# NTSB NYC91LA240: Piper PA-22, N9741D, Slippery Rock, PA, September 18, 1991

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: September 18, 1991, 15:49 local (19:49 UTC)
- Place: Slippery Rock, PA
- Coordinates: 41.069999, -80.059783 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.0700&lon=-80.0598&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report May 27, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 37014
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC91LA240
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/37014/pdf
- Page: https://openairdocs.org/ntsb/NYC91LA240

## Probable cause

THE ON GROUND COLLISION WITH A FARM VEHICLE DURING LANDING ROLL OUT.

## Sequence of events

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

- Airframe/component/system failure/malfunction, cruise - normal
  - window,flight compartment window/windshield - fractured (cause)
  - aircraft control - not possible, pilot in command
- Forced landing, descent - emergency
- On ground/water collision with object, landing - roll
  - object - vehicle (cause)

## Analysis

WHILE AT CRUISE ALTITUDE THE PILOT HEARD A BANG AND SAID ABOUT THE UPPER 1/3 OF THE WINDSHEILD HAD BROKEN. THE PILOT ELECTED TO MAKE A FORCED LANDING IN A FIELD AND STRUCK A FARM PLOW THAT WAS OBSTRUCTED FROM VIEW BY TALL GRASS. IT WAS NOT DETERMINED WHETHER THE WINDSHEILD WAS DEFECTIVE OR THEY STRUCK SOMETHING IN FLIGHT.

## Aircraft

- Registration: [N9741D](https://openairdocs.org/deregistered/N9741D-1998-02-13), registration cancelled 1998-02-13, S/N 226654 (OpenAirDocs)
- Reported make and model: PIPER PA-22
- Registry model: [Piper PA-22-160](https://openairdocs.org/model/piper-pa-22-160) (registry code 7102214) (OpenAirDocs)
- Category: Airplane
- Serial number: 22-6654
- Airframe hours: 4982
- Engines: LYCOMING O-320-B2A 160 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Charles Davey
- Registered owner: Charles Davey
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, September 11, 1991, 5 hours before
- Departed: 3G9, BUTLER, PA
- Destination: NONE, MERCER, PA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 59; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 2,880 total, 1,625 in this make and model, 2,820 as pilot in command, 76 in the last 90 days, 23 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 250° at 15 knots, gusting 20
- Visibility: 15 statute miles
- Temperature: 81 °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 19910918040959A](https://openairdocs.org/incident/19910918040959A), Sep 18, 1991: Piper PA22160, Slippery Rock, PA, Substantial damage. Windshield broke in flight. Caused vibrating flight. Tried to land at airport but missed runway. Hit plow in weeds.

## Other investigations on N9741D (1)

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.

- [NTSB NYC79FGM33](https://openairdocs.org/ntsb/NYC79FGM33), Jul 7, 1979: Piper PA-22 (N9741D), Zelienople, PA, substantial damage

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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