# Incident 20170808016989I: Diamond Aircraft Ind Gmbh DA 42, Prescott, AZ, August 8, 2017 - Type: FAA incident report (Accident/Incident Data System), as reported - Date: August 8, 2017, 07:21 local time - Place: Prescott, AZ - Airport: Prescott - Damage: Minor damage - Phase of flight: Takeoff: Rotation - Operating rules: Pilot school (Part 141) - Location: 34.5400° N, 112.4685° W: Placed by OpenAirDocs: center of Prescott, AZ, within about 6 miles (OpenAirDocs) - Nearby events: https://openairdocs.org/map.md?lat=34.5400&lon=-112.4685&mi=10 - Aircraft: N591ER, registered now (https://openairdocs.org/aircraft/N591ER) (OpenAirDocs) - Registry model: Diamond Aircraft Ind DA 42 (registry code 2990004, https://openairdocs.org/model/diamond-aircraft-ind-da-42) (OpenAirDocs) - Registry engine: Austro E4 series (registry code 06400, https://openairdocs.org/engine/austro-e4-series) (OpenAirDocs) - Reported make and model: DIAMOND AIRCRAFT IND GMBH DA 42 - Reported engine: AUSTRO E4 - People aboard: 2 - Fatal injuries: 0 - Other injuries: 0 - Pilot certificates: Commercial pilot, flight instructor, private pilot - Pilot flight hours: 2,136 total, 790 in this make and model, 120 in the last 90 days - FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/) - Page: https://openairdocs.org/incident/20170808016989I ## Narrative As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^. DURING SHORT FIELD TAKEOFF ROLL AT ABOUT 70-72 KNOTS, JUST BEFORE THE ROTATION SPEED OF 76 KNOTS THERE WAS AN AURAL WARNING AND A YELLOW ECU CAUTION INDICATION FOR THE LEFT ENGINE. THE MULTIENGINE STUDENT MANIPULATING THE CONTROLS POINTED TO THE YELLOW CAUTION INDICATION OF ECU WITH HER RIGHT HAND INDEX FINGER AND LOOKED THAT THE CFI. THE STUDENT SAID THAT THIS LOOK EXCHANGE INDICATED AN UNDERSTANDING THAT THE TAKEOFF SHOULD CONTINUE. INITIAL INTERVIEWS WITH CFI, STUDENT AND MAINTENANCE PERSONNEL CONFIRMED THAT THE ECU INDICATION WAS CAUTIONARY AND NOT A REASON TO ABORT BASED UPON PAST PRACTICES OR EXISTING POLICIES AND PROCEDURES. A MOMENT LATER THERE WAS A MINOR OR SLIGHT YAW TO THE LEFT, THE CAUSE OF WHICH HAS NOT BEEN DETERMINED. ECU DOWNLOAD SHOWED LEFT ENGINE BOOST WAS AT UPPER LIMIT, WHICH IF IT HAD CAUSED A YAW IT WOULD HAVE BEEN SLIGHT AND TO THE RIGHT. BOTH STUDENT AND INSTRUCTOR SAID THAT THEY DID NOT LOOK AT THE ENGINE INSTRUMENTS WHEN THEY NOTICED THE YAW. THE CFI SAID THAT THIS YAW CAUSED HIM TO IMMEDIATELY COMMANDEER THE CONTROL OF THE AIRCRAFT AND ABORT THE TAKEOFF. THE STUDENT REPORTED THAT INSTRUCTOR ALSO RETRACTED THE FLAPS AT THIS POINT. THE STUDENT DID NOT RECALL HEARING THE COMMAND I GOT CONTROLS. THE STUDENT REMEMBERS SAYING ABORT, ABORT, ABORT, RIGHT AFTER THE INSTRUCTOR TOOK THE CONTROLS. THIS IS TAUGHT TO BE THE RESPONSIBILITY OF THE PILOT FLYING THE AIRPLANE, WHICH AT THIS POINT WOULD HAVE BEEN THE INSTRUCTOR. A FEW SECONDS AFTER THE INSTRUCTOR COMMANDEERED THE CONTROLS THERE WAS AN ABRUPT YAW TO THE LEFT AND THE AIRCRAFT DEPARTED THE RUNWAY. THE SKID MARK ON THE RUNWAY LEFT BY THE LEFT TIRE WAS STRAIGHT UNTIL THE TIRE BLEW. THE DAMAGE TO THE AIRCRAFT CONSISTED OF A BLOWN LEFT TIRE AND A BROKEN GEAR DOOR LINKAGE. THE DAMAGE TO THE TIRE WAS CONSISTENT WITH THE BRAKE STOPPING ROTATION OF THE TIRE. NEITHER PILOT REMEMBERS APPLYING THE BRAKES. THE TOWER REPORTED THAT APPROXIMATELY 1000' DOWN THE RUNWAY THE AIRCRAFT'S LEFT TIRE APPEARED TO LOCK UP FOR SEVERAL HUNDRED FEET BEFORE THE AIRCRAFT VEERED TO THE LEFT AND OFF THE RUNWAY. DISCUSSING THE EVENT WITH THE STUDENT AND THE INSTRUCTOR, NEITHER OF WHICH REMEMBERS APPLYING THE LEFT BRAK, IT WAS AGREED THAT THE MOST LIKELY SCENARIO WAS THAT THE ABRUPT TRANSFER OF CONTROL RESULTED IN THE RIGHT RUDDER INPUT BY THE INSTRUCTOR WHICH CORRECTED THE LEFT YAW, RAISED THE STUDENTS LEFT RUDDER PEDDLE INTO THE STUDENTS FOOT, WHICH APPLIED THE LEFT BRAKE. ## Other reports on N591ER (1) Matched to the same aircraft by N-number and date. - [Incident 20181026020879I](https://openairdocs.org/incident/20181026020879I), Oct 26, 2018: Diamond Aircraft Ind Gmbh DA 42 (N591ER), Prescott, AZ, Minor damage. On 26 October 2018 at around 1119 MST; 1819 zulu time, at DA-42 Diamond, N591ER aborted a departure takeoff at Ernest Love field (prc) in Prescott, Arizona. As… From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record. --- 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.