# NTSB MIA00IA186: Grumman G-73T, N142PA, Watson Island, FL, June 11, 2000 - Type: NTSB incident investigation - Classification: Incident · No injuries · Incident investigation · Final report - Date: June 11, 2000, 11:30 local (15:30 UTC) - Place: Watson Island, FL - Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 17 uninjured - Status: Completed, report May 8, 2001 - Report: Approved by Office Director - NTSB case key (mKey): 49403 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA00IA186 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/49403/pdf - Page: https://openairdocs.org/ntsb/MIA00IA186 ## Probable cause the overload separations of the control yoke on the captain's side. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Airframe/component/system failure/malfunction, taxi - from landing - flt control syst,yoke/control stick - overload (cause) ## Analysis After landing, the pilot stayed on the step, and water taxied. The pilot had the control yoke up to his chest, and the captain's side control separated from the vertical column. Examination of the surface control column assembly, fitting P/N 112703, revealed that the fracture surface showed no evidence of preexisting fracture areas on any of the four fracture regions. All fractures were typical of overstress separations. ## Factual narrative On June 11, 2000, about 1130 eastern daylight time, a Grumman G-73T, N142PA, operated by Chalks Airlines Inc., had the captain's side control yoke separate while water taxiing at Watson Island, Florida. Visual meteorological conditions prevailed at the time and a VFR flight plan was filed for the 14 CFR Part 121 scheduled international flight. The airplane received minor damage. The two airline transport-rated pilots, and 15 passengers reported no injuries. The flight departed from Bimini, Bahamas, at an unknown time. After landing, the pilot stayed on the step, and water taxied. The pilot had the control yoke up to his chest, and the captain's side control separated from the vertical column. The surface control column assembly, fitting P/N 112703 was sent to the NTSB Materials Laboratory, Washington, D. C., for examination. According to the laboratory report, the assembly was fractured at the intersection of the stem and collar portion, with four separate fracture regions created. According to the NTSB Materials Laboratory factual report, "...visual examination of the fracture surface...showed no evidence of preexisting fracture areas on any of the four fracture regions. All fractures were typical of overstress separations." ## Aircraft - Registration: [N142PA](https://openairdocs.org/deregistered/N142PA-2010-03-25), registration cancelled 2010-03-25, S/N J42 (OpenAirDocs) - Reported make and model: Grumman G-73T - Registry model: [Grumman G-73T](https://openairdocs.org/model/grumman-g-73t) (registry code 3951902) (OpenAirDocs) - Registry engine: [U/A Canada PT6A-34](https://openairdocs.org/engine/u-a-canada-pt6a-34) (registry code 61534, turbo-prop) (OpenAirDocs) - Category: Airplane - Serial number: J42 - Airframe hours: 28180 - Engines: P&W PT6A-34 680 horsepower turbo prop - Damage: Minor damage - Flight: Part 121 - Registered owner: Chalks Airline - Airworthiness certificate: Standard, Transport - Last inspection: AAIP, April 26, 2000, 150 hours before - Departed: NSB, BIMINI, OF - Destination: MPB - Flight plan: VFR ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 28; airline transport, commercial, flight instructor; airplane ratings: single-engine land, multi-engine land, multi-engine sea; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 4,533 total, 890 in this make and model, 4,010 as pilot in command, 265 in the last 90 days, 90 in the last 30 days, 5 in the last 24 hours ## Weather - Conditions: Day - Wind: 100° at 14 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 82 °F, dew point 72 °F - Altimeter: 30.00 inHg - Observed at: MIA ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Incident 20000611035039I](https://openairdocs.org/incident/20000611035039I), Jun 11, 2000: Gulstm G73, Watson Island, FL, Minor damage. (-23)On June 11, 2000, at 1130 am, a Grumman G73T, N142PA landed at Watson Island. As the aircraft was water taxing, the pilot applied rearward movement to the… ## Other investigations on N142PA (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 MIA01IA144](https://openairdocs.org/ntsb/MIA01IA144), May 22, 2001: Grumman G-73 (N142PA), Fort Lauderdale, FL, incident, minor damage. Probable cause: The improper review of component records by company maintenance personnel of returned landing gear components from a laboratory for magnaflux and x-ray. This resulted in unserviceable components… 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.