# NTSB FTW96LA300: Cessna 172P, N62511, Owasso, OK, July 4, 1996 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: July 4, 1996, 12:15 local (17:15 UTC) - Place: Owasso, OK - Coordinates: 36.279506, -95.829368 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=36.2795&lon=-95.8294&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report February 18, 1997 - Report: Approved by Office Director - NTSB case key (mKey): 19905 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW96LA300 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/19905/pdf - Page: https://openairdocs.org/ntsb/FTW96LA300 ## Probable cause Inadequate maintenance by maintenance personnel resulting in inoperative brake system during an aborted takeoff. A factor was the downhill runway condition. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Overrun, takeoff - roll/run - landing gear,normal brake system - inoperative (cause) - maintenance,annual inspection - inadequate, other maintenance personnel (cause) - aborted takeoff - initiated, pilot in command - airport facilities,runway/landing area condition - downhill (contributing factor) - On ground/water encounter with terrain/water, takeoff - roll/run - terrain condition - ditch ## Analysis In order to check the aircraft performance, the pilot decided not to fly the airplane until after conducting a 'highspeed taxi test.' During the test, the speed reached 40 knots and the pilot pulled the power to idle and applied the brakes. The brakes failed with 1,600 feet (the final 700 feet downgrade) of runway remaining and the airplane rolled beyond the departure end of the runway. Examination of the brake system by a mechanic, who had not performed previous work on the airplane, revealed the brake discs were worn beyond approved limits, and areas of the brake pads were worn down to the rivet heads. The wheel bearing grease was hard and all the bearings were dry and pitted. The right side brake cylinder was pitted and leaking. Dirt filled the brake master cylinders. The last annual inspection was completed on 6/10/96, and the airplane was returned to service by a mechanic with a FAA Inspection Authorization. ## Factual narrative On July 4, 1996, at 1215 central daylight time, a Cessna 172P, N62511, registered to and operated by a private owner under Title 14 CFR Part 91, overran the runway during an aborted takeoff at Gundys Airport, Owasso, Oklahoma. The private pilot was not injured and the airplane sustained substantial damage. Visual meteorological conditions prevailed for the personal flight and a flight plan was not filed. Local authorities reported to the FAA inspector that during the takeoff the pilot attempted an abort due to low engine RPM; however, the brakes failed and the airplane continued to roll. Subsequently, the airplane crossed a ditch and came to rest on a paved street. During interviews, conducted by the investigator-in-charge, and on the Pilot/Operator Report, the pilot reported the following information. On June 10, 1996, during a static engine runup, 2,000 RPM was indicated; however, after changing the air filter the static RPM was 2,300. The pilot flew the airplane from Bartlesville, Oklahoma, to Gundys Airport on June 23, 1996, for a new interior. On July 4, 1996, the pilot returned to Gundys to get the airplane, completed the preflight and conducted a static runup indicating 2,300 RPM. In order to check the aircraft performance, the pilot decided not to fly the airplane until after conducting a "highspeed taxi test." During the test, the speed reached 40 knots and the pilot pulled the power to idle and applied the brakes. The brakes failed with 1,600 feet (the final 700 feet downgrade) of runway remaining and the airplane rolled beyond the departure end of the runway, crossed a ditch and a road before coming to rest. The FAA inspector and the owner examined the airplane and reported damage to the nose gear, lower engine mounts and the engine firewall. Upon testing the brakes, the FAA inspector did not find any discrepancies that would have prevented stopping the airplane. The owner secured the airplane for examination by a mechanic. On July 22, 1996, a mechanic examined the airplane and reported the following brake system discrepancies. The brake discs were worn beyond approved limits and areas of the brake pads were worn down to the rivet heads. The wheel bearing grease was hard and all the bearings were dry and pitted. The right side brake cylinder was pitted and leaking. Dirt filled the brake master cylinders. A review of the maintenance records by the NTSB investigator-in-charge revealed that the last annual inspection was completed on June 10, 1996, and the airplane was returned to service by a maintenance mechanic with a FAA Inspection Authorization. ## Aircraft - Registration: [N62511](https://openairdocs.org/aircraft/N62511), registered now, S/N 17275289, built 1981 (OpenAirDocs) - Reported make and model: Cessna 172P - Registry model: [Cessna 172P](https://openairdocs.org/model/cessna-172p) (registry code 2072436) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 17275289 - Engines: Lycoming O-320-D2J 160 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: John R. Pettigrove - Airworthiness certificate: Standard, Normal - Last inspection: Annual, June 10, 1996, 15 hours before - Airport: OK16, Gundys, runway 17L, 2,620 × 30 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 83; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 822 total, 17 in this make and model, 27 in the last 90 days, 19 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 135° at 8 knots - Visibility: 10 statute miles - Temperature: 90 °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 19960704022829A](https://openairdocs.org/incident/19960704022829A), Jul 4, 1996: Cessna 172P, Owasso, OK, Substantial damage. Low engine RPM on takeoff. Aborted. Rolled off end runway. Hit ditch and street curb. Pilot failed use brakes. (-23) witnesses and local authorities reported… ## Other investigations on N62511 (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 NYC83LA161](https://openairdocs.org/ntsb/NYC83LA161), Jul 1, 1983: Cessna 172P (N62511), Redding, CT, 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. --- 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.