# NTSB NYC75AN070: Boeing 727, N274US, Thiells, NY, December 1, 1974

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: December 1, 1974
- Place: Thiells, NY · THIELLS, NY
- Location: 41.2055° N, 74.0136° W: Placed by OpenAirDocs: center of Thiells, NY, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.2055&lon=-74.0136&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 3 fatal
- Status: Completed, report October 17, 1975
- Safety recommendations: Yes
- NTSB case key (mKey): 79499
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC75AN070
- Board report AAR7513 (PDF): https://www.ntsb.gov/investigations/AccidentReports/Reports/AAR7513.pdf
- Page: https://openairdocs.org/ntsb/NYC75AN070

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
1-0031   74/12/1 NR.THIELLS,NY         BOEING 727          CR-  3  0  0  FERRY                     AIRLINE TRANSPORT, AGE
        TIME - 1926                    N274US              PX-  0  0  0                            35, 7434 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            1973 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        OPERATOR - NORTHWEST AIRLINES,INC.
        DEPARTURE POINT             INTENDED DESTINATION
          NEW YORK,NY                 BUFFALO,NY
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           STALL: SPIRAL                                            IN FLIGHT: CLIMB TO CRUISE
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO OBTAIN/MAINTAIN FLYING SPEED
           PILOT IN COMMAND - FAILED TO FOLLOW APPROVED PROCEDURES,DIRECTIVES,ETC.
           SYSTEMS - OTHER SYSTEMS: PITOT SYSTEM
           WEATHER - ICING CONDITIONS-INCLUDES SLEET,FREEZING RAIN,ETC.
           PILOT IN COMMAND - EXCEEDED DESIGNED STRESS LIMITS OF AIRCRAFT
        FACTOR(S)
           AIRFRAME - FLIGHT CONTROL SURFACES: HORIZONTAL STABILIZER, ATTACHMENTS
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        WEATHER BRIEFING - COMPANY DISPATCH
        WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          BROKEN                                                    2500
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     SLEET
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      34
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
           70                                                       14
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          IFR                                                      IFR
        REMARKS- PITOT HEAT SWITCH NOT ON. FAILED TO RECOGNIZE PITOT ICG.LOST CTL.L HRZNTL STAB FAILED.
```

## Aircraft

- Registration: [N274US](https://openairdocs.org/deregistered/N274US-1975-01-02), registration cancelled 1975-01-02, S/N 20296, built 1969 (OpenAirDocs)
- Reported make and model: BOEING 727
- Registry model: [Boeing 727-251](https://openairdocs.org/model/boeing-727-251) (registry code 138408H) (OpenAirDocs)
- Category: Airplane
- Engines: turbo fan
- Damage: Destroyed

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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