# NTSB ANC78DA073: Grumman G-21A, N72PR, Old Harbor, AK, September 2, 1978

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 2, 1978
- Place: Old Harbor, AK · OLD HARBOR, AK
- Location: 57.2186° N, 153.3278° W: Placed by OpenAirDocs: center of Old Harbor, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=57.2186&lon=-153.3278&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 5 uninjured
- Status: Completed, report July 26, 1979
- Report: Brief approved by the director
- NTSB case key (mKey): 140461
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC78DA073
- Page: https://openairdocs.org/ntsb/ANC78DA073

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
1-0024   78/9/2    OLD HARBOR,AK       GRUMMAN G-21A       CR-  0  0  1  SCHED DOM PASSG SRV       COMMERCIAL, AGE 36, 4321
        TIME - 1040                    N72PR               PX-  0  0  4                            TOTAL HOURS, 1040 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, INSTRUMENT RATED.
        NAME OF AIRPORT - OLD HARBOR
        OPERATOR - KODIAK WESTERN ALASKA AIRLINES,INC.
        DEPARTURE POINT             INTENDED DESTINATION
          OLD HARBOR,AK               KODIAK,AK
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: RUN
           GROUND-WATER LOOP-SWERVE                                 TAKEOFF: ABORTED
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: CYLINDER ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - INTENTIONAL GROUND-WATER-LOOP-SWERVE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        REMARKS- #2 CYL HEAD CRACKED.
```

## Aircraft

- Registration: N72PR (not matched to a registry record)
- Reported make and model: GRUMMAN G-21A
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Old Harbor

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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