# NTSB NYC73AN094: Douglas DC-7CF, N23N, San Juan, PR, December 31, 1972

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: December 31, 1972
- Place: San Juan, PR · SAN JUAN, PR
- Location: 18.4663° N, 66.1057° W: Placed by OpenAirDocs: center of San Juan, PR, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=18.4663&lon=-66.1057&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 5 fatal
- Status: Completed, report March 28, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 169339
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC73AN094
- Page: https://openairdocs.org/ntsb/NYC73AN094

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3757  72/12/31   SAN JUAN,PR         DOUGLAS DC-7CF      CR-  3  0  0  COMMERCIAL                AIRLINE TRANSPORT, AGE
        TIME - 1923                    N23N                PX-  2  0  0  CTR CARGO-I               47, 12400 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            3000 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - SAN JUAN INTL
        DEPARTURE POINT             INTENDED DESTINATION
          SAN JUAN,PR                 MANAGUA,NICARAGUA
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: INITIAL CLIMB
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: MASTER AND CONNECTING RODS
           POWERPLANT - ENGINE STRUCTURE: CYLINDER ASSEMBLY
           POWERPLANT - ENGINE STRUCTURE: PISTON,PISTON RINGS
           MISCELLANEOUS ACTS,CONDITIONS - EXCESSIVE-WEAR/PLAY
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
        FACTOR(S)
           PERSONNEL - OPERATIONAL SUPERVISORY PERSONNEL: DEFICIENCY,COMPANY MAINTAINED EQPMT,SERVICES,REGULATION
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPERLY LOADED AIRCRAFT-WEIGHT-AND/OR C.G.
           MISCELLANEOUS ACTS,CONDITIONS - PREVIOUS DAMAGE
           MISCELLANEOUS ACTS,CONDITIONS - AIRCRAFT CAME TO REST IN WATER
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        REMARKS- NR 2 ENG FAILED,NR 3 LOST PWR.FE UNQUAL.OVER MAX WT 4193 LBS.PREV ENG DMG DUE TAXI ACCDT 12/2/72.
```

## Aircraft

- Registration: [N23N](https://openairdocs.org/deregistered/N23N-2009-07-13), registration cancelled 2009-07-13, S/N 45130, built 1957 (OpenAirDocs)
- Reported make and model: DOUGLAS DC-7CF
- Registry model: [Douglas DC-7C](https://openairdocs.org/model/douglas-dc-7c) (registry code 3021806) (OpenAirDocs)
- Registry engine: [Wright TC18EA series](https://openairdocs.org/engine/wright-tc18ea-series) (registry code 67038, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed
- Airport: San Juan Intl

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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