# NTSB ANC22FA069: Story Charles Brad TT FOX, N2723P, Wasilla, AK, August 29, 2022 - Type: NTSB accident investigation - Classification: Accident · Fatal · Class 3 · Field · Final report - Date: August 29, 2022, 12:04 local (20:04 UTC) - Place: Wasilla, AK · Residential area next to runway - Coordinates: 61.637625, -149.30054 - Nearby events: https://openairdocs.org/map.md?lat=61.6376&lon=-149.3005&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Defining event: [Approach-VFR pattern downwind: Unknown or undetermined](https://openairdocs.org/ntsb-events/000) - Highest injury: Fatal - Injuries: 1 fatal - Status: Completed - Report: Approved by Office Director - Investigation class: Class 3 - NTSB office: Alaska Regional Office - Parties: FAA - NTSB case key (mKey): 105826 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC22FA069 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/105826/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=105826 - Page: https://openairdocs.org/ntsb/ANC22FA069 ## Probable cause The pilot’s inability to maintain control of the airplane for reasons that could not be determined. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters](https://openairdocs.org/ntsb-findings/01062000): Aircraft › Aircraft oper/perf/capability · Attain/maintain not possible (probable cause); cases with it: [Story Charles Brad TT FOX, 1 case](https://openairdocs.org/ntsb-findings/01062000/cases.md?model=05640JT), [All aircraft, 1,269 cases](https://openairdocs.org/ntsb-findings/01062000/cases.md) - [Not determined](https://openairdocs.org/ntsb-findings/05000000): Not determined › Not determined · Unknown/Not determined (probable cause); cases with it: [Story Charles Brad TT FOX, 1 case](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=05640JT), [All aircraft, 2,247 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Approach-VFR pattern downwind: Unknown or undetermined](https://openairdocs.org/ntsb-events/000) (defining event); cases with it: [Story Charles Brad TT FOX, 1 case](https://openairdocs.org/ntsb-events/000/sequence.md?model=05640JT), [All aircraft, 1,703 cases](https://openairdocs.org/ntsb-events/000/sequence.md) - [Unknown: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Story Charles Brad TT FOX, 1 case](https://openairdocs.org/ntsb-events/470/sequence.md?model=05640JT), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis According to witnesses, the airplane took off on runway 08 and then turned back toward the airport. The pilot made a radio call that he was turning downwind for landing. The accident occurred during the fifth flight of the phase 1 test flights after the pilot finished building the airplane. Witnesses heard changes in the engine rpm they described as the engine revving, going to idle, and surging. They also reported that the airplane was traveling “fast,” with pitch oscillations; the airplane approached the gravel runway in a right-wing-low turn as if it was going to land. The airplane then pitched down abruptly before striking trees about 60 to 80 ft before penetrating the side of a hangar, where it came to rest. Data downloaded from an onboard device showed the airplane turned crosswind after takeoff then entered a right downwind for the runway. Once abeam the departure end of the runway, the airplane stopped its climb, began a descent, and turned toward the approach end of the intersecting gravel strip. The data also showed that the engine rpm changed from idle to maximum three times in the last 8 seconds of flight. Examination of the airplane revealed no mechanical malfunctions or anomalies that would have precluded normal operation. The reason for the rpm oscillations and pitch variations could not be determined with the available information. Given the witness statements and that the pilot was turning toward the gravel runway, it is likely that he was experiencing an issue with the airplane that could not be determined with the available information. ## Factual narrative The pilot had started building the airplane about 3 years before and finished a couple of weeks before the accident. The Federal Aviation Administration DAR-F Inspector completed a Conformity Inspection of the airplane on August 13, 2022. A Special Airworthiness Certificate was issued on August 13, 2022. When the airplane passed this inspection, the next step was that a pilot must fly between 25-40 hours of test flights in specific non-populated areas to make sure all components are operating properly. Only after that test flight time was completed could the pilot fly the airplane with passengers on board. The airplane was in the test flight stage with about 3.2 hours of flight time completed. On August 29, 2022, about 1204 Alaska Daylight Time, a Charles Brad Story TT FOX amateur-built airplane, N2723P sustained substantial damage when it was involved in an accident at the Wolf Lake Airport (4AK6), Wasilla, Alaska. The pilot was fatally injured. The airplane was operated by the pilot as a Title 14 Code of Federal Regulations Part 91 test flight. Family reported that the purpose of the flight was for the pilot to complete the required flight hours during the phase I testing of the amateur-built airplane. Witnesses at the airport observed the airplane departing to the south and then heard the airplane returning towards the airport. The pilot made a call on the radio saying he was on the downwind leg of the traffic pattern for landing; no other transmissions were heard from the airplane. The flight path downloaded from an onboard Dynon Skyview D1000 showed the airplane turned crosswind after takeoff then entered a right downwind for runway 08. Once abeam the departure end of the runway, the airplane stopped its climb, began a descent, and turned toward the approach end of the gravel strip, runway 02. (Figure1) Witnesses then observed the airplane flying low and fast, heading toward the gravel strip. Witnesses reported hearing changes in the engine rpm which were described as the engine revving, going to idle, and surging. They also reported the airplane was traveling “fast,” with two witnesses reporting pitch oscillations. A witness saw the airplane “abruptly pitch down as if the airplane hit something “and impacted the hangar. Figure 1. Flight path data from the Dynon Skyview. The yellow path indicates the flight track of the accident airplane. The pilot was the owner and builder of the airplane. The pilot had completed 4 test flights in this airplane starting on August 21. The first and second flights were logged for 0.6 hours each. The third and fourth flights were for 1 hour each. The fourth flight was on August 27th. All flights were conducted at 4AK6. The accident was in a relatively flat, residential area next to 4AK6. All components of the airplane were located in the vicinity of the main wreckage. The airplane impacted in a nose-low attitude into the back of a hangar and came to rest inside the hangar. About 60 to 80 ft before the impactsite there was evidence of an impact with a tree. The top 10 to 12 ft of the tree was broken off and laying on the ground in the direction of the flight path. Branches and parts of the tree were found scattered between the tree, the hangar, and inside the hangar. The airplane came to rest inside a hangar. The main fuselage was on the floor, with the right wing still attached to the airplane in the attic. The left wing was impact-separated and located outside the building. The flaperon handle was set to the 10° position. Flight control continuity was established in all flight controls with separation from impact damage. Examination of the engine revealed that both cylinders had compression. The spark plugs were not fouled. Engine continuity was confirmed by operating the starter pull handle and watching the propeller move. The engine was a Rotax 850 engine that was designed to be used in snowmachines and was not for aircraft use. The airplane was equipped with a three-blade composite propeller. All three blades exhibited impact damage. There were no mechanical malfunctions or anomalies with the engine that were noted that would have precluded normal operation. A Dynon Skyview system was removed from the airplane and sent for data download at the National Transportation Safety Board Recorders Laboratory. The flight data indicated that at 1203, about 8 seconds before impact, the engine rpm went from idle to max rpm 3 times. Auditory witnesses also recalled hearing the engine fluctuating rpm right before impact. ## Aircraft - Registration: [N2723P](https://openairdocs.org/aircraft/N2723P), registered now, S/N C9404-002 (OpenAirDocs) - Reported make and model: STORY CHARLES BRAD TT FOX - Registry model: [Story Charles Brad TT FOX](https://openairdocs.org/model/story-charles-brad-tt-fox) (registry code 05640JT) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: C9404-002 - Year built: 2022 - Engines: Rotax E-TEC 850 165 hp reciprocating - Damage: Substantial damage - Flight: Flight test, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Airport: 4AK6, Wolf Lake ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 60; injuries: fatal; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; toxicology performed; flight hours: 140 total ## Weather - Conditions: Visual (VMC), Day - Wind: 180° at 5 knots - Visibility: 10 statute miles - Temperature: 59 °F, dew point 48 °F - Altimeter: 29.49 inHg - Observed at: PAAQ, 6 nm away - METAR: PAAQ 292053Z 18005KT 10SM SCT015 SCT065 15/09 A2949 RMK AO2 SLP989 T01500089 51005 $ ## 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 20220829015499A](https://openairdocs.org/incident/20220829015499A), Aug 29, 2022: Story Charles Brad TT FOX, Wasilla, AK, Substantial damage, 1 fatal. Aircraft crashed into a hangar next to the gravel crosswind runway. Multiple witnesses state that the pilot reported being in the downwind for the paved runway… ## Docket (9 files) The files NTSB released with the investigation on November 7, 2023, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=105826. 20.6 MB in all. - Cockpit display - recorded flight data - specialist's factual report (item 1, PDF, 13 pages, 3.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14787803&FileExtension=pdf&FileName=ANC22FA069%20Cockpit%20Display%20-%20Recorded%20Flight%20Data%20-%20Specialist%27s%20Factual%20Report-Rel.pdf - Attachment 1 to cockpit display - recorded flight data - specialist's factual report (item 2, CSV, 529 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14789260&FileExtension=csv&FileName=ANC22FA069%20Attachment%201%20to%20Cockpit%20Display%20-%20Recorded%20Flight%20Data%20-%20Specialist%27s%20Factual%20Report-Rel.csv - Witness statements (item 3, PDF, 5 pages, 164 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16233432&FileExtension=pdf&FileName=ANC22FA069%20Witness%20Statements%20combined%202-Rel.pdf - Wreckage examination summary (item 4, PDF, 20 pages, 5.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16233217&FileExtension=pdf&FileName=ANC22FA069%20Wreckage%20exam%20summary%202a-Rel.pdf - Excerpt of pilot's logbook (item 5, PDF, 1 page, 630 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15074166&FileExtension=pdf&FileName=Pilot%27s%20logbook-Rel.pdf - FAA airworthiness and conformity inspection (item 6, PDF, 18 pages, 7.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15074767&FileExtension=pdf&FileName=2723P-Airworthiness-Rel.pdf - No autopsy or toxicology report memorandum (item 7, PDF, 1 page, 153 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16218666&FileExtension=pdf&FileName=No%20Autopsy%20or%20toxicology%20report-Rel.pdf - Release of aircraft wreckage, NTSB form 6120.15 (item 8, PDF, 2 pages, 71 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15163913&FileExtension=pdf&FileName=ANC22FA069%20Wreckage%20Release%20Form_Redacted-Rel.pdf - Investigative photographs (item 9, PDF, 3 pages, 3.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15047753&FileExtension=pdf&FileName=Photo%20Array%20ANC22FS069_Redacted-Rel.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.