# NTSB ANC66A0036: Grumman G-21A, Reef Island, AK, March 10, 1966

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: March 10, 1966
- Place: Reef Island, AK · REEF ISLAND, AK
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 6 fatal, 1 minor
- Status: Completed, report October 10, 1966
- Report: Brief approved by the director
- NTSB case key (mKey): 172913
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC66A0036
- Page: https://openairdocs.org/ntsb/ANC66A0036

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
A-0001  66/3/10    REEF ISLAND ALAS.   GRUMMAN G-21A       CR-  0  0  1  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 1714                    CF-MSK              PX-  6  0  0                            41, 12719 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            246 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        OPERATOR - OTHER-FOREIGN FLAG CARRIER
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           UNDERSHOOT                                               LANDING: FINAL APPROACH
           COLLIDED WITH: WIRES/POLES                               LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - CONTINUED VFR FLIGHT INTO ADVERSE WEATHER CONDITIONS
           PILOT IN COMMAND - MISJUDGED ALTITUDE AND CLEARANCE
        FACTOR(S)
           WEATHER - LOW CEILING
           WEATHER - SNOW
           WEATHER - UNFAVORABLE WIND CONDITIONS
           WEATHER - DOWNDRAFT,UPDRAFTS
           MISCELLANEOUS ACTS,CONDITIONS - FAILED TO EXTEND THE LANDING FLAPS
        WEATHER BRIEFING - BRIEFING RECEIVED-METHOD UNKNOWN
        WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT
        MISSING AIRCRAFT - LATER RECOVERED
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING OFF AIRPORT
                                  ADVERSE/UNFAVORABLE WEATHER
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          OVERCAST                                                  200
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          1/2 MILE OR LESS                                         SNOW
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          BLOWING SNOW                                              34
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          135                                                       35
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          IFR                                                      VFR
        REMARKS- RECOVERY DATE-03/11/66.AIRCRAFT SANK IN PORTLAND CANAL. CANADIAN REGISTRY.
```

## Aircraft

- Registration: CF-MSK (not matched to a registry record)
- Reported make and model: GRUMMAN G-21A
- Category: Airplane
- Engines: reciprocating
- 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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