# NTSB NYC83LA099: Schweizer SGS-2-33A, N2706H, Erwinna, PA, April 17, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 17, 1983, 13:50 local (18:50 UTC)
- Place: Erwinna, PA
- Coordinates: 40.490367, -75.079338 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.4904&lon=-75.0793&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 35174
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC83LA099
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/35174/pdf
- Page: https://openairdocs.org/ntsb/NYC83LA099

## Sequence of events

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

- Undershoot, approach - vfr pattern - final approach
  - weather condition - unfavorable wind (contributing factor)
  - weather condition - crosswind (contributing factor)
  - weather condition - gusts (contributing factor)
  - compensation for wind conditions - improper, dual student (cause)
  - supervision - inadequate, pilot in command(cfi) (cause)
- In flight collision with object, approach - vfr pattern - final approach
  - object - tree(s) (contributing factor)

## Analysis

THE GLIDER WAS ON A DUAL INSTRUCTIONAL FLIGHT FOR LANDING PRACTICE. ON THE FINAL APPROACH TO LANDING THE GLIDER LOST LIFT AFTER EXPERIENCING EXCESSIVE SINK AND CLIPPED THE TOPS OF TREES. THE GLIDER LANDED SHORT OF THE INTENDED AREA AND THE WINGS AND NOSE OF THE ACFT WERE DAMAGED. THE WIND WAS REPORTED FROM 320 DEG AT 12 GUSTING 16 KTS.

## Aircraft

- Registration: [N2706H](https://openairdocs.org/aircraft/N2706H), registered now, S/N 456, built 1976 (OpenAirDocs)
- Reported make and model: SCHWEIZER SGS-2-33A
- Registry model: [Schweizer SGS 2-33A](https://openairdocs.org/model/schweizer-sgs-2-33a) (registry code 8051606) (OpenAirDocs)
- Registry engine: [NONE](https://openairdocs.org/engine/none) (registry code 00000, none) (OpenAirDocs)
- Category: Glider
- Serial number: 456
- Airframe hours: 1584
- Engines: NONE unknown
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Registered owner: Allen Severn
- Airworthiness certificate: Standard, Normal
- Last inspection: Unknown, July 10, 1982, 1,484 hours before
- Departed: 9N1, ERWINNA, PA
- Flight plan: Unknown
- Airport: 9N1, Vansant, runway 25, 3,000 × 200 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; commercial, flight instructor; airplane ratings: single-engine land; medical: unknown, unknown; seat: rear; flight hours: 2,104 total, 170 in this make and model, 170 as pilot in command, 40 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 320° at 12 knots, gusting 16
- Visibility: 12 statute miles
- Lowest ceiling: none

## 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 19830417013799A](https://openairdocs.org/incident/19830417013799A), Apr 17, 1983: Scwzer SGS233A, Erwinna, PA, Substantial damage. Lost lift on final. Clipped tree tops. Landed short. CFI failed to act.

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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