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NTSB Report
June 6, 1993 · Piper PA-23-150 · N522T
Diablo, CA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
June 6, 1993
Injury Outcomes
2 injuries (2 fatalities)
Location
Diablo, CA
Aircraft
Piper PA-23-150
Tail Number
N522T
Operator
Norman E Lamantia
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
LAX93FA242
THE AIRPLANE COLLIDED WITH MOUNTAINOUS TERRAIN IN A NEAR WINGS LEVEL ATTITUDE DURING INSTRUMENT METEOROLOGICAL CONDITIONS. WITNESSES REPORTED NORMAL ENGINE SOUNDS WHEN THE AIRPLANE FLEW OVER THEIR LOCATION. THERE WAS NO RECORD OF THE PILOT OBTAINING A WEATHER BRIEFING PRIOR TO HIS DEPARTURE. THERE WERE NO MECHANICAL FAILURES OR MALFUNCTIONS FOUND DURING AN EXAM OF THE AIRCRAFT WRECKAGE. BOTH PROPELLER'S SHOWED CHORDWISE SCRATCHES AND 'S' BENDING.
NTSB Probable Cause
THE PILOT IN COMMAND'S CONTINUED FLIGHT INTO INSTRUMENT METEOROLOGICAL CONDITIONS, AND THE IMPROPER IN FLIGHT PLANNING AND DECISION MAKING BY THE PILOT.
Full Narrative
THE AIRPLANE COLLIDED WITH MOUNTAINOUS TERRAIN IN A NEAR WINGS LEVEL ATTITUDE DURING INSTRUMENT METEOROLOGICAL CONDITIONS. WITNESSES REPORTED NORMAL ENGINE SOUNDS WHEN THE AIRPLANE FLEW OVER THEIR LOCATION. THERE WAS NO RECORD OF THE PILOT OBTAINING A WEATHER BRIEFING PRIOR TO HIS DEPARTURE. THERE WERE NO MECHANICAL FAILURES OR MALFUNCTIONS FOUND DURING AN EXAM OF THE AIRCRAFT WRECKAGE. BOTH PROPELLER'S SHOWED CHORDWISE SCRATCHES AND 'S' BENDING.
Flight
Event TypeAccident
Event Time11:50 PDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireGrd
Aircraft ExplosionNo
Aircraft
AircraftPiper PA-23-150
Tail NumberN522T
Aircraft CategoryAir
DamageDestroyed
OperatorNorman E Lamantia
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsLycoming · O-320 · Reciprocating · 150
People & Injuries
Injury Summary2 injuries (2 fatalities)
Fatal2
Serious0
Minor0
Uninjured0
Total2
Crew 1Age 59 · Second Class
Conditions
ConditionsIMC
LightDaylight
WindCalm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourceWIT