/or location -used to find docket information | 39092 |
| Date of most recent change to record | Dec 13 2000 11:45AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N98683 |
| NTSB Number | LAX88FA215 |
| 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 | Ground |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | CESSNA |
| Aircraft Model | 421C |
| Aircraft Series Identifier | 421C |
| Aircraft Serial Number | 421C0209 |
| Certified Max Gross Weight | 7450 |
| 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 | 7 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | Sep 21 1987 12:00AM |
| Airframe hours since last inspection | 35 |
| Airframe Hours | 2575 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | BROOKS PRODUCTS, INC. |
| Aircraft Owner Street Address | P.O. BX 4488 |
| Aircraft Owner City | EL MONTE |
| Aircraft Owner State | CA |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 91734 |
| Operator is an individual? | -- |
| Operator Name | JOHN D. MAC DONALD |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | 5445 SAPPHIRE STREET |
| Operator City | ALTA LOMA |
| Operator State | CA |
| Operator Country | |
| Operator Zip code | 91701 |
| 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 | Yes |
| Departure Point Same as Event | No |
| Departure Airport Code | L67 |
| Departure City | RIALTO |
| Departure State | CA |
| Departure Country | |
| Departure Time | 1800 |
| Departure Time Zone | PDT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | TRK |
| Destination City | TRUCKEE |
| Destination State | CA |
| Destination Country | |
| Specific Phase of Flight | Descent |
| 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 | 0 |
| Runway Length | 0 |
| Runway Width | 0 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |