# NTSB LAX62A0073: Grumman G-21A, N324, Avalon Bay, CA, July 17, 1962

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 17, 1962
- Place: Avalon Bay, CA · AVALON BAY, CA
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 7 uninjured
- Status: Completed, report April 6, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 148455
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX62A0073
- Page: https://openairdocs.org/ntsb/LAX62A0073

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
1-0049  62/7/17    AVALON BAY,CALIF    GRUMMAN G-21A       CR-  0  0  1  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 0930                    N324                PX-  0  0  6                            40, 9800 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            2600 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - AVALON BAY SPB
        OPERATOR - AVALON AIR TRANSPORT,INC.
        DEPARTURE POINT             INTENDED DESTINATION
          AVALON BAY,CALIF            LONG BEACH,CALIF
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: PROPELLER                       TAKEOFF: RUN
        PROBABLE CAUSE(S)
           POWERPLANT - PROPELLER AND ACCESSORIES: BLADE RETENTION MECHANISM
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
           MISCELLANEOUS ACTS,CONDITIONS - VIBRATION,EXCESSIVE
        FACTOR(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
        REMARKS- NR 3 PROP BLADE FAILED IN FATIGUE DUE VIBRATION CAUSED BY ROTATION OF BLADE WITHIN RETENTION CLAMP
```

## Aircraft

- Registration: [N324](https://openairdocs.org/deregistered/N324-2012-10-02), registration cancelled 2012-10-02, S/N B66, built 1956 (OpenAirDocs)
- Reported make and model: GRUMMAN G-21A
- Registry model: [Grumman G-21A](https://openairdocs.org/model/grumman-g-21a) (registry code 3951204) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Avalon Bay Spb

## Other investigations on N324 (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 LAX76IL006](https://openairdocs.org/ntsb/LAX76IL006), Jul 30, 1975: Grumman G-21 (N324), Long Beach, CA, 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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