# NTSB LAX94LA230: Piper PA-34-200, N4810T, Chino, CA, May 31, 1994 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: May 30, 1994, 20:21 local (May 31, 1994, 03:21 UTC) - Place: Chino, CA - Coordinates: 34.00064, -117.680793 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=34.0006&lon=-117.6808&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report December 7, 1994 - Report: Approved by Office Director - NTSB case key (mKey): 28752 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX94LA230 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/28752/pdf - Page: https://openairdocs.org/ntsb/LAX94LA230 ## Probable cause THE RIGHT ENGINE'S FAILURE FOR UNDETERMINED REASONS TO RESPOND TO THROTTLE COMMAND DURING A GO-AROUND ATTEMPT, AND BOTH PILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL OF THE AIRCRAFT. INADEQUATE SUPERVISION OF THE FLIGHT BY THE CFI IS ALSO CONSIDERED A CAUSE. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, go-around (vfr) - 1 engine - emergency procedure - simulated, pilot in command(cfi) - go-around - attempted, dual student - 1 engine - output low (cause) - reason for occurrence undetermined (cause) - directional control - not maintained, dual student (cause) - supervision - inadequate, pilot in command(cfi) (cause) - In flight collision with terrain/water, go-around (vfr) ## Analysis THE FLIGHT INSTRUCTOR REPORTED THAT HIS STUDENT WAS PERFORMING A PRACTICE SINGLE-ENGINE ILS APPROACH TO RUNWAY 26 WITH THE RIGHT ENGINE SET AT ZERO THRUST. THE AIRCRAFT WAS HIGH AND HAD DRIFTED OVER THE RIGHT EDGE OF THE RUNWAY WHEN THE INSTRUCTOR COMMANDED THE STUDENT TO GO-AROUND. ACCORDING TO THE INSTRUCTOR, THE STUDENT BROUGHT UP BOTH THROTTLES; HOWEVER, THE RIGHT ENGINE FAILED TO RESPOND. THE AIRCRAFT YAWED AND ROLLED TO THE RIGHT, THE RIGHT WING TIP STRUCK THE GROUND, AND THE AIRCRAFT CARTWHEELED TO A STOP. THE RIGHT ENGINE WAS REMOVED FROM THE AIRCRAFT AND EXAMINED BY A FAA CERTIFIED AIRFRAME AND POWER PLANT MECHANIC. NO DISCREPANCIES WERE NOTED DURING THE EXAMINATION. ## Factual narrative On May 30, 1994, at 2021 Pacific daylight time, a Piper PA34-200, N4810T, collided with the ground following a loss of control during a simulated single-engine approach and go-around at the Chino, California, airport. The aircraft was operated by Air Desert Pacific Corporation of La Verne, California, and was engaged in a local area instructional flight. Visual meteorological conditions prevailed at the time and no flight plan was filed for the operation. The aircraft incurred substantial damage. The certificated commercial pilot/flight instructor and the pilot under training for a multiengine class rating were not injured. The flight originated at the La Verne, California, airport on the day of the accident at 1830 as a local area instructional flight. In a telephone interview, the flight instructor reported that his student was performing a practice single-engine ILS approach to runway 26 with the right engine set at zero thrust. The aircraft was high and had drifted over the right edge of the runway when the instructor commanded the student to go-around. According to the instructor, the student brought up both throttles; however, the right engine failed to respond. The aircraft yawed and rolled to the right, the right wing tip struck the ground, and the aircraft cartwheeled to a stop. The right engine was removed from the aircraft and examined by a Federal Aviation Administration (FAA) certified airframe and power plant mechanic. The report of the examination is attached to this report. No discrepancies were noted during the examination. ## Aircraft - Registration: [N4810T](https://openairdocs.org/deregistered/N4810T-1997-02-24), registration cancelled 1997-02-24, S/N 347250151 (OpenAirDocs) - Reported make and model: PIPER PA-34-200 - Registry model: [Piper PA-34-200](https://openairdocs.org/model/piper-pa-34-200) (registry code 7103405) (OpenAirDocs) - Category: Airplane - Serial number: 34-7250151 - Airframe hours: 5810 - Engines: LYCOMING IO-360-C1E6 200 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Operator: Air Desert Pacific Corp. - Registered owner: Air Desert Pacific Corp. - Airworthiness certificate: Special, Restricted (Special); Standard, Normal - Last inspection: Annual, May 10, 1994 - Departed: POC, LA VERNE, CA - Destination: CNO - Flight plan: VFR/IFR - Airport: CNO, Chino, runway 26, 4,856 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 24; flight instructor, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: right; flight hours: 1,200 total, 100 in this make and model, 1,000 as pilot in command, 60 in the last 90 days, 45 in the last 30 days, 4 in the last 24 hours ## Weather - Conditions: Visual (VMC), Night/dark - Wind: 240° at 13 knots - Visibility: 10 statute miles - Lowest ceiling: 10,000 ft broken - Altimeter: 29.00 inHg - Observed at: CNO ## 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 19940530013119A](https://openairdocs.org/incident/19940530013119A), May 30, 1994: Piper PA34200, Chino, CA, Substantial damage. Practice engine out high right of runway. CFI advised go around. Right engine failed respond. Hit ground. Cartwheeled 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.