# NTSB CHI87LA082: Piper PA-28-235, N9451W, Oshkosh, WI, February 12, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: February 11, 1987, 21:15 local (Feb 12, 1987, 03:15 UTC)
- Place: Oshkosh, WI
- Coordinates: 44.060039, -88.540229 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.0600&lon=-88.5402&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed, report March 30, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 13733
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI87LA082
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13733/pdf
- Page: https://openairdocs.org/ntsb/CHI87LA082

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, climb - to cruise
  - engine assembly - undetermined (cause)
- Forced landing, climb - to cruise
  - flt control syst,aileron control - jammed (cause)
- In flight collision with object, landing - flare/touchdown
  - object - fence

## Analysis

ACCORDING TO THE PLT, AT APRX 1800 FEET 'THE ENGINE ABRUPTLY QUIT WITH NO RUNON OR SPUTTER' FOLLOWING TAKEOFF FROM RWY 18 AT OSHKOSH, WI. THE PLT STATED THAT HE BANKED THE ACFT BACK TO THE AIRPORT, BUT THE AILERON CONTROLS BECAME JAMMED OR 'FROZEN'. ACCORDING TO THE PLT, HE FLARED THE ACFT IN A LANDING CONFIGURATION AND THE ACFT STRUCK A FENCE AND POSTS, AT WHICH TIME THE AILERON CONTROLS 'BROKE FREE.' THE ACFT CAME TO REST APRX 50 YARDS EAST OF THE TAXIWAY FOR RWY 18. AN ENGINE RUN-UP WAS PERFORMED AND NO DEFECTS WERE NOTED. NO RESTRICTIONS IN THE FLIGHT CONTROL CABLES WERE DETECTED AND THE AUTOPILOT ROLL SERVO BENCH TESTED SATISFACTORILY.

## Aircraft

- Registration: [N9451W](https://openairdocs.org/deregistered/N9451W-2013-01-17), registration cancelled 2013-01-17, S/N 28-11170, built 1968 (OpenAirDocs)
- Reported make and model: PIPER PA-28-235
- Registry model: [Piper PA-28-235](https://openairdocs.org/model/piper-pa-28-235) (registry code 7102810) (OpenAirDocs)
- Registry engine: [Lycoming 0-540 series](https://openairdocs.org/engine/lycoming-0-540-series) (registry code 41532, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 28-11170
- Airframe hours: 2065
- Engines: LYCOMING O-540-B4B5 235 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: G.A.A. Oil Company, Inc.
- Registered owner: Gaa Oil Company Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, March 3, 1986, 84 hours before
- Destination: WI10, WESTOSHA, WI
- Airport: OSH, Wittman Field

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 40; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 593 total, 100 in this make and model, 506 as pilot in command, 38 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Night/bright
- Wind: 180° at 5 knots
- Visibility: 5 statute miles
- Lowest ceiling: 15,000 ft overcast
- Temperature: 34 °F
- Altimeter: 29.00 inHg
- Observed at: OSH, 1 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 19870211005439A](https://openairdocs.org/incident/19870211005439A), Feb 11, 1987: Piper PA28235, Oshkosh, WI, Substantial damage. The engine failed after takeoff. A disconnected servo restricted the ailerons. Aircraft landed beside runway.

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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