# NTSB UNK64X0682: Boeing B-720B, N726US, Miam, FL, February 24, 1964

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: February 24, 1964
- Place: Miam, FL · MIAM, FL
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 40 uninjured
- Status: Completed, report December 21, 1964
- Report: Brief approved by the director
- NTSB case key (mKey): 114844
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK64X0682
- Page: https://openairdocs.org/ntsb/UNK64X0682

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
1-0020  64/2/24    MIAMI FLA           BOEING B-720B       CR-  0  0  7  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 1600                    N726US              PX-  0  0 33                            UNK/NR, UNK/NR TOTAL
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            HOURS, UNK/NR IN TYPE,
                                                                                                   NOT INSTRUMENT RATED.
        NAME OF AIRPORT - MIAMI INT
        OPERATOR - NORTHWEST AIRLINES,INC.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: INITIAL CLIMB
        PROBABLE CAUSE(S)
           POWERPLANT - TURBINE ASSEMBLY: SUPPORT,GUIDE VANE
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPER MAINTENANCE (MAINTENANCE PERSONNEL)
           PERSONNEL - PRODUCTION-DESIGN-PERSONNEL: SUBSTANDARD QUALITY CONTROL
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        REMARKS- FAILURE OF THIRD STAGE TURBINE DISC.
```

## Aircraft

- Registration: [N726US](https://openairdocs.org/deregistered/N726US-1972-03-08), registration cancelled 1972-03-08, S/N 18356 (OpenAirDocs)
- Reported make and model: BOEING B-720B
- Registry model: [Boeing 720-051B](https://openairdocs.org/model/boeing-720-051b) (registry code 1383861) (OpenAirDocs)
- Category: Airplane
- Engines: turbo jet
- Damage: Substantial damage
- Airport: Miami Int

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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