San Francisco Int'l Airport
Aircraft Accident/Incident Report

San Francisco, California 94010
Monday, October 8, 1984 19:49 PDT

NTSB Narrative Summary Released at Completion of Accident

THE ACFT, A GATES LEAR JET 24B, MODIFIED BY A HOWARD/RAISEBACH MARK II CONVERSION, WAS CLEARED FOR TAKEOFF ON RWY 28L. TOWER PSNL ESTIMATED THAT THE ACFT ROTATED FOR TAKEOFF AT 3200' DOWN THE RWY & WAS AT APRX 200' AGL WHEN THE PLT WAS INSTRUCTED TO CONTACT DEPARTURE CONTROL. WITNESSES OBSERVED THE ACFT CLIMBING IN A WINGS LEVEL ATTITUDE WHEN IT ENTERED THE BROKEN CLD LAYER AT ABOUT 600' AGL. MOMENTS LATER, THE ACFT WAS OBSERVED DESCENDING OUT OF THE CLDS AT A STEEP ANGLE& IN A LEFT WING LOW/NOSE DOWN ATTITUDE. THE ACFT IMPACTED BETWEEN RWYS 28L & 28R, APRX 10,000' FROM THE APCH ENDS. WITNESSES REPORTED THAT THE ENGS SOUNDED LIKE THEY WERE OPERATING AT A HI PWR SETTING. AN EXAM OF THE ENGS REVEALED EVIDENCE THAT BOTH WERE AT OR ABOVE 92% PWR AT IMPACT. NO PREIMPACT PART FAILURE/MALFUNCTION WAS FOUND. RECORDS REVEALED2 AUTOPLT DISCREPANCIES ON 10/4/84; ONE INDCD THE ROLL MODE WAS SENSITIVE; THE OTHER INDCD THE AUTOPLT INTERMITTENTLY ROLLED THE ACFT INTO A STANDARD RATE LEFT BANK WHEN ENGAGED. RPRTDLY, THE AUTOPLT WOULD NOT HAVE BEEN USED FOR TAKEOFF.

NTSB Probable Cause Narrative

Not Yet Reported

Event Information

Type of Event Accident
Event Date 10/8/1984
Event Day of the Week Monday
Time of Event 1949
Event Time Zone Pacific Daylight Time
Event City SAN FRANCISCO
Event State CALIFORNIA
Event Country --
Zipcode of the event site 94010
Event Date Year 1984
Event Date Month 10
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude
Event Location Longitude
Event Location Airport SAN FRANCISCO INT'L
Event Location Nearest Airport ID SFO
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 11
Weather Briefing Completeness Not pertinent
Investigator's weather source Weather Observation Facility
Time of the weather observation 1752 Pacific Daylight Time
Direction of event from weather observation facility (degrees) 0
Weather Observation Facility ID SFO
Elevation of weather observation facility 11
Distance of event from weather observation facility (units?) 0
Time Zone of the weather observation PDT
Lighting Conditions Night/Dark
Lowest Ceiling Height 600
Lowest Non-Ceiling Height 600
Sky/Lowest/Cloud Conditions Unknown
Sky Condition for Lowest Ceiling Broken
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 12
Air Temperature at event time (in degrees celsius) 17
Dew Point at event time (in degress fahrenheit) 15
Wind Direction (degrees magnetic) 280
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) 30
Density Altitude (feet) 25
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 3
Injury Total Minor --
Injury Total None --
Injury Total Serious --
Injury Total All 3
Investigating Agency NTSB
NTSB Docket Number (internal use) 3220
NTSB Notification Source --
NTSB Notification Date --
NTSB Notification Time 0
Fiche Number and/or location -used to find docket information 27387
Date of most recent change to record Jan 2 2001 9:15AM
User who most recently changed record dbo
Basic weather conditions Instrument Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N864CL
NTSB Number LAX85MA008
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed IFR
Flight plan Was Activated? --
Damage Destroyed
Aircraft Fire Ground
Aircraft Explosion Ground
Aircraft Manufacturer's Full Name Gates Learjet
Aircraft Model 24B
Aircraft Series Identifier 24B
Aircraft Serial Number 229
Certified Max Gross Weight 15000
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 9
Number of Engines 2
Fixed gear or retractable gear Retractable
Aircraft, Type of Last Inspection AAIP
Date of Last Inspection Sep 30 1954 12:00AM
Airframe hours since last inspection 661
Airframe Hours 25515
ELT Installed No
ELT Activated Yes
ELT Aided Location of Event Site Yes
ELT Type --
Aircraft Owner Name HERSAEL CLAY LACY
Aircraft Owner Street Address 1306 EAST 5TH ST.
Aircraft Owner City MCMINNIVILLE
Aircraft Owner State OR
Aircraft Owner Country
Aircraft Owner Zipcode 97128
Operator is an individual? --
Operator Name CLAY LACY AV INC
Operator Same as Owner? No
Operator Is Doing Business As --
Operator Address Same as Owner? No
Operator Street Address 7435 VALJEAN AVE
Operator City VAN NUYS
Operator State CA
Operator Country
Operator Zip code 91406
Operator Code
Owner has at least one certificate Yes - certificate holder
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) Positioning
Second Pilot on Board Yes
Departure Point Same as Event Yes
Departure Airport Code SFO
Departure City
Departure State
Departure Country
Departure Time 1949
Departure Time Zone PST
Destination Same as Local Flt --
Destination Airport Code VNY
Destination City VAN NUYS
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 28L
Runway Length 10600
Runway Width 200
Sight Seeing flight No
Air Medical Flight No
Medical Flight --