# NTSB MIA74AM100: Douglas DC-3, N87628, San Juan, PR, June 13, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 13, 1974
- 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: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 28 uninjured
- Status: Completed, report July 24, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 128158
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA74AM100
- Page: https://openairdocs.org/ntsb/MIA74AM100

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1864  74/6/13  NR.SAN JUAN,PR        DOUGLAS DC-3        CR-  0  0  3  COMMERCIAL                ATP,FLIGHT INSTR., AGE
        TIME - 0845                    N87628              PX-  0  0 25  COMMUTER AIR CARRIER      49, 17887 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0  AIR TAXI-PASSG S-I        6024 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - PUERTO RICO INTL
        DEPARTURE POINT             INTENDED DESTINATION
         SAN JUAN,PR                  ST THOMAS,VI
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           FIRE OR EXPLOSION: IN FLIGHT                             IN FLIGHT: CLIMB TO CRUISE
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           POWERPLANT - EXHAUST SYSTEM: MANIFOLDS
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - DISCONNECTED
           MISCELLANEOUS ACTS,CONDITIONS - FIRE IN ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
                                  SMOKE IN COCKPIT
                                  SUSPECTED MECHANICAL DISCREPANCY
        REMARKS- SUPPORT BRACKET ASSEMBLY P/N 2118783 FAILED.EX MANIFOLD P/N 5115224-2 DISENGAGED FM NR 5 CYL.
```

## Aircraft

- Registration: [N87628](https://openairdocs.org/deregistered/N87628-1982-09-25), registration cancelled 1982-09-25, S/N 19747, built 1943 (OpenAirDocs)
- Reported make and model: DOUGLAS DC-3
- Registry model: [Douglas DC3](https://openairdocs.org/model/douglas-dc3) (registry code 3021401) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-1830 series](https://openairdocs.org/engine/pratt-whitney-r-1830-series) (registry code 52020, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Puerto Rico Intl

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19740613019609A](https://openairdocs.org/incident/19740613019609A), Jun 13, 1974: Doug DC3, San Juan, Puerto Rico, Substantial damage. Support bracket assembly p/n 2118783 failed. Ex manifold p/n 5115224-2 disengaged fm nr 5 cyl.

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.