# NTSB DEN71AD044: Schleicher AS-W15, N3644, Boulder, CO, June 5, 1971

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: June 5, 1971
- 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: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report January 20, 1972
- Report: Brief approved by the director
- Safety recommendations: Yes
- NTSB case key (mKey): 80096
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN71AD044
- Page: https://openairdocs.org/ntsb/DEN71AD044

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1696   71/6/5    BOULDER,COLO        SCHLEICHER AS-W15   CR-  1  0  0  NONCOMMERCIAL             STUDENT, AGE 29, 30 TOTAL
        TIME - 1650                    N3644               PX-  0  0  0  PLEASURE/PERSONAL TRANSP  HOURS, 0 IN TYPE, NOT
                                       DAMAGE-DESTROYED    OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - BOULDER MUNI
        DEPARTURE POINT             INTENDED DESTINATION
          BOULDER,COLO                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: OTHER
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           PERSONNEL - PRODUCTION-DESIGN-PERSONNEL: OTHER
           AIRFRAME - FLIGHT CONTROL SURFACES: ELEVATOR ASSEMBLY,ATTACHMENTS
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        REMARKS- UPPER,LWR SECTIONS R ELEV SEPD.ABSENCE OF ADEQUATE ADHESIVE BOND ALONG LEADING,OUTBOARD EDGES.
```

## Aircraft

- Registration: [N3644](https://openairdocs.org/deregistered/N3644-1971-08-24), registration cancelled 1971-08-24, S/N 15079, built 1970 (OpenAirDocs)
- Reported make and model: SCHLEICHER AS-W15
- Registry model: [Schleicher ASW-15](https://openairdocs.org/model/schleicher-asw-15) (registry code 38015HZ) (OpenAirDocs)
- Category: Glider
- Engines: none
- Damage: Destroyed
- Airport: Boulder Muni

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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