# NTSB FTW80FA020: Piper PA-32, N4097R, Harrah, OK, December 5, 1979

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: December 5, 1979
- Place: Harrah, OK · HARRAH, OK
- Location: 35.4720° N, 97.1827° W: Placed by OpenAirDocs: center of Harrah, OK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=35.4720&lon=-97.1827&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 2 serious
- Status: Completed, report March 5, 1980
- Report: Brief approved by the director
- ADs cited in the narratives: [AD 78-09-07 R3](https://openairdocs.org/ad/78-09-07-R3) (OpenAirDocs)
- NTSB case key (mKey): 133292
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW80FA020
- Page: https://openairdocs.org/ntsb/FTW80FA020

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3539   79/12/5 NR.HARRAH,OK          PIPER PA-32         CR-  0  1  0  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 1720                    N4097R              PX-  0  1  0  AIR TAXI-PASSG            AGE 32, 5658 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            2000 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          OKLAHOMA CITY,OK            TAHLEQUAH,OK
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: CLIMB TO CRUISE
           COLLIDED WITH: TREES                                     LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           POWERPLANT - IGNITION SYSTEM: MAGNETOS
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           POWERPLANT - ENGINE STRUCTURE: OTHER
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        FACTOR(S)
           TERRAIN - HIGH OBSTRUCTIONS
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- L MAG COUPLING PIN FAILED,PAWL CONTACTED MAG CASE,GEARS IN MAG DRIVE TRAIN FAILED.AD 78-09-07 NCW.
```

## Aircraft

- Registration: [N4097R](https://openairdocs.org/deregistered/N4097R-2011-02-17), registration cancelled 2011-02-17, S/N 32-40422, built 1967 (OpenAirDocs)
- Reported make and model: PIPER PA-32
- Registry model: [Piper PA-32-300](https://openairdocs.org/model/piper-pa-32-300) (registry code 7103212) (OpenAirDocs)
- Registry engine: [Lycoming TI0-540 series](https://openairdocs.org/engine/lycoming-ti0-540-series) (registry code 41533, turbo-prop) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed

## 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 19791205041159A](https://openairdocs.org/incident/19791205041159A), Dec 5, 1979: Piper PA32300, Harrah, OK, Destroyed. Magneto impulse coupling dow pin stripped engine accessory gears. Pilot undershot large open are on forced landing.

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.