# NTSB ANC75DAA09: Piper PA-18, N7799D, Prospect Crk, AK, August 15, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 15, 1974
- Place: Prospect Crk, AK · PROSPECT CRK, AK
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report September 18, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 134466
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC75DAA09
- Page: https://openairdocs.org/ntsb/ANC75DAA09

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2373  74/8/15  NR.PROSPECT CRK,ALAS  PIPER PA-18         CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 29, 320
        TIME - 1905                    N7799D              PX-  0  0  1  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 257 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          BETTLES,ALAS                FAIRBANKS,ALAS
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: CONTROLLED                  IN FLIGHT: OTHER
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER IN-FLIGHT DECISIONS OR PLANNING
        FACTOR(S)
           WEATHER - DOWNDRAFT,UPDRAFTS
           WEATHER - ADVERSE WINDS ALOFT
           MISCELLANEOUS ACTS,CONDITIONS - FLEW INTO BLIND CANYON
        WEATHER BRIEFING - SELF-HELP,PILOT CHECKED WEATHER DATA
        WEATHER FORECAST - UNKNOWN/NOT REPORTED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          SCATTERED                                                UNKNOWN/NOT REPORTED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      50
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          280                                                       10
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
        REMARKS- ENCOUNTERED DOWNDRAFT.UN OUTCLIMB RISING TERRAIN.
```

## Aircraft

- Registration: [N7799D](https://openairdocs.org/aircraft/N7799D), registered now, S/N 18-6008, built 1957 (OpenAirDocs)
- Reported make and model: PIPER PA-18
- Registry model: [Piper PA-18A 150](https://openairdocs.org/model/piper-pa-18a-150) (registry code 7101837) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19740815026049A](https://openairdocs.org/incident/19740815026049A), Aug 15, 1974: Piper PA18A150, Prospect Crk, AK, Substantial damage. Encountered downdraft. Un outclimb rising terrain.

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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