# NTSB FTW93LA104: Cessna 172M, N9689H, Overbrook, OK, March 15, 1993 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: March 14, 1993, 18:45 local (Mar 15, 1993, 00:45 UTC) - Place: Overbrook, OK - Coordinates: 34.059871, -97.139126 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=34.0599&lon=-97.1391&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 4 uninjured - Status: Completed, report October 25, 1993 - Report: Approved by Office Director - NTSB case key (mKey): 18712 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW93LA104 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/18712/pdf - Page: https://openairdocs.org/ntsb/FTW93LA104 ## Probable cause THE PILOT'S FAILURE TO ASSURE THAT THE ELEVATOR TRIM WAS PROPERLY SET FOR TAKEOFF AND HIS DELAY IN ABORTING THE TAKEOFF ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Overrun, takeoff - aborted - flt control syst,elevator trim/tab control - incorrect (cause) - aborted takeoff - delayed, pilot in command (cause) - On ground/water encounter with terrain/water, takeoff - aborted - terrain condition - ditch ## Analysis THE PILOT ABORTED THE TAKEOFF AFTER REACHING 60 KNOTS BECAUSE HE DID NOT THINK HE COULD SAFELY TAKEOFF IN THE DISTANCE REMAINING. HE WAS UNABLE TO STOP THE AIRPLANE ON THE REMAINING RUNWAY. THE AIRPLANE SUBSEQUENTLY STRUCK A DITCH. THE RUNWAY HAD A CREST IN IT AND RAN UPHILL FOR THE FIRST 1,800 FEET OF THE 2,500 FEET AVAILABLE. THE ELEVATOR TRIM WAS FOUND IN THE FULL NOSE DOWN SETTING. IT WAS THE PILOT'S FIRST EXPERIENCE AT THE ACCIDENT AIRPORT AND HIS FIRST FLIGHT IN THE ACCIDENT MAKE AND MODEL WITH FOUR PEOPLE ONBOARD ## Factual narrative On Sunday, March 14, 1993, at approximately 1845 central standard time, a Cessna 172M, N9689H, was substantially damaged when it collided with a ditch during an aborted takeoff at the Lake Murray State Park airport, near Overbrook, Oklahoma. The airplane, owned and operated by Monarch Air, and rented to the commercial pilot, was departing on a 14 CFR Part 91 personal flight. There was no flight plan filed and visual meteorological conditions prevailed throughout the area. Neither the pilot or any of the three passengers were injured. The pilot stated he initiated his takeoff roll from the numbers on runway 14 and that as he applied full power, all engine instruments were indicating normal. The runway had a crest in it and ran uphill for about the first 1,800 feet of the 2,500 feet available. The pilot stated the airplane did not seem to accelerate normally during the ground roll and that he had reached 55 to 60 knots when he topped the crest. He decided that he did not have enough runway remaining to safely execute the takeoff and aborted. The airplane ran off the end of the runway and collided with a ditch. All three landing gear collapsed after colliding with the ditch. The elevator trim was found in the full nose down position following the accident. Following the accident, the engine was test run in the airframe and found to operate within normal parameters. It was the pilot's first flight in a Cessna 172 with four persons aboard and his first takeoff from the accident airport. ## Aircraft - Registration: [N9689H](https://openairdocs.org/deregistered/N9689H-1994-06-22), registration cancelled 1994-06-22, S/N 17266316 (OpenAirDocs) - Reported make and model: CESSNA 172M - Registry model: [Cessna 172M](https://openairdocs.org/model/cessna-172m) (registry code 2072418) (OpenAirDocs) - Category: Airplane - Serial number: 17266316 - Airframe hours: 2500 - Engines: LYCOMING O-320-E2D 150 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Menagerie Enterprises, doing business as Monarch Air - Registered owner: Menagerie Enterprises - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, February 28, 1993, 20 hours before - Departed: 1F1 - Destination: TKI, MCKINNEY, TX - Airport: 1F1, Lake Murray St. Pk., runway 14, 2,500 × 50 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 40; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 281 total, 38 in this make and model, 134 as pilot in command, 9 in the last 90 days, 7 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Dusk - Wind: 210° at 10 knots - Visibility: 15 statute miles - Lowest ceiling: none - Temperature: 64 °F - Altimeter: 30.00 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 19930314005039A](https://openairdocs.org/incident/19930314005039A), Mar 14, 1993: Cessna 172M, Overbrook, OK, Substantial damage. Aborted takeoff roll after unable to rotate. Ran off end runway into ditch. Elevator trim full nose down. 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.