# NTSB ANC93LA089: Piper PA-3, N91952, Knik, AK, June 12, 1993 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: June 12, 1993, 10:30 local (18:30 UTC) - Place: Knik, AK - Location: 61.3959° N, 149.8724° W: Placed by OpenAirDocs from NTSB’s distance and direction from GOOSE BAY (Z40), within about a mile (OpenAirDocs) - Nearby events: https://openairdocs.org/map.md?lat=61.3959&lon=-149.8724&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 1 minor, 1 uninjured - Status: Completed, report June 30, 1994 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - NTSB case key (mKey): 2357 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC93LA089 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/2357/pdf - Page: https://openairdocs.org/ntsb/ANC93LA089 ## Probable cause THE IMPROPER USE OF THE FLIGHT CONTROLS BY THE STUDENT PILOT AND INADEQUATE SUPERVISION BY THE CFI PILOT-IN-COMMAND. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - on ground/water, landing - roll - flight controls - improper use of, dual student (cause) - supervision - inadequate, pilot in command(cfi) (cause) ## Analysis THE INSTRUCTIONAL FLIGHT, WITH THE STUDENT PILOT AT THE CONTROLS, HAD JUST COMPLETED SEVERAL FULL STOP WHEEL LANDINGS AT THE AIRPORT. ON THE ACCIDENT FLIGHT, THE STUDENT RETARDED THE THROTTLE TO IDLE AND BEGAN ERRATIC LONGITUDINAL CONTROL ON THE LANDING ROLLOUT. THE INSTRUCTOR PILOT INITIATED LEFT RUDDER TO STRAIGHTEN DIRECTIONAL CONTROL AND APPLIED ELEVATOR CONTROL TO GET THE TAILWHEEL ON THE GROUND AT THE SAME TIME THAT THE STUDENT DEPRESSED THE BRAKE PEDALS. THE AIRPLANE PROCEEDED TO GO UP ONTO ITS NOSE AND OVER ONTO ITS BACK. PRIOR TO THE MISHAP FLIGHT, THE INSTRUCTOR TOLD THE STUDENT THAT THE AIRPLANE WAS EQUIPPED WITH DUAL PUCK CLEVELAND BRAKES, THAT THE BRAKES WERE VERY SENSITIVE, AND AS SUCH TO STAY OFF THE BRAKES. ## Factual narrative On June 12, 1993, at 1030 Alaska daylight time, a wheel equipped Piper PA3 Cub airplane, N91952, flown by the student pilot on board the airplane, crashed during the landing rollout on runway 25 at Goose Bay Airport, Alaska. The flight instructor, who was also the pilot in command of the flight, received minor injuries, the student pilot was not injured, and the airplane sustained substantial damage. The flight, which originated at Merrill Field in Anchorage, Alaska, earlier in the day, was being conducted under 14 CFR Part 91 for the purpose of providing flight instruction to the student pilot who had recently purchased the airplane. Visual meteorological conditions prevailed and a VFR flight plan was not filed. The flight instructor and the student pilot were interviewed on separate occasions via telephone by the NTSB investigator in charge. Both individuals reported that shortly before the mishap, the student had completed several full stop wheel landings at the Goose Bay Airport. The instructor alerted the student to the fact that the airplane was equipped with dual puck Cleveland brakes, that the brakes were very sensitive, and as such to stay off the brakes. On the accident flight, the student retarded the throttle to idle and began erratic longitudinal control on the rollout. The instructor said that he used left rudder to straighten the directional control and elevator control to get the tailwheel on the ground at the same time that the student applied the brakes. The airplane proceeded to go up onto its nose and over onto its back. ## Aircraft - Registration: [N91952](https://openairdocs.org/aircraft/N91952), registered now, S/N 16372 (OpenAirDocs) - Reported make and model: PIPER PA-3 - Registry model: [Piper J3C-65](https://openairdocs.org/model/piper-j3c-65) (registry code 7100510) (OpenAirDocs) - Registry engine: [Continental A&C75 series](https://openairdocs.org/engine/continental-a-c75-series) (registry code 17005, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 16372 - Airframe hours: 3500 - Engines: CONTINENTAL C85 85 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Operator: Tanner, John - Registered owner: Tanner, John - Airworthiness certificate: Standard, Normal - Departed: MRI, MERRILL FIELD, AK - Destination: Z40, GOOSE BAY, AK - Airport: Z40, Goose Bay, runway 25, 3,000 × 50 ft, gravel ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 43; commercial, flight instructor; airplane ratings: single-engine land, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: rear; flight hours: 4,591 total, 350 in this make and model, 98 in the last 90 days, 41 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 50 statute miles - Lowest ceiling: none - Temperature: 64 °F ## 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 19930612018059A](https://openairdocs.org/incident/19930612018059A), Jun 12, 1993: Piper STCJ3, Goose Bay, AK, Substantial damage. Student over control rudder on landing roll. CFI took over. Student used brakes. J3 nosed over. Sensitive brakes. 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.