# NTSB LAX99LA304: Glover Teenie TWO, N925SG, Chino, CA, September 12, 1999 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: September 11, 1999, 17:30 local (Sep 12, 1999, 00:30 UTC) - Place: Chino, CA - Coordinates: 34.000118, -117.68032 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=34.0001&lon=-117.6803&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 1 minor - Status: Completed, report May 17, 2001 - Report: Approved by Office Director - NTSB case key (mKey): 47339 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX99LA304 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/47339/pdf - Page: https://openairdocs.org/ntsb/LAX99LA304 ## Probable cause The in-flight separation and loss of the carburetor fuel jet resulting from the pilot's improper installation of the component. Also causal was the pilot's failure to maintain an adequate airspeed margin following the loss of power, which resulted in an inadvertent stall and spiral. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power(total) - mech failure/malf, approach - vfr pattern - downwind - fuel system,carburetor - not safetied (cause) - maintenance,installation - improper, owner/pilot mechanic (cause) - fuel system,carburetor - separation (cause) - Forced landing, emergency landing after takeoff - Loss of control - in flight, emergency descent/landing - airspeed - not maintained, pilot in command (cause) - stall/spin - inadvertent, pilot in command - In flight collision with terrain/water, descent - uncontrolled ## Analysis While in the traffic pattern after takeoff, the engine lost power, the pilot lost control, and the airplane crashed. The airport control tower operator stated that the pilot radioed that he was unable to climb and wanted to return for landing. After clearing him to land, he observed the airplane entering a tight nose down spiral. The airplane remained in the spiral until it disappeared from his view. The engine had been experiencing overheating and loss of power problems. The pilot had replaced the fixed jet in his single jet carburetor with an adjustable jet just before the accident. The FAA inspector who examined the wreckage noted that the jet was missing from the carburetor. The pilot's student pilot certificate did not show a solo endorsement for this make and model airplane. ## Factual narrative On September 11, 1999, at 1730 hours Pacific daylight time, an experimental Glover Teenie Two, N925SG, entered a spiral and crashed near the Chino, California, airport while attempting to return to the field for landing. The attempted return to airport maneuver was precipitated by a loss of engine power while in the traffic pattern. The airplane was destroyed; however, the student pilot, the sole occupant, received only minor injuries. The airplane was owned and operated by the pilot as a personal flight under the provisions of 14 CFR Part 91 when the accident occurred. The local flight originated from the Chino airport at 1720 on the evening of the accident. Visual meteorological conditions prevailed at the time and no flight plan had been filed. The airport control tower operator stated that, after takeoff from runway 21, the pilot reported that he was "unable to reach 2,000 feet," and that he needed "to come back and land." He cleared the pilot to land on runway 26R. He next observed the airplane, which at the time was at 1,600 feet msl north of the airport, entering a tight nose down spiral. He said the airplane remained in the spiral until it disappeared from his view. The field elevation at Chino airport is 650 feet msl. A mechanic at the airport told Federal Aviation Administration (FAA) inspectors that the pilot had been experiencing engine problems that involved overheating and loss of power episodes. The tower operator recalled that during taxi, the pilot had had to restart the engine. An FAA inspector reported to the Safety Board investigator that he examined the airplane and interviewed the pilot. According to the inspector, the pilot had replaced the fixed jet in his single jet carburetor with an adjustable jet. When the inspector examined the carburetor after the accident, he noted that the jet was missing from the carburetor. A visual search of the immediate area failed to locate the missing jet. The FAA inspector also provided the airplane data that is contained in this report. According to FAA records, the pilot reported having accumulated a total of 9 hours of flight time on September 16, 1997, when he completed an application for a third-class medical certificate. At the time of the accident, the pilot told the same inspector that had flown the accident airplane exclusively since he completed its construction on July 7, 1999, a total of 44.7 hours. The pilot's student pilot certificate; however, did not show a solo endorsement for this make and model airplane. An initial Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1/2, was sent on September 14, 1999, along with a cover letter explaining the pilot's reporting responsibilities. The letter also contained a telephone number for the pilot to call for help or information about meeting the requirements. When the pilot failed to respond to the initial contact, a second form again with an accompanying cover letter of instructions was sent on May 17, 2000. Both envelopes were sent to the address that the pilot had reported to the FAA as his place of residence on his latest application for a medical certificate, dated November 3, 1997. Neither letter has been returned. ## Aircraft - Registration: [N925SG](https://openairdocs.org/deregistered/N925SG-2015-05-19), registration cancelled 2015-05-19, S/N 15-2733, built 1999 (OpenAirDocs) - Reported make and model: Glover TEENIE TWO - Registry model: [Glover Stephen P TEENIE TWO](https://openairdocs.org/model/glover-stephen-p-teenie-two) (registry code 05605HV) (OpenAirDocs) - Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 15-2733 - Airframe hours: 44 - Engines: AMA/EXPR UNK reciprocating - Damage: Destroyed - Flight: Personal, Part 91 - Registered owner: Stephen Preston Glover - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Annual, September 4, 1999, 10 hours before - Departed: CNO - Airport: CNO, Chino, runway 26R, 4,856 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; student; medical: class 3, valid medical--no waivers/lim.; seat: front; flight hours: 44 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 290° at 12 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 81 °F, dew point 54 °F - Altimeter: 29.00 inHg - Observed at: CNO ## 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 19990911026269A](https://openairdocs.org/incident/19990911026269A), Sep 11, 1999: Amtr TEENIE2, Chino, CA, Destroyed. (.19) On September 11, 1999, at 1730 hours pacific daylight time, an experiemental glover teenie weenie, N925SG, entered a spiral and crashed near the Chino,… 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.