# NTSB DEN67A0004: Cessna 310, N115SU, Longmont, CO, July 10, 1966

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: July 10, 1966
- Place: Longmont, CO · LONGMONT, CO
- Location: 40.1682° N, 105.1005° W: Placed by OpenAirDocs: center of Longmont, CO, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.1682&lon=-105.1005&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report March 4, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 171104
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN67A0004
- Page: https://openairdocs.org/ntsb/DEN67A0004

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0572  66/7/10    LONGMONT COLO       CESSNA 310          CR-  1  0  0  NONCOMMERCIAL             COMMERCIAL, FL.INSTR.,
        TIME - 0500                    N115SU              PX-  1  0  0  PLEASURE/PERSONAL TRANSP  AGE 40, 17500 TOTAL
                                       DAMAGE-DESTROYED    OT-  0  0  0                            HOURS, UNK/NR IN TYPE,
                                                                                                   NOT INSTRUMENT RATED.
        NAME OF AIRPORT - LONGMONT MUNI
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           FIRE OR EXPLOSION: IN FLIGHT                             IN FLIGHT: CLIMB TO CRUISE
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: CLIMB TO CRUISE
        PROBABLE CAUSE(S)
           POWERPLANT - EXHAUST SYSTEM: STACKS
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           MISCELLANEOUS ACTS,CONDITIONS - POOR WELD
           AIRFRAME - WINGS: SPARS
           MISCELLANEOUS ACTS,CONDITIONS - BURNED
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        REMARKS- FUEL FED FIRE CAUSED BY ESCAPING EXAHUST GASES BURNED THROUGH MAIN SPAR OF RIGHT WING.
```

## Aircraft

- Registration: [N115SU](https://openairdocs.org/deregistered/N115SU-1970-09-03), registration cancelled 1970-09-03, S/N 35000 (OpenAirDocs)
- Reported make and model: CESSNA 310
- Registry model: [Cessna 310](https://openairdocs.org/model/cessna-310) (registry code 2074202) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed
- Airport: Longmont Muni

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.

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