# NTSB LAX75AL031: Cessna 172, N20184, S.Luis Obsp, CA, December 3, 1974 - Type: NTSB accident investigation - Classification: Accident · Fatal · Closed - Date: December 3, 1974 - Place: S.Luis Obsp, CA · S.LUIS OBSP, CA - Location: 35.2662° N, 120.6684° W: Placed by OpenAirDocs: center of San Luis Obispo, CA, within about 6 miles (OpenAirDocs) - Nearby events: https://openairdocs.org/map.md?lat=35.2662&lon=-120.6684&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: Fatal - Injuries: 4 fatal - Status: Completed, report April 2, 1975 - Report: Brief approved by the director - NTSB case key (mKey): 144857 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX75AL031 - Page: https://openairdocs.org/ntsb/LAX75AL031 ## NTSB brief (aircraft 2) ``` ----------------------------------------------------------------------------------------------------------------------------  FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA                                                                F  S M/N     PURPOSE ---------------------------------------------------------------------------------------------------------------------------- 3-4270   74/12/3   S.LUIS OBSP,CALIF   PIPER PA-24         CR-  1  0  0  NONCOMMERCIAL             AIRLINE TRANSPORT, AGE         TIME - 1420                    N9256P              PX-  0  0  0  BUSINESS                  37, 4000 TOTAL HOURS, 2                                        DAMAGE-DESTROYED    OT-  3  0  0                            IN TYPE, INSTRUMENT                                                                                                    RATED.         NAME OF AIRPORT - SAN LUIS OBISPO         DEPARTURE POINT             INTENDED DESTINATION           SALINAS,CALIF               S.LUIS OBSP,CALIF         TYPE OF ACCIDENT                                         PHASE OF OPERATION            COLLISION WITH AIRCRAFT: BOTH IN FLIGHT                  LANDING: INITIAL APPROACH         PROBABLE CAUSE(S)            PILOT IN COMMAND - FAILED TO SEE AND AVOID OTHER AIRCRAFT            PERSONNEL - MISCELLANEOUS-PERSONNEL: PILOT OF OTHER AIRCRAFT         FACTOR(S)            WEATHER - RAIN         WEATHER BRIEFING - BRIEFED BY WEATHER BUREAU PERSONEL, BY PHONE         WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT         SKY CONDITION                                            CEILING AT ACCIDENT SITE           OVERCAST                                                  2500         VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE           5 OR OVER(UNLIMITED)                                     RAIN         OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F           NONE                                                      58         WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS           180                                                       30         TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN           VFR                                                      VFR          SPECIAL DATA           SEGMENTS OF AVIATION INVOLVED - SMALL US GEN.AV.-SMALL US GEN.AV.           CONTROLLING AGENCY - NO CONTROL                          RADAR CTL/SURVEILLANCE - NOT UNDER RADAR CONTACT           TRAFFIC ADVISORY ISSUED - NONE                           CONTROLLED/UNCONTROLLED AIRPORT - UNCONTROLLED AIRPORT           CONTROL ZONE/AREA - YES                                  CONVERGENCE ANGLE-DEGREES -  90           HORIZONTAL COLLISION ANGLE-DEGREES -   90                EVASIVE ACTION TAKEN - NO           ANTI-COLLISION LIGHTS - OPERATING ``` ## NTSB brief (aircraft 1) ``` ----------------------------------------------------------------------------------------------------------------------------  FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA                                                                F  S M/N     PURPOSE ---------------------------------------------------------------------------------------------------------------------------- 3-4270   74/12/3   S.LUIS OBSP,CALIF   CESSNA 172          CR-  1  0  0  NONCOMMERCIAL             PRIVATE, AGE 31, 164         TIME - 1430                    N20184              PX-  2  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 54 IN TYPE,                                        DAMAGE-DESTROYED    OT-  1  0  0                            NOT INSTRUMENT RATED.         NAME OF AIRPORT - SAN LUIS OBISPO         DEPARTURE POINT             INTENDED DESTINATION           SANTA MARIA,CALIF           NAPA,CALIF         TYPE OF ACCIDENT                                         PHASE OF OPERATION            COLLISION WITH AIRCRAFT: BOTH IN FLIGHT                  IN FLIGHT: NORMAL CRUISE         PROBABLE CAUSE(S)            PILOT IN COMMAND - FAILED TO SEE AND AVOID OTHER AIRCRAFT            PERSONNEL - MISCELLANEOUS-PERSONNEL: PILOT OF OTHER AIRCRAFT         FACTOR(S)            WEATHER - RAIN         WEATHER BRIEFING - BRIEFED BY WEATHER BUREAU PERSONEL, BY PHONE         WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT         SKY CONDITION                                            CEILING AT ACCIDENT SITE           OVERCAST                                                  2500         VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE           5 OR OVER(UNLIMITED)                                     RAIN         OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F           NONE                                                      58         WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS           180                                                       30         TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN           VFR                                                      VFR          SPECIAL DATA           SEGMENTS OF AVIATION INVOLVED - SMALL US GEN.AV.-SMALL US GEN.AV.           CONTROLLING AGENCY - NO CONTROL                          RADAR CTL/SURVEILLANCE - NOT UNDER RADAR CONTACT           TRAFFIC ADVISORY ISSUED - NONE                           CONTROLLED/UNCONTROLLED AIRPORT - UNCONTROLLED AIRPORT           CONTROL ZONE/AREA - YES                                  CONVERGENCE ANGLE-DEGREES -  90           HORIZONTAL COLLISION ANGLE-DEGREES -   90                EVASIVE ACTION TAKEN - NO           ANTI-COLLISION LIGHTS - OPERATING ``` ## Aircraft 1 - Registration: [N20184](https://openairdocs.org/deregistered/N20184-1975-05-16), registration cancelled 1975-05-16, S/N 17261077, built 1972 (OpenAirDocs) - Reported make and model: CESSNA 172 - Registry model: [Cessna 172M](https://openairdocs.org/model/cessna-172m) (registry code 2072418) (OpenAirDocs) - Category: Airplane - Engines: reciprocating - Damage: Destroyed - Airport: San Luis Obispo ## Aircraft 2 - Registration: [N9256P](https://openairdocs.org/deregistered/N9256P-1975-05-19), registration cancelled 1975-05-19, S/N 24-4755 (OpenAirDocs) - Reported make and model: PIPER PA-24 - Registry model: [Piper PA-24-260](https://openairdocs.org/model/piper-pa-24-260) (registry code 7102406) (OpenAirDocs) - Category: Airplane - Engines: reciprocating - Damage: Destroyed - Airport: San Luis Obispo ## FAA reports on this event (2) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 19741203044201A](https://openairdocs.org/incident/19741203044201A), Dec 3, 1974: Cessna 172M, S.Luis Obsp, CA, Destroyed, 2 fatal - [Accident 19741203044202A](https://openairdocs.org/incident/19741203044202A), Dec 3, 1974: Piper PA24260, S.Luis Obsp, CA, Destroyed From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.