# NTSB MIA97LA154: Grumman American G-1159, N75CC, Miami, FL, April 30, 1997 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: April 30, 1997, 09:15 local (13:15 UTC) - Place: Miami, FL - Coordinates: 25.700069, -80.469367 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=25.7001&lon=-80.4694&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report February 2, 1998 - Report: Approved by Office Director - NTSB case key (mKey): 38274 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA97LA154 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/38274/pdf - Page: https://openairdocs.org/ntsb/MIA97LA154 ## Probable cause The failure of the Landing gear nose gear for undetermined reasons. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Nose gear collapsed, landing - roll - landing gear,nose gear - undetermined ## Analysis The nose gear collapsed on landing roll out following thrust reverser application. Examination of the nose gear by manufacture's staff revealed no specific cause for the collapse of the nose gear. ## Factual narrative On April 30, 1997, about 0915 eastern daylight time, a Grumman American G-1159, N75CC, registered to Crown Credit Company Ltd. and operated by Crown Equipment Corporation, while on a 14 CFR Part 91 corporate flight, experienced a nose landing gear collapse upon landing at Kendall-Tamiami Airport, Miami, Florida. Visual meteorological conditions prevailed and an instrument flight rules flight plan was filed. The aircraft sustained substantial damage and the airline transport pilot and airline transport-rated copilot reported no injuries. The flight originated from Neil Armstrong Airport, Wapakoneta, Ohio, about 2 hours 15 minutes before the accident. The pilot reported that the nose landing gear collapsed while on the landing roll following thrust reverser application. The nose of the aircraft pitched down and impacted the runway. Both flightcrew members stated to the FAA that they observed landing gear down and locked visual indications following the approach and final checklist completion. Gulfstream Aerospace examination of the landing gear system stated, "Based on the investigation and available evidence it is considered that the incident was primarily precipitated by; 1) an out of rig condition of the 1159H20262 Nose Gear Retract Actuator and/or the 10-321934-1 Micro-switch roller guard, and 2) seal failure within the 1159H20262 Nose Gear Retract Actuator, 3) findings of what was deemed to be excessive friction within 1159LM30667 Downlock "Over-Center" Link assembly would not have been sufficient to cause the event by itself. It is considered that this secondary condition could have provided additional causal effect. Gulfstream Aerospace concluded that the investigation into the cause of the landing incident that occurred on Gulfstream G1159 S/N 117 has not revealed any one specific cause for the incident. (See extract from Report No. 1159SER97-198, Date: 27 July, 1997) ## Aircraft - Registration: N75CC (not matched to a registry record) - Reported make and model: Grumman American G-1159 - Category: Airplane - Serial number: 117 - Engines: Rolls-Royce SPEYMK511-8 11400 lbs thrust turbo fan - Damage: Substantial damage - Flight: Executive/Corporate, Part 91 - Operator: Crown Equipment Corporation - Registered owner: Crown Credit Company Ltd - Airworthiness certificate: Standard, Transport - Departed: AXV, WAPAKONETA, OH - Destination: TMB - Flight plan: IFR - Airport: TMB, Kendall-Tamiami Executive, runway 9, 4,999 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 37; flight instructor, airline transport, commercial; airplane ratings: multi-engine land, multi-engine sea, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 7,800 total, 4,000 in this make and model, 5,250 as pilot in command, 141 in the last 90 days, 44 in the last 30 days, 2 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 40° at 6 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 72 °F, dew point 63 °F - Altimeter: 30.00 inHg - Observed at: TMB ## 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 19970430011119A](https://openairdocs.org/incident/19970430011119A), Apr 30, 1997: Gulstm G1159, Miami, FL, Substantial damage. Nose gear folded landing during reverse thrust. Out of rig. Actuator seal failure also. (-23) the nose landing gear collapsed during landing. No physical… 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.