# NTSB NYC99LA154: Cessna 172RG, N9475B, Morristown, NJ, May 23, 1999 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: May 23, 1999, 18:45 local (22:45 UTC) - Place: Morristown, NJ - Location: 40.7993° N, 74.4149° W: Placed by OpenAirDocs at MORRISTOWN MUNI (MMU), within about a mile (OpenAirDocs) - Nearby events: https://openairdocs.org/map.md?lat=40.7993&lon=-74.4149&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report September 19, 2000 - Report: Approved by Office Director - NTSB case key (mKey): 46600 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC99LA154 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/46600/pdf - Page: https://openairdocs.org/ntsb/NYC99LA154 ## Probable cause The right main landing gear collapsed for undetermined reasons. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Gear collapsed, landing - landing gear,main gear - collapsed (cause) - reason for occurrence undetermined (cause) ## Analysis The pilot stated that she received her approach clearance about 12 miles from the airport. At that time, she lowered the landing gear and performed a 'gumps' check which included checking the gas, undercarriage, mixture and propeller. After lowering the landing gear, she observed a green landing gear light. The landing seemed normal, and the pilot did not hear a gear warning horn. The right main landing gear collapsed and the airplane spun 180 degrees on the runway. Examination of the wreckage by a Federal Aviation Administration Inspector, and a local mechanic, did not reveal any pre-impact mechanical malfunctions. ## Factual narrative On May 23, 1999, about 1845 Eastern Daylight Time, a Cessna 172RG, N9475B, was substantially damaged while landing at the Morristown Municipal Airport (MMU), Morristown, New Jersey. The certificated commercial pilot and passenger were not injured. Instrument meteorological conditions prevailed for the flight that originated from Ocean City Municipal Airport, Ocean City, Maryland. An instrument flight rules flight plan was filed for the personal flight conducted under 14 CFR Part 91. The pilot stated that she received her approach clearance about 12 miles from MMU. At that time, she lowered the landing gear and performed a "gumps" check. After lowering the landing gear, she observed a green landing gear light. The landing seemed normal, and the pilot did not hear a gear warning horn. Then the right wing lowered to the runway, and the airplane spun 180 degrees on the runway. The pilot further stated that she only performed 1 "gumps" check. According to Air Traffic Control Specialists, the airplane touched down on Runway 23, spun 180 degrees, and came to rest on the runway. The pilot radioed the control tower and advised that the right main landing gear had collapsed. Examination of the wreckage by a Federal Aviation Administration Inspector, and a local mechanic, did not reveal any pre-impact mechanical malfunctions. The Inspector observed damage to the elevator, horizontal stabilizer, right aileron, right flap, and right main landing gear. Additionally, he reported that the empennage and right wing sustained structural damage. At 1845, the reported weather at MMU was: wind calm; visibility 1 mile, mist; ceiling 400 feet overcast, temperature 64 degrees Fahrenheit, dewpoint 63 degrees, altimeter 29.80 inches of Hg. ## Aircraft - Registration: [N9475B](https://openairdocs.org/deregistered/N9475B-2018-04-16), registration cancelled 2018-04-16, S/N 172RG0834 (OpenAirDocs) - Reported make and model: Cessna 172RG - Registry model: [Cessna 172RG](https://openairdocs.org/model/cessna-172rg) (registry code 2072438) (OpenAirDocs) - Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 172RG0834 - Airframe hours: 3549 - Engines: Lycoming O-360 180 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Iris Vogel - Airworthiness certificate: Standard, Normal - Last inspection: Annual, December 11, 1998, 68 hours before - Departed: OXB, OCEAN CITY, MD - Destination: MMU - Flight plan: IFR - Airport: MMU, Morristown Municipal, runway 23, 5,999 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 42; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 607 total, 122 in this make and model, 541 as pilot in command, 39 in the last 90 days, 17 in the last 30 days, 2 in the last 24 hours ## Weather - Conditions: Instrument (IMC), Dusk - Wind: calm - Visibility: 1 statute miles - Lowest ceiling: 400 ft overcast - Temperature: 64 °F, dew point 63 °F - Altimeter: 29.00 inHg - Observed at: MMU ## 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 19990523047849A](https://openairdocs.org/incident/19990523047849A), May 23, 1999: Cessna 172RG, Morristown, NJ, Substantial damage. (-23) Right main gear collapsed after touchdown at mmu. Owner stated she had a green light and had a visual gear down on the left side of the aircraft. After… 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.