# NTSB NYC91LA032: Burkhart Grob G103A, N923BG, Erwinna, PA, November 19, 1990

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Limited investigation · Final report
- Date: November 19, 1990, 15:45 local (20:45 UTC)
- Place: Erwinna, PA
- Coordinates: 40.490104, -75.080482 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.4901&lon=-75.0805&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 1 minor
- Status: Completed, report April 6, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 36846
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC91LA032
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/36846/pdf
- Page: https://openairdocs.org/ntsb/NYC91LA032

## Probable cause

THE STUDENT PILOT'S IMPROPER LANDING TECHNIQUE AND THE INSTRUCTOR'S INADEQUATE SUPERVISION.

## Sequence of events

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

- Hard landing, landing - flare/touchdown
  - level off - improper, dual student (cause)
  - supervision - inadequate, pilot in command(cfi) (cause)

## Analysis

THE STUDENT WAS PREPARING FOR HIS PRIVATE PILOT CHECK RIDE, AND HIS INSTRUCTOR WAS SUPERVISING FROM THE REAR SEAT OF THE GLIDER. THE GLIDER MADE A HARD LANDING WITH THE NOSE WHEEL TOUCHING FIRST.

## Aircraft

- Registration: [N923BG](https://openairdocs.org/aircraft/N923BG), registered now, S/N 34037-K-268 (OpenAirDocs)
- Reported make and model: BURKHART GROB G103A
- Registry model: [Burkhart Grob G-103A TWIN II ACRO](https://openairdocs.org/model/burkhart-grob-g-103a-twin-ii-acro) (registry code 1660206) (OpenAirDocs)
- Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs)
- Category: Glider
- Serial number: 34037-K-268
- Engines: unknown
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Registered owner: Freedom'S Wing Int., Inc.
- Airworthiness certificate: Standard, Aerobatic
- Airport: 9N1, Vansant, runway 7, 3,058 × 120 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 47; commercial, flight instructor; airplane ratings: single-engine land; seat: rear; flight hours: 850 total, 450 in this make and model, 670 as pilot in command

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 50 °F

## 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 19901119051539A](https://openairdocs.org/incident/19901119051539A), Nov 19, 1990: Grob G103ATWINII, Erwinna, PA, Substantial damage. Student failed to flare properly on landing damaging nose wheel and tail. CFI reports he failed to timely correct.

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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