# NTSB ANC72FAG32: Piper PA-16, N5721H, Anchorage, AK, August 19, 1971

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 19, 1971
- Place: Anchorage, AK · ANCHORAGE, AK
- Location: 61.2181° N, 149.9003° W: Placed by OpenAirDocs: center of Anchorage, AK, within about 23 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=61.2181&lon=-149.9003&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report April 5, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 163108
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC72FAG32
- Page: https://openairdocs.org/ntsb/ANC72FAG32

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3150  71/8/19    ANCHORAGE,ALAS      PIPER PA-16         CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 33, 130
        TIME - 0456                    N5721H              PX-  0  0  2  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 100 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          ANCHORAGE,ALAS              HOMER,ALAS
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           NOSE OVER/DOWN                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           TERRAIN - WET,SOFT GROUND
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  SMOKE IN COCKPIT
                                  PROP/ENGINE VIBRATION
        REMARKS- NR 3 CYL EXH VALVE HEAD SEPARATED FROM VALVE STEM.
```

## Aircraft

- Registration: [N5721H](https://openairdocs.org/deregistered/N5721H-2000-12-01), registration cancelled 2000-12-01, S/N 16-332 (OpenAirDocs)
- Reported make and model: PIPER PA-16
- Registry model: [Piper PA-16](https://openairdocs.org/model/piper-pa-16) (registry code 7101602) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N5721H (1)

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.

- [NTSB ANC78DAG49](https://openairdocs.org/ntsb/ANC78DAG49), Apr 23, 1978: Piper PA-16 (N5721H), Anchorage, AK, substantial 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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