# NTSB ATL87DLT01: Schleicher ASK-21, N174KS, Eagleville, TN, April 17, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: April 17, 1987, 11:30 local (16:30 UTC)
- Place: Eagleville, TN
- Coordinates: 35.010238, -85.709823 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=35.0102&lon=-85.7098&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report November 8, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 7249
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL87DLT01
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/7249/pdf
- Page: https://openairdocs.org/ntsb/ATL87DLT01

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- In flight collision with object, approach - vfr pattern - final approach
  - object - tree(s)
  - weather condition - downdraft
  - planned approach - misjudged, dual student (cause)
  - supervision - inadequate, pilot in command(cfi) (cause)
- Loss of control - in flight, approach - vfr pattern - final approach

## Analysis

DURING A LANDING ATTEMPT, N174KS COLLIDED WITH A TREELINE ON FINAL APPROACH TO THE AIRPORT. THE INSTRUCTOR REPORTED THAT THE FLIGHT WAS NORMAL UNTIL THE STUDENT ENCOUNTERED A DOWNDRAFT ON FINAL APPROACH. THE INSTRUCTOR TOOK CONTROL OF THE CONTROLS, BUT WAS UNABLE REGAIN THE LOST ALTITUDE AND AIRSPEED. THE GLIDER COLLIDED WITH A TREE STALLED AND CRASHED. THE INSTRUCTOR DID NOT REPORT ANY GLIDER CONTROL OR SYSTEM PROBLEMS.

## Aircraft

- Registration: [N174KS](https://openairdocs.org/deregistered/N174KS-1988-06-17), registration cancelled 1988-06-17, S/N 21194 (OpenAirDocs)
- Reported make and model: SCHLEICHER ASK-21
- Registry model: [Schleicher ASK-21](https://openairdocs.org/model/schleicher-ask-21) (registry code 38015GY) (OpenAirDocs)
- Category: Glider
- Serial number: 21194
- Engines: unknown
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Registered owner: Bill Mcfarlane
- Airworthiness certificate: Standard, Utility
- Airport: 50M, Eagleville, runway 32, 2,200 × 18 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 36; flight instructor, commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: rear; flight hours: 536 total, 18 in this make and model, 536 as pilot in command, 11 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 5 statute miles
- Lowest ceiling: none
- Temperature: -0 °F, dew point -0 °F

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.