# NTSB CHI97LA011: Aero Commander 685, N58RG, Eden, WI, October 19, 1996 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Limited investigation · Final report - Date: October 19, 1996, 17:00 local (22:00 UTC) - Place: Eden, WI - Coordinates: 43.68906, -88.359657 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=43.6891&lon=-88.3597&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Highest injury: Serious injuries - Injuries: 1 serious - Status: Completed, report August 25, 1997 - Report: Approved by Office Director - NTSB case key (mKey): 10480 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI97LA011 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/10480/pdf - Page: https://openairdocs.org/ntsb/CHI97LA011 ## Probable cause a partial loss of engine power due to improper adjustment of the fuel pump by an unqualified person (pilot-in-command) and the pilot's inadequate preflight planning which resulted in his selection of unsuitable terrain for the attempted takeoff. The pilot's failure to maintain directional control of the airplane and the trees were factors. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power(partial) - mech failure/malf, takeoff - initial climb - 1 engine - fuel system,pump - pressure too low (cause) - maintenance,adjustment - improper, pilot in command (cause) - Loss of control - in flight, takeoff - initial climb - preflight planning/preparation - inadequate, pilot in command (cause) - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause) - directional control - not maintained, pilot in command (contributing factor) - object - tree(s) (contributing factor) - stall - inadvertent, pilot in command - In flight collision with terrain/water, descent - uncontrolled ## Analysis Prior to takeoff from a private turf airstrip (1400'x 90'), the pilot adjusted the left engine's fuel pump. On takeoff roll the left engine began surging. The pilot continued the takeoff. The pilot lifted off at approximately 1000' and pulled back on the yoke to get over the trees on the left side of the airstrip. The airplane drifted to the left. The pilot said he stalled the airplane and should have pushed the yoke forward to gain airspeed. The Pilot Operating Handbook indicted a takeoff roll of approximately 2,500 feet was needed on a dry paved surface. ## Factual narrative On October 19, 1996, at 1700 central daylight time, an Aero Commander 685, N58RG, piloted by a private pilot, was destroyed during a collision with terrain, shortly after takeoff from a private airstrip (1400' X 90' dry/turf) in Eden, Wisconsin. A witness said he heard one of the engines sputter. The airplane then entered a left bank prior to impact. The private pilot reported serious injuries. The 14 CFR Part 91 flight was not operating on a flight plan. Visual meteorological conditions prevailed at the time of the accident. The flight departed a private airstrip in Eden, Wisconsin, at 1700 cdt. According to the pilot's written statement, he departed his private airstrip and indicated he lost boost or RPM on the left engine shortly after liftoff. The pilot applied right rudder but the airplane continued to the left. The left wing struck a tree approximately 20 feet high. The airplane started to roll towards the left and impacted the ground with the left wing first and cartwheeled. The pilot reported that both engines were running after impact and had to be shut down. According to the pilot's written statement to the FAA, he stated that on the day of the accident he noticed fuel flow was not reaching a minimum 290 lbs/hr on the left engine. The pilot, who is not an A&P mechanic, adjusted the fuel pump by-pass to achieve minimum requirements. On takeoff, the pilot stated that the left engine seemed like it lost boost pressure for a second and came right back. This happened twice on takeoff roll. The pilot stated, "At decision point, 1100', I [pilot] elected to take off. I [pilot] recall engine losing a little power again and was unable to totally correct for the drift to the left. Thus striking the top of the trees, resulting in forced landing in the neighbor's field." On December 3, 1996, during a telephone interview conducted by the IIC with the pilot, he said, "...I [pilot] pulled back too much on the yoke and stalled the airplane trying to get over the trees on the left side... ." "...I [pilot] should have push the yoke forward instead, to gain my airspeed back... ." The IIC calculated the takeoff roll using the Pilot's Operating Handbook (POH), to be 2,500 feet needed on a dry paved runway. The POH dos not have any performance charts for turf runway conditions. The left engine turbocharger and the related systems were tested by Allied Signal Aerospace under the supervision of a NTSB Investigator. Examination of the turbocharger revealed corrosion on the turbine side. The internal squirt hole that directs oil to the turbine end of the center housing for cooling was plugged shut with a coke and corrosion like material. The compressor end of the turbine shaft had a bead blasted finish. The controller, pressure relief valve, and poppet type wastegate were tested, and found to be acceptable. Nothing was found, that would preclude operation of the turbocharger and components prior to impact. ## Aircraft - Registration: [N58RG](https://openairdocs.org/deregistered/N58RG-1998-04-02), registration cancelled 1998-04-02, S/N 12047 (OpenAirDocs) - Reported make and model: Aero Commander 685 - Registry model: [Aero Commander 685](https://openairdocs.org/model/aero-commander-685) (registry code 0141612) (OpenAirDocs) - Category: Airplane - Serial number: 12047 - Engines: Continental GTSIO-520 435 horsepower reciprocating - Damage: Destroyed - Flight: Personal, Part 91 - Registered owner: Glenn Allen Kranig - Airworthiness certificate: Standard, Normal - Airport: PVT, Northridge Airstrip, runway 32, 1,400 × 90 ft, grass/turf ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 42; private; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 993 total, 5 in this make and model, 941 as pilot in command, 34 in the last 90 days, 6 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 150° at 13 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 61 °F, dew point 30 °F - Altimeter: 29.00 inHg - Observed at: MSN, 71 nm away ## 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 19961019033179A](https://openairdocs.org/incident/19961019033179A), Oct 19, 1996: Gulstm 685, Eden, WI, Destroyed. Departed private strip, got airborne and lost power, crashed in a field. (.4)prior to takeoff from a private turf airstrip (1400'X 90'), the pilot adjusted the… 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.