# NTSB CHI06FA206: Grumman TBM-3, N420GP, Oshkosh, WI, July 30, 2006 - Type: NTSB accident investigation - Classification: Accident · Fatal · Field investigation · Final report - Date: July 30, 2006, 12:07 local (17:07 UTC) - Place: Oshkosh, WI - Coordinates: 43.984165, -88.556945 - Nearby events: https://openairdocs.org/map.md?lat=43.9842&lon=-88.5569&mi=10 - Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping) - Highest injury: Fatal - Injuries: 1 fatal, 3 uninjured - Status: Completed, report July 25, 2007 - Report: Approved by Office Director - Parties: FAA-Milwaukee FSDO, EAA, EAA Warbirds o America - NTSB case key (mKey): 64225 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI06FA206 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/64225/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=64225 - Page: https://openairdocs.org/ntsb/CHI06FA206 ## Probable cause (aircraft 2) The Avenger pilot's visual lookout was inadequate and he failed to maintain clearance from the RV-6. Contributing factors were the Avenger's restricted visibility and the RV-6. ## Probable cause (aircraft 1) The Avenger pilot's visual lookout was indequate and he failed to maintain clearance from the RV-6. Contributing factors were the Avenger's restricted visibility and the RV-6. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - On ground/water collision with object, taxi - visual lookout - inadequate, pilot in command (cause) - clearance - not maintained, pilot in command (cause) - visual lookout - restricted (contributing factor) - object - aircraft moving on ground (contributing factor) - airport facilities,taxiway condition - narrow - On ground/water collision with object, taxi - visual lookout - inadequate, pilot of other aircraft (cause) - clearance - not maintained, pilot of other aircraft (cause) - visual lookout - restricted (contributing factor) - object - aircraft moving on ground (contributing factor) - airport facilities,taxiway condition - narrow ## Analysis (aircraft 2) An amateur-built RV-6 sustained substantial damage when a Grumman TBM-3, Avenger, taxied into the empennage and fuselage of the RV-6. Both aircraft were taxiing for takeoff on Papa taxiway (35 feet wide, ashphalt), which paralleled runway 18 at the Wittman Regional Airport (OSH), Oshkosh, Wisconsin. The accident occurred during the EAA AirVenture 2006 air show. The RV-6 pilot reported that he taxied forward on the P-1 taxiway and was directed by the volunteer flag person to taxi south on Papa taxiway. He reported that he was taxiing behind a green and white, high wing airplane that had TUNDRA painted on the top of the wing. The Avenger pilot reported he taxied the Avenger south from the warbird parking area toward the P-1 taxiway. He observed the flag person clear him to begin taxiing on Papa taxiway. The Avenger pilot reported that the airplane in front of him was a green and white, high wing airplane with TUNDRA written on top of the wing. He reported that he taxied at a very slow speed with the propeller speed set about 800 RPM. He reported that the Avenger had no mechanical defects and that the brakes were good. The Avenger pilot reported that he observed the Tundra pilot taxi off the right side of the taxiway for some unknown reason. The Avenger pilot reported that he spotted the airplane that was in front of the Tundra airplane, and he stated that he had "100 yards of free pavement" in front of the Avenger. The Avenger pilot reported that when he heard the impact and saw debris flying, he shut down the engine. He reported that he never saw the airplane that he hit while he was taxiing. Witnesses reported that the Avenger pilot did not make any "S-turns" while taxiing. The distance traveled by the Avenger from the intersection of the P1 taxiway and Papa taxiway to the impact point was about 1,180 feet. The relative speed between the Avenger and RV-6 at impact was calculated to be approximately 6.9 knots. A visibility study of the Avenger and RV-6 was conducted. The visibility study indicated that an "Area of No Visibility" extended from the Avenger's pilot position out to approximately 170 feet. No part of the RV-6 was visible to the Avenger pilot until it was positioned approximately 170 feet from the pilot in the Avenger. CAD drawings used in the visibility study demonstrated the following results if an "S-Turn" of 10 degrees was performed on the taxiway: With a turn of 10 degrees, the wing of the RV-6 was visible all the way to the area of impact, and the airplane was never wholly within the Area of No Visibility. A second visibility study was conducted and it confirmed that portions of the RV-6 could be seen from the cockpit of the Avenger all the way to the area of impact when the Avenger was angled 10-degrees from the taxiway centerline. The Airplane Flying Handbook states the following about taxiing a tailwheel-equipped airplane: "Since a tailwheel-type airplane rests on the tailwheel as well as the main landing wheels, it assumes a nose-high attitude when on the ground. In most cases this places the engine cowling high enough to restrict the pilot's vision of the area directly ahead of the airplane. Consequently, objects directly ahead of the airplane are difficult, if not impossible, to see. To observe and avoid colliding with any objects or hazardous surface conditions, the pilot should alternately turn the nose from one side to the other-that is zigzag, or make a series of short S-turns while taxiing forward. This should be done slowly, smoothly, positively, and cautiously." ## Analysis (aircraft 1) A Grumman TBM-3, Avenger, sustained minor damage when it taxied into the empennage and fuselage of an amateur-built RV-6. Both aircraft were taxiing for takeoff on Papa taxiway (35 feet wide, ashphalt), which paralleled runway 18 at the Wittman Regional Airport (OSH), Oshkosh, Wisconsin. The accident occurred during the EAA AirVenture 2006 air show. The RV-6 pilot reported that he taxied forward on the P-1 taxiway and was directed by the volunteer flag person to taxi south on Papa taxiway. He reported that he was taxiing behind a green and white, high wing airplane that had TUNDRA painted on the top of the wing. The Avenger pilot reported he taxied the Avenger south from the warbird parking area toward the P-1 taxiway. He observed the flag person clear him to begin taxiing on Papa taxiway. The Avenger pilot reported that the airplane in front of him was a green and white, high wing airplane with TUNDRA written on top of the wing. He reported that he taxied at a very slow speed with the propeller speed set about 800 RPM. He reported that the Avenger had no mechanical defects and that the brakes were good. The Avenger pilot reported that he observed the Tundra pilot taxi off the right side of the taxiway for some unknown reason. The Avenger pilot reported that he spotted the airplane that was in front of the Tundra airplane, and he stated that he had "100 yards of free pavement" in front of the Avenger. The Avenger pilot reported that when he heard the impact and saw debris flying, he shut down the engine. He reported that he never saw the airplane that he hit while he was taxiing. Witnesses reported that the Avenger pilot did not make any "S-turns" while taxiing. The distance traveled by the Avenger from the intersection of the P1 taxiway and Papa taxiway to the impact point was about 1,180 feet. The relative speed between the Avenger and RV-6 at impact was calculated to be approximately 6.9 knots. A visibility study of the Avenger and RV-6 was conducted. The visibility study indicated that an "Area of No Visibility" extended from the Avenger's pilot position out to approximately 170 feet. No part of the RV-6 was visible to the Avenger pilot until it was positioned approximately 170 feet from the pilot in the Avenger. CAD drawings used in the visibility study demonstrated the following results if an "S-Turn" of 10 degrees was performed on the taxiway: With a turn of 10 degrees, the wing of the RV-6 was visible all the way to the area of impact, and the airplane was never wholly within the Area of No Visibility. A second visibility study was conducted and it confirmed that portions of the RV-6 could be seen from the cockpit of the Avenger all the way to the area of impact when the Avenger was angled 10-degrees from the taxiway centerline. The Airplane Flying Handbook states the following about taxiing a tailwheel-equipped airplane: "Since a tailwheel-type airplane rests on the tailwheel as well as the main landing wheels, it assumes a nose-high attitude when on the ground. In most cases this places the engine cowling high enough to restrict the pilot's vision of the area directly ahead of the airplane. Consequently, objects directly ahead of the airplane are difficult, if not impossible, to see. To observe and avoid colliding with any objects or hazardous surface conditions, the pilot should alternately turn the nose from one side to the other-that is zigzag, or make a series of short S-turns while taxiing forward. This should be done slowly, smoothly, positively, and cautiously." ## Factual narrative (aircraft 2) HISTORY OF FLIGHT On July 30, 2006, at 1207 central daylight time, an amateur-built Vans RV-6, C-FNQP, sustained substantial damage when a Grumman TBM-3, Avenger, N420GP, operated by the Tri-State Warbird Museum, taxied into the empennage and fuselage of the RV-6. Both aircraft were taxiing for takeoff on Papa taxiway, which parallels runway 18 at the Wittman Regional Airport (OSH), Oshkosh, Wisconsin. The passenger seated in the right seat of the RV-6 received fatal injuries. The RV-6 pilot and the pilot and passenger of the Avenger were not injured. Visual meteorological conditions prevailed at the time of the accident. The pilots and passengers of both aircraft had attended the EAA AirVenture 2006 air show and were departing OSH. The Avenger's destination was Clermont County Airport, Batavia, Ohio, and no flight plan was filed. The RV-6's destination was Gore Bay, Ontario, Canada, and the pilot had filed a visual flight rules (VFR) flight plan. The RV-6 pilot reported that the RV-6 was parked on row 301 of the homebuilt aircraft parking area that was located just south of the P-1 taxiway. The RV-6 pilot reported that the airplane was pushed onto the P-1 taxiway before he started his engine. He taxied forward on the P-1 taxiway and was directed by the flag person to taxi south on Papa taxiway. He reported that he was taxiing behind a green and white, high wing airplane that had TUNDRA painted on the top of the wing. He reported that a gray airplane was in front of the Tundra aircraft. The RV-6 pilot reported that he "didn't know the TBM was behind" his airplane. The RV-6 pilot reported that he was not sure if he was taxiing forward or if he was stopped when the Avenger struck the RV-6 from behind. The Avenger pilot reported that the Avenger was parked in the Warbird parking area located at the north end of the air show display area. The Avenger pilot started the engine and let the engine warm up for about five minutes before he began to taxi. He taxied the airplane south toward the P-1 taxiway. He observed the flag person clear him to begin taxiing on Papa taxiway. The Avenger pilot reported that the airplane in front of the Avenger was a green and white, high wing airplane with TUNDRA written on top of the wing. He reported that he taxied at a very slow speed with the propeller speed set about 800 RPM. He reported that the Avenger had no mechanical defects and that the brakes were good. He reported that the relatively narrow width of the taxiway prevented a large angular change from the taxiway centerline. He reported he made "shallow S-turns within the confines of the taxiway width." The Avenger pilot reported that he observed the Tundra pilot taxi off the right side of the taxiway for some unknown reason. The Avenger pilot reported that he spotted the airplane that was in front of the Tundra airplane, and he stated that he had "100 yards of free pavement" in front of the Avenger. The Avenger pilot reported that when he heard the impact and saw debris flying, he shut down the engine. He reported that he never saw the airplane that he hit while he was taxiing. The pilot of a Lancair airplane reported that he followed the Avenger while taxiing on Papa taxiway and he observed the Avenger taxi into the RV-6. The Lancair pilot reported that his airplane was parked in the homebuilt aircraft parking area near the Lancair airplane exhibit area located just south of the P-1 taxiway. He reported that about six aircraft marshallers helped push his Lancair into a position near the Papa taxiway so that he could start his engine. One of the aircraft marshallers motioned to him that he was cleared to taxi onto Papa taxiway. Instead, the Lancair pilot waited because the Avenger was approaching and he did not want to be in front of the Avenger while taxiing. After the Avenger passed, the Lancair pilot taxied onto Papa taxiway. He followed the Avenger at a distance so that he could remain clear of the Avenger's propeller blast. The Lancair pilot reported that it was "stop and go" traffic on the taxiway because of the number of airplanes taxiing for takeoff. The Lancair pilot reported that the Avenger pilot did not make any "S-turns" while taxiing, but instead, taxied straight ahead. The Lancair pilot reported that "all of a sudden" he observed black smoke and debris "flying everywhere" as the Avenger hit the RV-6. The Lancair pilot reported that there were no wing-walkers or aircraft marshallers next to the Avenger while it was taxiing on Papa taxiway. A witness reported that he observed the Avenger taxi from the Warbird parking area to the P-1 taxiway and on Papa taxiway. The witness reported that he was walking in the same direction as the Avenger was taxiing, so the witness was focused on watching the Avenger. The witness reported that the Avenger was moving "very slowly and deliberately." He reported that the Avenger did not make any S-turns while it taxied on Papa taxiway. He reported that there were no wing-walkers for the Avenger while it taxied on Papa taxiway. Another witness reported that she saw the Avenger do one S-turn while it was on Papa taxiway. She reported that she was observing airplanes taxi toward "Tower Road taxiway." She reported that there were about 8 - 10 airplanes, including a blue B-25 warbird, in front of the Avenger. She reported she observed the Avenger angled toward the side of the taxiway when it was "further down" the taxiway, but she did not know if the Avenger was doing S-turns at the time of the accident. The Experimental Aircraft Association's (EAA) video production team was doing a video shoot of the Papa taxiway as the dissimilar aircraft were taxiing south toward Tower Road taxiway where they turned toward the runway for a "mid-field departure." The video operator was located about 40 feet south of the Tower Road taxiway. The video indicated that numerous aircraft were in line on Papa taxiway at the Tower Road taxiway. The video showed that the aircraft in front of the Avenger, before the impact occurred, included the accident RV-6, a green and white high wing airplane (Tundra), a gray RV-6, a red and white Cessna 150, a Glasair, a RV-6, a L-39 jet, and a blue B-25 warbird. The video showed the Tundra in front of the accident RV-6 and just behind the gray RV-6. The video showed the Tundra taxiing off the right side of Papa taxiway. The video showed that after the Tundra taxied off the taxiway, the Avenger was in a slight turn to the right and then turned back to the centerline within about 17 seconds after the Tundra taxied off the taxiway. The Avenger impacted the RV-6 about 1 minute 21 seconds after the Tundra taxied off Papa taxiway. The Avenger was the fifth airplane from Tower Road taxiway at the time of the accident. The video indicated that the Avenger was taxiing straight ahead for about 9 - 10 seconds prior to the time of impact and was not making an S-turn. The video indicated that the Avenger pilot was looking forward over the nose of the Avenger as it was taxiing forward prior to impact with the RV-6. The length of Papa taxiway from the P-1 taxiway to the Tower Road taxiway is 1,500 feet. The accident occurred about 320 feet north of the Tower Road taxiway. The width of the taxiway is 35 feet. PERSONNEL INFORMATION The Avenger pilot held a commercial pilot certificate with single-engine land, glider, and airplane instrument ratings. He had about 2,500 hours of total flight time with 16 hours in the TBM Avenger. The pilot reported that he had flight experience in numerous "warbird" aircraft that included about 1,400 hours in the T-6, 60 hours in the P-51, and 70 hours in Stearman airplanes. He held a second-class medical certificate. The RV-6 pilot held a private pilot's certificate with a single-engine land rating. He had about 543 hours of total flight time with 24 hours in a RV-6. He held a third-class ## Factual narrative (aircraft 1) HISTORY OF FLIGHT On July 30, 2006, at 1207 central daylight time, a Grumman TBM-3, Avenger, N420GP, operated by the Tri-State Warbird Museum, sustained minor damage when it taxied into the empennage and fuselage of an amateur-built Vans RV-6, C-FNQP. Both aircraft were taxiing for takeoff on Papa taxiway, which parallels runway 18 at the Wittman Regional Airport (OSH), Oshkosh, Wisconsin. The passenger seated in the right seat of the RV-6 received fatal injuries. The RV-6 pilot and the pilot and passenger of the Avenger were not injured. Visual meteorological conditions prevailed at the time of the accident. The pilots and passengers of both aircraft had attended the EAA AirVenture 2006 air show and were departing OSH. The Avenger's destination was Clermont County Airport, Batavia, Ohio, and no flight plan was filed. The RV-6's destination was Gore Bay, Ontario, Canada, and the pilot had filed a visual flight rules (VFR) flight plan. The RV-6 pilot reported that the RV-6 was parked on row 301 of the homebuilt aircraft parking area that was located just south of the P-1 taxiway. The RV-6 pilot reported that the airplane was pushed onto the P-1 taxiway before he started his engine. He taxied forward on the P-1 taxiway and was directed by the flag person to taxi south on Papa taxiway. He reported that he was taxiing behind a green and white, high wing airplane that had TUNDRA painted on the top of the wing. He reported that a gray airplane was in front of the Tundra aircraft. The RV-6 pilot reported that he "didn't know the TBM was behind" his airplane. The RV-6 pilot reported that he was not sure if he was taxiing forward or if he was stopped when the Avenger struck the RV-6 from behind. The Avenger pilot reported that the Avenger was parked in the Warbird parking area located at the north end of the air show display area. The Avenger pilot started the engine and let the engine warm up for about five minutes before he began to taxi. He taxied the airplane south toward the P-1 taxiway. He observed the flag person clear him to begin taxiing on Papa taxiway. The Avenger pilot reported that the airplane in front of the Avenger was a green and white, high wing airplane with TUNDRA written on top of the wing. He reported that he taxied at a very slow speed with the propeller speed set about 800 RPM. He reported that the Avenger had no mechanical defects and that the brakes were good. He reported that the relatively narrow width of the taxiway prevented a large angular change from the taxiway centerline. He reported he made "shallow S-turns within the confines of the taxiway width." The Avenger pilot reported that he observed the Tundra pilot taxi off the right side of the taxiway for some unknown reason. The Avenger pilot reported that he spotted the airplane that was in front of the Tundra airplane, and he stated that he had "100 yards of free pavement" in front of the Avenger. The Avenger pilot reported that when he heard the impact and saw debris flying, he shut down the engine. He reported that he never saw the airplane that he hit while he was taxiing. The pilot of a Lancair airplane reported that he followed the Avenger while taxiing on Papa taxiway and he observed the Avenger taxi into the RV-6. The Lancair pilot reported that his airplane was parked in the homebuilt aircraft parking area near the Lancair airplane exhibit area located just south of the P-1 taxiway. He reported that about six aircraft marshallers helped push his Lancair into a position near the Papa taxiway so that he could start his engine. One of the aircraft marshallers motioned to him that he was cleared to taxi onto Papa taxiway. Instead, the Lancair pilot waited because the Avenger was approaching and he did not want to be in front of the Avenger while taxiing. After the Avenger passed, the Lancair pilot taxied onto Papa taxiway. He followed the Avenger at a distance so that he could remain clear of the Avenger's propeller blast. The Lancair pilot reported that it was "stop and go" traffic on the taxiway because of the number of airplanes taxiing for takeoff. The Lancair pilot reported that the Avenger pilot did not make any "S-turns" while taxiing, but instead, taxied straight ahead. The Lancair pilot reported that "all of a sudden" he observed black smoke and debris "flying everywhere" as the Avenger hit the RV-6. The Lancair pilot reported that there were no wing-walkers or aircraft marshallers next to the Avenger while it was taxiing on Papa taxiway. A witness reported that he observed the Avenger taxi from the Warbird parking area to the P-1 taxiway and on Papa taxiway. The witness reported that he was walking in the same direction as the Avenger was taxiing, so the witness was focused on watching the Avenger. The witness reported that the Avenger was moving "very slowly and deliberately." He reported that the Avenger did not make any S-turns while it taxied on Papa taxiway. He reported that there were no wing-walkers for the Avenger while it taxied on Papa taxiway. Another witness reported that she saw the Avenger do one S-turn while it was on Papa taxiway. She reported that she was observing airplanes taxi toward "Tower Road taxiway." She reported that there were about 8 - 10 airplanes, including a blue B-25 warbird, in front of the Avenger. She reported she observed the Avenger angled toward the side of the taxiway when it was "further down" the taxiway, but she did not know if the Avenger was doing S-turns at the time of the accident. The Experimental Aircraft Association's (EAA) video production team was doing a video shoot of the Papa taxiway as the dissimilar aircraft were taxiing south toward Tower Road taxiway where they turned toward the runway for a "mid-field departure." The video operator was located about 40 feet south of the Tower Road taxiway. The video indicated that numerous aircraft were in line on Papa taxiway at the Tower Road taxiway. The video showed that the aircraft in front of the Avenger, before the impact occurred, included the accident RV-6, a green and white high wing airplane (Tundra), a gray RV-6, a red and white Cessna 150, a Glasair, a RV-6, a L-39 jet, and a blue B-25 warbird. The video showed the Tundra in front of the accident RV-6 and just behind the gray RV-6. The video showed the Tundra taxiing off the right side of Papa taxiway. The video showed that after the Tundra taxied off the taxiway, the Avenger was in a slight turn to the right and then turned back to the centerline within about 17 seconds after the Tundra taxied off the taxiway. The Avenger impacted the RV-6 about 1 minute 21 seconds after the Tundra taxied off Papa taxiway. The Avenger was the fifth airplane from Tower Road taxiway at the time of the accident. The video indicated that the Avenger was taxiing straight ahead for about 9 - 10 seconds prior to the time of impact and was not making an S-turn. The video indicated that the Avenger pilot was looking forward over the nose of the Avenger as it was taxiing forward prior to impact with the RV-6. The length of Papa taxiway from the P-1 taxiway to the Tower Road taxiway is 1,500 feet. The accident occurred about 320 feet north of the Tower Road taxiway. The width of the taxiway is 35 feet. PERSONNEL INFORMATION The Avenger pilot held a commercial pilot certificate with single-engine land, glider, and airplane instrument ratings. He had about 2,500 hours of total flight time with 16 hours in the TBM Avenger. The pilot reported that he had flight experience in numerous "warbird" aircraft that included about 1,400 hours in the T-6, 60 hours in the P-51, and 70 hours in Stearman airplanes. He held a second-class medical certificate. The RV-6 pilot held a private pilot's certificate with a single-engine land rating. He had about 543 hours of total flight time with 24 hours in a RV-6. He held a third-class medical cert ## Aircraft 1 - Registration: [N420GP](https://openairdocs.org/aircraft/N420GP), registered now, S/N 53420, built 1944 (OpenAirDocs) - Reported make and model: Grumman TBM-3 - Registry model: [Grumman TBM-3](https://openairdocs.org/model/grumman-tbm-3) (registry code 3950308) (OpenAirDocs) - Registry engine: [Wright R-2600 series](https://openairdocs.org/engine/wright-r-2600-series) (registry code 67050, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 53420 - Airframe hours: 4843 - Engines: Wright R02600-20 1900 horsepower reciprocating - Damage: Minor damage - Flight: Personal, Part 91 - Registered owner: Tri-State Warbird Museum - Airworthiness certificate: Special, Limited (Special) - Last inspection: Annual, August 1, 2005 - Departed: OSH, Oshkosh, WI - Destination: I69, Batavia, OH - Airport: OSH, Whitman Regional Airport ## Aircraft 2 - Registration: C-FNQP (not matched to a registry record) - Reported make and model: Vans Aircraft RV-6 - Category: Airplane, amateur-built - Airframe hours: 3 - Engines: Lycoming O-320-B2A 160 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Donald W Reed - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Annual, May 1, 2006 - Departed: OSH, Oshkosh, WI - Destination: CYZE, Gore Bay - Flight plan: VFR - Airport: OSH, Whitman Regional Airport ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot, aircraft N420GP; age 45; injuries: none; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review July 1, 2006; seat: front; flight hours: 2,400 total, 16 in this make and model, 2,250 as pilot in command, 55 in the last 90 days, 5 in the last 30 days, 1 in the last 24 hours - Pilot, aircraft 2; age 59; injuries: none; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; seat: left; flight hours: 543 total, 24 in this make and model, 390 as pilot in command, 36 in the last 90 days, 18 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 160° at 8 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 73 °F, dew point 68 °F - Altimeter: 29.84 inHg - Observed at: OSH ## 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 20060730026731A](https://openairdocs.org/incident/20060730026731A), Jul 30, 2006: Grumav TBM3AIRTRD, Oshkosh, WI, Minor damage. (-23) On 30 July 2006 at Oshkosh, WI (osh) TBM-3, N420GP, piloted by [privacy data omitted] redlich, taxied inadvertently into the aft portion of a RV-6,… ## Other investigations on N420GP (1) 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. - [NTSB CEN25LA181](https://openairdocs.org/ntsb/CEN25LA181), May 15, 2025: Grumman TBM-3 (N420GP), Terre Haute, IN, substantial damage, investigation ongoing ## Docket (27 files) The files NTSB released with the investigation on July 19, 2007, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=64225. 44.1 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (N420GP) (item 1, .PDF, 398 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279908&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1%20(N420GP)-Master.PDF - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (C-FNQP) (item 2, .PDF, 364 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279909&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1%20(C-FNQP)-Master.PDF - Witness Statements & Record of Interviews (item 3, .PDF, 396 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279910&FileExtension=.PDF&FileName=Witness%20Statements%20%26%20Record%20of%20Interviews-Master.PDF - FAA Report (item 4, .PDF, 370 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40435296&FileExtension=.PDF&FileName=FAA%20Report-Redacted.PDF - Winnebago County Sheriff's Report (item 5, .PDF, 498 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279914&FileExtension=.PDF&FileName=Winnebago%20County%20Sheriff%27s%20Report-Master.PDF - Propeller Strike & Propeller RPM Calculation (item 6, .PDF, 79 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279916&FileExtension=.PDF&FileName=Propeller%20Strike%20%26%20Propeller%20RPM%20Calculation-Master.PDF - TBM/RV-6 Visibility Study (item 7, .PDF, 27.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279918&FileExtension=.PDF&FileName=TBM%2FRV-6%20Visibility%20Study-Master.PDF - Information on Power Point Presentation (item 8, .PDF, 20 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40289404&FileExtension=.PDF&FileName=Information%20on%20Power%20Point%20Presentation-Master.PDF - CAD Drawing of TBM/RV-6 Taxi Visibility (item 9, .PDF, 766 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279927&FileExtension=.PDF&FileName=CAD%20Drawing%20of%20TBM%2FRV-6%20Taxi%20Visibility-Master.PDF - Second Visibility Study Conducted on Feb 21, 2007 (item 10, .PDF, 153 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279929&FileExtension=.PDF&FileName=Second%20Visibility%20Study%20Conducted%20on%20Feb%2021,%202007-Master.PDF - FAA Oshkosh NOTAM (item 11, .PDF, 2.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279933&FileExtension=.PDF&FileName=FAA%20Oshkosh%20NOTAM-Master.PDF - EAA Website ATC Information (item 12, .PDF, 2.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279936&FileExtension=.PDF&FileName=EAA%20Website%20ATC%20Information-Master.PDF - EAA Custom Parking (item 13, .PDF, 6.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279937&FileExtension=.PDF&FileName=EAA%20Custom%20Parking-Master.PDF - Diagrams of Taxiways and Flagmen Positions (item 14, .PDF, 772 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279939&FileExtension=.PDF&FileName=Diagrams%20of%20Taxiways%20and%20Flagmen%20Positions-Master.PDF - Diagrams of TBM & RV-6 (item 15, .PDF, 86 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279940&FileExtension=.PDF&FileName=Diagrams%20of%20TBM%20%26%20RV-6-Master.PDF - Airplane Flying Handbook, Chapter 13 (item 16, .PDF, 246 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279941&FileExtension=.PDF&FileName=Airplane%20Flying%20Handbook,%20Chapter%2013-Master.PDF - Accident Video Information (item 17, .PDF, 12 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279942&FileExtension=.PDF&FileName=Accident%20Video%20Information-Master.PDF - Statement of Party Representatives to NTSB Investigation (item 18, .PDF, 221 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279943&FileExtension=.PDF&FileName=Statement%20of%20Party%20Representatives%20to%20NTSB%20Investigation-Master.PDF - Photo 1. View of Aircraft Soon After Impact (item 19, .PDF, 331 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279944&FileExtension=.PDF&FileName=Photo%201.%20%20View%20of%20Aircraft%20Soon%20After%20Impact-Master.PDF - Photo 2. View of Accident From the Right Front of Airplanes (item 20, .PDF, 409 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279945&FileExtension=.PDF&FileName=Photo%202.%20%20View%20of%20Accident%20From%20the%20Right%20Front%20of%20Airplanes-Master.PDF - Photo 3. Photo Taken From the Lancair Behind the TBM (item 21, .PDF, 122 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279946&FileExtension=.PDF&FileName=Photo%203.%20%20Photo%20Taken%20From%20the%20Lancair%20Behind%20the%20TBM-Master.PDF - Photo 4. View From the Front of the RV-6 (item 22, .PDF, 63 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279947&FileExtension=.PDF&FileName=Photo%204.%20%20View%20From%20the%20Front%20of%20the%20RV-6-Master.PDF - Photo 5. Tail of the RV-6 (item 23, .PDF, 68 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279948&FileExtension=.PDF&FileName=Photo%205.%20%20Tail%20of%20the%20RV-6-Master.PDF - Photo 6. Tail of the RV-6 (item 24, .PDF, 68 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279949&FileExtension=.PDF&FileName=Photo%206.%20%20Tail%20of%20the%20RV-6-Master.PDF - Photo 7. View of Runway Centerline and Both Airplanes (item 25, .PDF, 73 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279950&FileExtension=.PDF&FileName=Photo%207.%20%20View%20of%20Runway%20Centerline%20and%20Both%20Airplanes-Master.PDF - Photo 8. Measurement of Propeller Slashes on Fuselage (item 26, .PDF, 61 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279951&FileExtension=.PDF&FileName=Photo%208.%20%20Measurement%20of%20Propeller%20Slashes%20on%20Fuselage-Master.PDF - Photo 9. Measurement of Propeller Slashes on Fuselage (item 27, .PDF, 62 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40279952&FileExtension=.PDF&FileName=Photo%209.%20%20Measurement%20of%20Propeller%20Slashes%20on%20Fuselage-Master.PDF 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.