# NTSB FTW94LA072: Cessna 152, N6374M, Tulsa, OK, January 21, 1994 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: January 21, 1994, 11:41 local (17:41 UTC) - Place: Tulsa, OK - Location: 36.0396° N, 95.9846° W: Placed by OpenAirDocs at TULSA RIVERSIDE (RVS), within about a mile (OpenAirDocs) - Nearby events: https://openairdocs.org/map.md?lat=36.0396&lon=-95.9846&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 1 minor - Status: Completed, report November 14, 1994 - Report: Approved by Office Director - NTSB case key (mKey): 18993 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW94LA072 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/18993/pdf - Page: https://openairdocs.org/ntsb/FTW94LA072 ## Probable cause THE STUDENT PILOT'S IMPROPER BRAKING TECHNIQUE AND THE RESULTANT FAILURE TO MAINTAIN DIRECTIONAL CONTROL. A FACTOR WAS THE PILOT NOT OBTAINING AN ATC CLEARANCE PRIOR TO TAKEOFF. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - on ground/water, takeoff - aborted - atc clearance - not obtained, pilot in command (contributing factor) - brakes(normal) - improper use of, pilot in command (cause) - directional control - not maintained, pilot in command (cause) - On ground/water collision with object, takeoff - aborted - object - approach light/navaid - On ground/water encounter with terrain/water, takeoff - aborted - terrain condition - ditch ## Analysis THE PILOT RECEIVED A CLEARANCE TO TAXI INTO POSITION AND HOLD ON RUNWAY 19R. SHORTLY AFTER HOLDING THE PILOT HEARD WHAT HE BELIEVED TO BE A CLEARANCE FOR HIM TO TAKEOFF. HE ACKNOWLEDGED THE CLEARANCE AND INITIATED A TAKEOFF ROLL. AFTER THE AIRCRAFT ATTAINED MINIMUM FLYING AIRSPEED, HE WAS INSTRUCTED TO ABORT THE TAKEOFF. HE REDUCED POWER AND BEGAN BRAKING. THE PILOT STATED, 'THE LEFT BRAKE GRABBED MORE THAN THE RIGHT', AND THE AIRCRAFT WAS REPORTED VEERING TO THE LEFT, DEPARTING THE RUNWAY, AND STRIKING A 'PAPI' LIGHT. IN ONE OF THE TWO SUBMITTED STUDENT PILOT STATEMENTS HE REPORTED THAT 'APPARENTLY THE LEFT BRAKE WAS HIT HARDER THAN THE RIGHT.' ## Factual narrative On January 21, 1994 at 1141 central standard time, a Cessna 152, N6374M, was substantially damaged during an aborted takeoff at the Tulsa, Oklahoma, Richard L. Jones, Jr. Airport. The student pilot sustained minor injuries. Visual meteorological conditions prevailed for the solo instructional flight. Tower personnel reported that the aircraft was cleared to taxi into position and hold on runway 19R. Shortly after holding, the aircraft initiated a takeoff roll without clearance. The tower instructed the pilot to abort the takeoff. The pilot reported that he heard what he believed to be a clearance for him to takeoff, which he acknowledged. After the aircraft attained minimum flying airspeed, he was instructed to abort the takeoff. He then reduced power and began braking. The pilot reported, "the left brake grabbed harder than the right and I turned toward the ditch." He further stated that the airplane departed the runway, struck a PAPI light, and came to rest in sand. No mechanical malfunctions were reported. In a statement signed by the student pilot dated January 20, 1994, he reported that "apparently the left brake was pushed harder than the right." ## Aircraft - Registration: N6374M (not matched to a registry record) - Reported make and model: CESSNA 152 - Category: Airplane - Serial number: 15284697 - Airframe hours: 5177 - Engines: LYCOMING O-235-L2C 110 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Operator: Spartan Aeronautics, doing business as Spartan School Of Aeronautics - Registered owner: Christiansen Aviation, Inc. - Airworthiness certificate: Standard, Utility - Last inspection: 100 hour, December 8, 1993, 67 hours before - Airport: RVS, Richard Lloyd Jones, runway 19R, 5,099 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 20; student; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 55 total, 55 in this make and model, 11 in the last 90 days, 2 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 220° at 4 knots - Visibility: 6 statute miles - Lowest ceiling: none - Temperature: 39 °F, dew point 28 °F - Altimeter: 30.00 inHg - Observed at: RVS ## 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 19940121006219A](https://openairdocs.org/incident/19940121006219A), Jan 21, 1994: Cessna 152, Tulsa, OK, Substantial damage. Holding took off without a clearance. Tower advised to abort. Lost control braking. Ran off 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. --- 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.