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NTSB Report
September 21, 1991 · Piper PA-28-181 · N8272Y
Cupertino, CA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
September 21, 1991
Injury Outcomes
2 injuries (2 fatalities)
Location
Cupertino, CA
Aircraft
Piper PA-28-181
Tail Number
N8272Y
Operator
Golden Gate Aviation
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
LAX91FA399
THE 229-HOUR INSTRUMENT RATED PRIVATE PILOT DEPARTED BAKERSFIELD FOR A FLIGHT HOME DURING BRIGHT NIGHTIME VFR CONDITIONS. APPROACHING HIS DESTINATION AIRPORT, SAN CARLOS, THE PILOT CONTACTED NAS MOFFETT AND RECEIVED PERMISSION TO TRANSIT ITS AIRSPACE. THE PILOT WAS TOLD TO REPORT OVER THE AIRPORT. AS THE PILOT APPROACHED THE AIRPORT HE LIKELY ENCOUNTERED A FORECAST OVERCAST LAYER OF CLOUDS HAVING BASES AT 1,000 FEET. THE PILOT MADE A 60 TO 70 DEGREE CHANGE OF COURSE AWAY FROM NAS MOFFETT AND PROBABLY ATTEMPTED TO FLY BENEATH THE CLOUDS WHILE OVER THE DENSELY POPULATED AND ILLUMINATED AREAS OF THE CITY. THE PILOT ENTERED THE BASE OF THE CLOUDS, CONTINUED FLYING UNTIL ENTERING A MOUNTAINOUS AREA AND LOST VISUAL REFERENCE TO THE CITY. SECONDS BEFORE IMPACT THE PILOT REQUESTED THE FREQUENCY FOR A NEARBY RADAR FACILITY. THE PILOT WAS FAMILIAR WITH THE AREA HAVING RECENTLY LEARNED TO FLY IN THE VICINITY.
NTSB Probable Cause
THE PILOT'S FAILURE TO MAINTAIN THE PROPER ALTITUDE, HIS IMPROPER INFLIGHT DECISION TO ATTEMPT FLIGHT BELOW THE BASE OF AN OVERCAST LAYER OF CLOUDS TOWARD RISING MOUNTAINOUS TERRAIN AND THE FLIGHT'S INADVERTENT ENTRY INTO INSTRUMENT METEOROLOGICAL CONDITIONS. FACTORS WHICH CONTRIBUTED TO THE ACCIDENT WERE THE PILOT'S MISJUDGED WEATHER EVALUATION AND HIS IMPROPER VFR PROCEDURES.
Full Narrative
THE 229-HOUR INSTRUMENT RATED PRIVATE PILOT DEPARTED BAKERSFIELD FOR A FLIGHT HOME DURING BRIGHT NIGHTIME VFR CONDITIONS. APPROACHING HIS DESTINATION AIRPORT, SAN CARLOS, THE PILOT CONTACTED NAS MOFFETT AND RECEIVED PERMISSION TO TRANSIT ITS AIRSPACE. THE PILOT WAS TOLD TO REPORT OVER THE AIRPORT. AS THE PILOT APPROACHED THE AIRPORT HE LIKELY ENCOUNTERED A FORECAST OVERCAST LAYER OF CLOUDS HAVING BASES AT 1,000 FEET. THE PILOT MADE A 60 TO 70 DEGREE CHANGE OF COURSE AWAY FROM NAS MOFFETT AND PROBABLY ATTEMPTED TO FLY BENEATH THE CLOUDS WHILE OVER THE DENSELY POPULATED AND ILLUMINATED AREAS OF THE CITY. THE PILOT ENTERED THE BASE OF THE CLOUDS, CONTINUED FLYING UNTIL ENTERING A MOUNTAINOUS AREA AND LOST VISUAL REFERENCE TO THE CITY. SECONDS BEFORE IMPACT THE PILOT REQUESTED THE FREQUENCY FOR A NEARBY RADAR FACILITY. THE PILOT WAS FAMILIAR WITH THE AREA HAVING RECENTLY LEARNED TO FLY IN THE VICINITY.
Flight
Event TypeAccident
Event Time23:34 PDT
Nearest Airport0nm N
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper PA-28-181
Tail NumberN8272Y
Aircraft CategoryAir
DamageDestroyed
OperatorGolden Gate Aviation
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-360-A4M · Reciprocating · 180
Seats4
People & Injuries
Injury Summary2 injuries (2 fatalities)
Fatal2
Serious0
Minor0
Uninjured0
Total2
Crew 1Age 32 · Third Class
Conditions
ConditionsIMC
LightDark Night
Wind30° @ 2 kt
Visibility7 sm
CeilingOvercast 1000 ft
Temperature / Dew Point61 F / 54
Altimeter29.00 inHg
Observation Time06:55
Weather SourceWFAC