# NTSB LAX98LA228: Pitts S1-S, N71HR, Tracy, CA, July 11, 1998 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Limited investigation · Final report - Date: July 11, 1998, 11:50 local (18:50 UTC) - Place: Tracy, CA - Coordinates: 37.730339, -121.42089 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=37.7303&lon=-121.4209&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Highest injury: Serious injuries - Injuries: 1 serious - Status: Completed, report August 3, 1999 - Report: Approved by Office Director - NTSB case key (mKey): 30145 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX98LA228 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/30145/pdf - Page: https://openairdocs.org/ntsb/LAX98LA228 ## Probable cause The failure of the pilot to maintain adequate clearance with the terrain during aerobatic maneuvering. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - In flight collision with terrain/water, maneuvering - aerobatics - performed, pilot in command - clearance - not maintained, pilot in command (cause) - terrain condition - berm ## Analysis The pilot was performing aerobatic maneuvers in a charted aerobatics practice box, part of which was over a gravel pile/construction site. The aircraft co-owner was on the ground watching the pilot's routine. He maintained radio communication with the pilot during the flight. The pilot informed the aircraft co-owner that he was finished and the co-owner started to head back to the airport. A ground witness saw the aircraft maneuver under a series of telephone lines and around construction equipment about 15 feet agl or less. He stated that the aircraft appeared to be attempting to pull up as it impacted the gravel pit. The witness further reported that the aircraft appeared to have power throughout the maneuvering and he did not notice any decrease in engine noise. The pilot suffered serious injuries and does not remember the accident flight. The aircraft co-owner reported that the pilot did not report any mechanical problems with the aircraft during the accident flight. ## Factual narrative On July 11, 1998, at 1150 hours Pacific daylight time, a Pitts S1-S, N71HR, impacted a gravel pile near the Tracy, California, airport. The aircraft sustained substantial damage, and the private pilot/owner, the sole occupant, suffered serious injuries. The local flight was conducted under 14 CFR Part 91 and originated at an unspecified time. Visual meteorological conditions prevailed and no flight plan was filed. There were three ground witnesses to the accident who were working approximately 50 yards from the point of impact. None of them is a rated pilot. One witness reported that he had just finished some construction work when he heard a airplane close by. He reported that he saw the aircraft maneuver under a series of telephone lines and around construction equipment about 15 feet agl or less. He stated that the aircraft appeared to be attempting to pull up as it impacted the gravel pile. The witness further reported that the aircraft appeared to have power throughout the maneuvering and he did not notice any decrease in engine noise. The co-owner of the airplane reported that he and the pilot have co-owned the aircraft since 1995 and use it to compete in advanced category aerobatic competitions. The co-owner is also the chapter president of the International Aerobatic Club (IAC) and is the Federal Aviation Administration (FAA) designated administrator for the local aerobatic practice area. The gravel pile is in the middle of a charted aerobatics practice box. The floor of the aerobatic practice area is 500 feet agl and the ceiling is 4,000 feet agl. The co-owner reported that he and the pilot usually watch each other's aerobatic routine and maintain radio communication to critique certain maneuvers. On the day of the accident, the co-owner was on the ground watching the pilot run through his routine. The pilot flew for approximately 25 minutes, then reported that he was finished. The co-owner started to head for the airport when he noticed the airplane disappear behind a ridge. The pilot suffered serious injuries and has no recollection of the accident. The co-owner reported that the pilot did not report experiencing any mechanical problems during the accident flight. The aircraft recoverer reported that the fuel lines were leaking at the accident site. The aircraft was cut into three pieces in order to extricate the pilot, and flight control continuity was not established. Both the pilot and aircraft co-owner were sent the pilot/operator report, NTSB form 6120.1/2, several times. Neither contacted the Safety Board investigator nor returned the completed form. ## Aircraft - Registration: [N71HR](https://openairdocs.org/deregistered/N71HR-1999-03-04), registration cancelled 1999-03-04, S/N ROSS PITTS 0101 (OpenAirDocs) - Reported make and model: Pitts S1-S - Registry model: [Ross Herbert E PITTS SPECIAL S1-S](https://openairdocs.org/model/ross-herbert-e-pitts-special-s1-s) (registry code 72206AB) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 0101 - Engines: Lycoming IO-360 180 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Curt Carrell - Airworthiness certificate: Special, Experimental (Special) - Departed: LVK, LIVERMORE, CA ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 38; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: front; flight hours: 723 total, 258 in this make and model, 28 in the last 90 days ## Weather - Conditions: Visual (VMC), Day - Wind: 330° at 8 knots - Visibility: 10 statute miles - Lowest ceiling: 3,300 ft broken - Temperature: 81 °F, dew point 57 °F - Altimeter: 30.00 inHg - Observed at: SCK, 16 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 19980711016539A](https://openairdocs.org/incident/19980711016539A), Jul 11, 1998: Amtr PITTSSPECS1S, Tracy, CA, Substantial damage. Failed to recover from an aerobatic maneuver at an appropiate altitude. Struk pile of gravel in gravel pit.(.4) the pilot was performing aerobatic maneuvers in… 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.