# NTSB DEN70AD056: Piper PA-28R, N4555J, Boulder, CO, May 20, 1970

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: May 20, 1970
- Place: Boulder, CO · BOULDER, CO
- Location: 40.0244° N, 105.2513° W: Placed by OpenAirDocs: center of Boulder, CO, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.0244&lon=-105.2513&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report July 20, 1970
- Report: Brief approved by the director
- NTSB case key (mKey): 125265
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN70AD056
- Page: https://openairdocs.org/ntsb/DEN70AD056

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0430  70/5/20    BOULDER,COLO        PIPER PA-28R        CR-  2  0  0  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1507                    N4555J              PX-  0  0  0  DUAL                      AGE 29, 1486 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            1 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - BOULDER
        DEPARTURE POINT             INTENDED DESTINATION
          BOULDER,COLO                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           STALL: MUSH                                              TAKEOFF: INITIAL CLIMB
        PROBABLE CAUSE(S)
           DUAL STUDENT - FAILED TO OBTAIN/MAINTAIN FLYING SPEED
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
           PILOT IN COMMAND - LACK OF FAMILIARITY WITH AIRCRAFT
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - TOUCH AND GO LANDING
           WEATHER - HIGH DENSITY ALTITUDE
        WEATHER BRIEFING - UNKNOWN/NOT REPORTED
        WEATHER FORECAST - UNKNOWN/NOT REPORTED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      86
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
         FIRE AFTER IMPACT
        REMARKS- HIT TOP OF TREE AT ALT SLIGHTLY LWR THAN RWY 200 FT PAST RWY END.DNSTY ALT 8000FT.LDG GR EXTENDED.
```

## Aircraft

- Registration: [N4555J](https://openairdocs.org/deregistered/N4555J-1970-07-27), registration cancelled 1970-07-27, S/N 28R-30416, built 1968 (OpenAirDocs)
- Reported make and model: PIPER PA-28R
- Registry model: [Piper PA-28R-180](https://openairdocs.org/model/piper-pa-28r-180) (registry code 7102809) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed
- Airport: Boulder

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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