# NTSB CHI83LA320: Piper PA-20, N6996K, Mason, MI, July 14, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 13, 1983, 20:00 local (Jul 14, 1983, 00:00 UTC)
- Place: Mason, MI
- Location: 42.5807° N, 84.4423° W: Placed by OpenAirDocs: center of Mason, MI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.5807&lon=-84.4423&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12268
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI83LA320
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12268/pdf
- Page: https://openairdocs.org/ntsb/CHI83LA320

## Sequence of events

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

- Loss of control - on ground/water, landing - roll
  - supervision - inadequate, pilot in command(cfi) (cause)
  - ice/frost removal from aircraft - improper use of, dual student (cause)
  - directional control - not maintained, dual student (cause)
  - ground loop/swerve - inadvertent, dual student

## Analysis

THE STUDENT & INSTRUCTOR PLT (CFI) WERE PRACTICING LANDINGS IN THE STUDENT'S ACFT, WHICH WAS EQUIPPED WITH BRAKES ONLY ON THE LEFT SIDE. REPORTEDLY, THE STUDENT FLARED HIGH DURING A LANDING & THE CFI ADDED POWER TO RECOVER. AFTER TOUCHDOWN, THE ROLL-OUT WAS USING A LARGE PART OF THE RWY, SO THE CFI ASKED THE STUDENT TO APPLY BRAKES TO SLOW THE ACFT. THE BRAKES WERE APPLIED UNEVENLY, AND SUBSEQUENTLY, THE PLANE VEERED TO THE RIGHT & THE RIGHT WING WAS ULTIMATELY DAMAGED.

## Aircraft

- Registration: [N6996K](https://openairdocs.org/deregistered/N6996K-2022-07-02), registration cancelled 2022-07-02, S/N 20-92, built 1950 (OpenAirDocs)
- Reported make and model: PIPER PA-20
- Registry model: [Piper PA-20](https://openairdocs.org/model/piper-pa-20) (registry code 7102002) (OpenAirDocs)
- Registry engine: [Lycoming 0-290 series](https://openairdocs.org/engine/lycoming-0-290-series) (registry code 41506, 4 cycle) (OpenAirDocs)
- Category: Airplane
- Serial number: 20-104
- Engines: LYCOMING O-290-D2 135 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Davis Groh
- Registered owner: Milton Faynor
- Airworthiness certificate: Standard, Normal
- Airport: 2M17, Bergeon, runway 26, 2,200 × 100 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 21; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: right; flight hours: 691 total, 12 in this make and model, 645 as pilot in command, 34 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 200° at 5 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 86 °F, dew point 55 °F
- Altimeter: 30.00 inHg
- Observed at: LAN, 7 nm away

## 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 19830713035609A](https://openairdocs.org/incident/19830713035609A), Jul 13, 1983: Piper PA20, Mason, MI, Substantial damage. Aircraft ground looped during landing when student pilot applied brakes unevenly.

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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