# NTSB FTW03LA164: Aerotek Pitts S-2A, N97DW, Grand Prairie, TX, May 31, 2003 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: May 31, 2003, 10:30 local (15:30 UTC) - Place: Grand Prairie, TX - Coordinates: 32.698333, -97.046386 - Nearby events: https://openairdocs.org/map.md?lat=32.6983&lon=-97.0464&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report March 2, 2004 - Report: Approved by Office Director - Parties: Federal Aviation Administration - NTSB case key (mKey): 57090 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW03LA164 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/57090/pdf - Page: https://openairdocs.org/ntsb/FTW03LA164 ## Probable cause the pilot's improper inspection of the aircraft after impacting trees on a previous flight which resulted in an in-flight separation of the lower left wing and aileron while performing aerobatic maneuvers. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Airframe/component/system failure/malfunction, maneuvering - maintenance,inspection - improper, pilot in command (cause) - wing - separation - flight control,aileron - separation ## Analysis During the recovery from an aerobatic maneuver, a section of the lower left wing separated in-flight, and the airplane landed uneventfully at the departure airport. Approximately 5 minutes into the flight, the pilot was performing a power-on stall. During the stall, the airplane broke to the left, and then the airplane entered an inverted spin. During the spin, the aircraft performed approximately two rotations. To recover, the pilot reduced power, and the airplane entered a nose low attitude. The pilot "pulled hard" to recover from the nose low attitude, and the airplane again broke to the left. During recovery of the ensuing dive, the airplane was shuddering and a section of the lower left wing separated. Approximately 30 days prior to the accident flight, during a low altitude pass over some of the pilot's property, the airplane impacted the tops of some trees. The pilot repaired the airplane fabric damage with duct tape and did not report what additional inspections and/or repairs had been completed. He also had not received any formal aerobatic instruction and was learning aerobatics on his own. ## Factual narrative On May 31, 2003, approximately 1030 central daylight time, an Aerotek Pitts S-2A single-engine aerobatic bi-plane, N97DW, sustained substantial damage following a partial in-flight breakup while maneuvering near Grand Prairie Municipal Airport (GPM), Grand Prairie, Texas. The commercial pilot and his passenger were not injured. The airplane was registered to and operated by the pilot. Visual meteorological conditions prevailed, and a flight plan was not filed for the 14 Code of Federal Regulations Part 91 personal flight. The local flight departed GPM at 1020. In an interview with the NTSB investigator-in-charge, the pilot stated that approximately 5 minutes into the flight, he was performing a power-on stall. During the stall, the airplane broke to the left, and then the airplane entered an inverted spin. During the recovery from the spin, an outboard section of the bottom left wing separated. Subsequently, the pilot returned to GPM and landed uneventfully. In an interview with an FAA inspector, the pilot stated that during the spin, the aircraft performed approximately two rotations. To recover the airplane, the pilot reduced power, and the airplane entered a nose low attitude. The pilot "pulled hard" to recover from the nose low attitude, and the airplane again broke to the left. During the recovery from the ensuing dive, the airplane was shuddering and a section of the lower left wing separated. The pilot stated that after the flight, the 'G' meter read +7.2/-2, and the flight lasted a total of 10 minutes. The FAA inspector reported the airplane has a +6/-3 'G' limit load factor, and a +9/-4.5 'G' ultimate load factor. In addition, the pilot reported approximately 30 days prior to the accident flight, during a low altitude pass over some of his property, the airplane impacted the tops of some trees. The pilot repaired the airplane fabric damage with duct tape and did not report what additional inspections and/or repairs had been completed. He also had not received any formal aerobatic instruction and was learning aerobatics on his own. Examination of the airplane by the pilot revealed that a 4-foot portion of the bottom left wing and the left aileron had separated from the aircraft. According to an FAA Airworthiness Inspector who examined the airplane, the forward wooden wing spar was splintered and fractured, and the aileron was separated. The separated section and aileron were not recovered. Numerous attempts to obtain a completed NTSB Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2) from the pilot were unsuccessful. ## Aircraft - Registration: N97DW (not matched to a registry record) - Reported make and model: Aerotek Pitts S-2A - Category: Airplane - Serial number: 2150 - Engines: Lycoming AEIO-360 200 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Christopher G. Anderson - Airworthiness certificate: Standard, Aerobatic; Standard, Normal - Departed: GPM, Grand Prairie, TX ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 38; injuries: none; commercial, private; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim. ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 86 °F, dew point 61 °F - Altimeter: 29.81 inHg - Observed at: GPM, 5 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 20030531037899A](https://openairdocs.org/incident/20030531037899A), May 31, 2003: Aviat PITTSS2A, Grand Prairie, TX, Substantial damage. (-23) On may 31, 2003, approximately 1030 central daylight time, an aerotek pitts S-2A single-engine aerobatic bi-plane, N97DW, sustained substantial damage… 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.