# NTSB IAD71II056: Nihon YS-11A, N224P, Washington, DC, June 3, 1971

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Closed
- Date: June 3, 1971
- Place: Washington, DC · WASHINGTON, DC
- Location: 38.8951° N, 77.0364° W: Placed by OpenAirDocs: center of Washington, DC, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.8951&lon=-77.0364&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 45 uninjured
- Status: Completed, report July 28, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 162242
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=IAD71II056
- Page: https://openairdocs.org/ntsb/IAD71II056

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
4-0036   71/6/3  NR.WASHINGTON,DC      NIHON YS-11A        CR-  0  0  4  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 1816                    N224P               PX-  0  0 41                            37, 11503 TOTAL HOURS,
                                       DAMAGE-MINOR        OT-  0  0  0                            1122 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        CLASSIFIED AS INCIDENT
        OPERATOR - PIEDMONT AVIATION,INC.
        DEPARTURE POINT             INTENDED DESTINATION
         WASHINGTON,DC                WINSTON-SALEM,NC
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           FIRE OR EXPLOSION: IN FLIGHT                             IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           POWERPLANT - COMPRESSOR ASSEMBLY: IMPELLER
           MISCELLANEOUS ACTS,CONDITIONS - CHAFED
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
        REMARKS- BOLT FROM INLET GUIDE VANE,NR 1 ENG,LOOSE.CAUSED MILLING THRU BACKING PLATE.IMPELLER FAILED.
```

## Aircraft

- Registration: N224P (not matched to a registry record)
- Reported make and model: NIHON YS-11A
- Category: Airplane
- Engines: turbo prop
- Damage: Minor damage

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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