# NTSB CHI96LA328: Cessna 182P, N6590M, Cahokia, IL, September 7, 1996 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: September 7, 1996, 09:45 local (14:45 UTC) - Place: Cahokia, IL - Coordinates: 38.640594, -90.140991 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=38.6406&lon=-90.1410&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report April 29, 1997 - Report: Approved by Office Director - NTSB case key (mKey): 10383 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI96LA328 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/10383/pdf - Page: https://openairdocs.org/ntsb/CHI96LA328 ## Probable cause the pilot misjudged his planned approach during the precautionary landing and the failed to obtain a proper touchdown point. Factors relating to the accident were: the loose oil filler cap, the uneven terrain on which the landing was made, the runway lights which were contacted, and the pilot's anxiety concerning the loss of oil and its effect on possible engine problems. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Airframe/component/system failure/malfunction, takeoff - initial climb - lubricating system,oil filler cap - not secured (contributing factor) - fluid,oil - siphoning - In flight collision with terrain/water, emergency landing after takeoff - precautionary landing - performed, pilot in command - planned approach - misjudged, pilot in command (cause) - anxiety/apprehension, pilot in command (contributing factor) - proper touchdown point - not obtained, pilot in command (cause) - terrain condition - rough/uneven (contributing factor) - On ground/water collision with object, emergency landing - object - runway light (contributing factor) ## Analysis Shortly after takeoff on runway 30L the pilot noted oil on the windshield. He contacted ATC and was cleared to land on any runway. The pilot chose runway 04 as he was 'anxious' to land the airplane. The airplane touched down off the left side of the runway, bounced up onto the runway and off the right side. It bounced again contacting runway lights on the right side of the runway. The airplane slowed as it traveled into the grass off the right side of the runway. The pilot regained control of the airplane and taxied back to the runway, then onto the taxiway. Postaccident inspection revealed the clip, which connected the oil filler cap to the chain, was binding. This could have given the false sensation that the filler cap was secured when in fact it may not have been. The oil filter and oil had been changed just prior to this flight. The pilot stated he checked the oil during the preflight after which he secured the cap. ## Factual narrative On September 9, 1996, at 0945 central daylight time, a Cessna 182P, N6590M, operated by a private pilot collided with the terrain and runway lights while making a forced landing at the St. Louis Downtown Parks Airport, Cahokia, Illinois. The personal 14 CFR Part 91 flight was being conducted in visual meteorological conditions without a flight plan. The airplane was substantially damaged and the pilot was not injured. The flight originated from the St. Louis Downtown Parks Airport just prior to the accident. The pilot stated that his intended destination was Brookfield, Wisconsin. Shortly after takeoff on runway 30L at an altitude of 400 to 500 feet agl, the windscreen became covered with oil. The pilot contacted the control tower and explained the situation. The control tower cleared the pilot to land on any runway. The pilot stated he left on the 20 degrees of flaps he used for takeoff and elected to land on runway 04. The pilot stated he chose this runway because it was the closest and he was "anxious" to land. He stated that in order to avoid flying over nearby houses he made tight turns to keep the airplane over the airport. The pilot reported that the airplane contacted the "ground left of runway 4 where it rises to the runway, bounced off the uphill slope, contacted the runway to the right side bounced just airborne and hit lights on right side of runway... ." The pilot was able to get the airplane back on the runway and eventually onto a taxiway. Once on the taxiway the pilot exited the airplane and discovered that the oil filler cap was not secured but instead was hanging by its chain. This was the first flight since having had maintenance performed on the airplane. The oil filter and oil had been changed during the maintenance. The pilot stated he checked the oil prior to the flight and remembered checking that the cap was secured. A Federal Aviation Administration Inspector inspected the filler cap after the accident. She reported that the slip which held the chain to the cap was binding and this could have resulted in the false sensation that the cap was secured when in fact it might not have been. ## Aircraft - Registration: [N6590M](https://openairdocs.org/aircraft/N6590M), registered now, S/N 18263768, built 1975 (OpenAirDocs) - Reported make and model: Cessna 182P - Registry model: [Cessna 182P](https://openairdocs.org/model/cessna-182p) (registry code 2075816) (OpenAirDocs) - Registry engine: [Continental O-470 series](https://openairdocs.org/engine/continental-o-470-series) (registry code 17026, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 18263768 - Airframe hours: 2479 - Engines: Continental TSIO-520-R 235 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Douglas M. Koehler - Airworthiness certificate: Standard, Normal - Last inspection: Annual, September 5, 1996, 0 hours before - Departed: CPS - Destination: 02C, BROOKFIELD, WI - Airport: CPS, St Louis Downtown - Park, runway 4, 2,799 × 75 ft, macadam ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 50; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 1,385 total, 570 in this make and model, 1,332 as pilot in command, 5 in the last 90 days, 5 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 240° at 6 knots - Visibility: 2 statute miles - Lowest ceiling: none - Temperature: 72 °F - Altimeter: 29.00 inHg ## 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 19960907047319A](https://openairdocs.org/incident/19960907047319A), Sep 7, 1996: Cessna 182P, Cahokia, IL, Substantial damage. (-16) The oil filler cap was improperly reinstalled after the engine oil was changed. The pilot checked that the cap was installed but failed to determine that… 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. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.