# NTSB UNK66X0139: Maule M-4, N4726T, Vancouver, Canada, April 21, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 21, 1966
- Place: Vancouver, Canada · VANCOUVER,B.C.CAN, CD
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report July 30, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 171445
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK66X0139
- Page: https://openairdocs.org/ntsb/UNK66X0139

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
6-0103  66/4/21    VANCOUVER,B.C.CAN   MAULE M-4           CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE Z , 4100
        TIME - 1525                    N4726T              PX-  0  0  1  TEST                      TOTAL HOURS, 300 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            UNK/NR INSTRUMENT RATED.
        NAME OF AIRPORT - FRASER RIVER
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: LEVEL OFF/TOUCHDOWN
           GEAR COLLAPSED                                           LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER LEVEL OFF
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        REMARKS- INVESTIGATED AND REPORTED BY GOVT OF CANADA.FLOAT EQUIPPED. INTENTIONAL HARD LNDG-TEST PURPOSES.
```

## Aircraft

- Registration: [N4726T](https://openairdocs.org/deregistered/N4726T-2018-01-24), registration cancelled 2018-01-24, S/N 1001, built 1964 (OpenAirDocs)
- Reported make and model: MAULE M-4
- Registry model: [Maule M-4-210](https://openairdocs.org/model/maule-m-4-210) (registry code 5460108) (OpenAirDocs)
- Registry engine: [Continental IO-360 series](https://openairdocs.org/engine/continental-io-360-series) (registry code 17025, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Fraser River

## Other investigations on N4726T (2)

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 ANC96LA136](https://openairdocs.org/ntsb/ANC96LA136), Sep 3, 1996: Maule M-4 (N4726T), Skwentna, AK, substantial damage. Probable cause: The pilot's selection of an unsuitable landing site. A factor associated with the accident was the rough and uneven terrain.
- [NTSB ANC70D0053](https://openairdocs.org/ntsb/ANC70D0053), Sep 4, 1969: Maule M4-210 (N4726T), 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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