# NTSB MIA99LA270: Cessna 172RG, N9536B, Orlando, FL, September 24, 1999 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: September 24, 1999, 14:28 local (18:28 UTC) - Place: Orlando, FL - Coordinates: 28.559898, -81.350227 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=28.5599&lon=-81.3502&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report November 30, 2000 - Report: Approved by Office Director - NTSB case key (mKey): 47486 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA99LA270 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/47486/pdf - Page: https://openairdocs.org/ntsb/MIA99LA270 ## Probable cause the pilot's failure to ensure that the landing gear was down and locked following loss of electrical power for undetermined reasons, resulting in substantial damage to the airplane when the right main landing gear collapsed upon landing. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Airframe/component/system failure/malfunction, cruise - electrical system - failure - reason for occurrence undetermined - Gear collapsed, landing - gear down and locked - not verified, pilot in command(cfi) (cause) ## Analysis The flight instructor stated that after leaving St. Petersburg, he experienced radio problems and the alternator tripped off line. The instructor said he could not reset it, so he turned the master switch off, and continued the flight. Prior to landing, the instructor said that he turned on the master switch, extended the landing gear, visibly checked that the left gear was down, but did not get a gear light. During landing, the instructor said the right main gear settled to the runway and gave way, with the airplane exiting the runway. The instructor said that he never attempted to manually pump the gear down. The FAA inspector who conducted the post crash examination of the airplane said that he found the airplane with the left main gear extended and locked, the nose wheel sheared off, and the right gear collapsed into the gear well. The inspector also stated that witnesses told him that they saw the right main gear trailing prior to landing. The inspector stated that the aircraft battery was almost depleted of electrical energy, and the low voltage warning light was on. According to the inspector, thirty degrees of flaps was selected, but the flaps were extended about 10 to 15 degrees, and the manual extension pump for the landing gear was stowed, with no evidence of recent use. The inspector said that after supporting the aircraft and starting the engine, no electrical problems were found. ## Factual narrative On September 24, 1999, about 1428 eastern daylight time, a Cessna 172RG, N9536B, registered to Claire Plane Inc., and operated by Orlando Aero Club, crashed on landing at Orlando Executive Airport, Orlando, Florida, while on a Title 14 CFR Part 91 instructional flight. Visual meteorological conditions prevailed at the time, and an instrument flight rules flight plan was filed. The aircraft received substantial damage, but the airline transport pilot-rated flight instructor and student sustained no injuries. The flight originated from St. Petersburg, Florida, the same day, about 1315. The flight instructor stated that after leaving St. Petersburg, he experienced interference with the aircraft radios which the squelch would not eliminate. The instructor also stated that the alternator tripped off line, and he could not reset it, so he turned the master switch off, and continued the flight to his planned destination. The instructor further stated that upon reaching the destination airport and preparing to land, he turned on the master switch, extended the landing gear, visibly checking that the left gear was down, but did not get a gear light. The instructor stated that the battery had tripped off line, but thinking that the gear was down, he proceeded to land the airplane. During the landing, the right main gear settled to the runway and gave way, with the airplane exiting the runway to the right. The instructor stated that he never attempted to manually pump the gear down. The FAA inspector who conducted the postcrash examination of the accident airplane stated that he found the accident airplane with the left main gear extended and locked, the nose wheel sheared off, and the right main landing gear collapsed and in its gear well. The FAA inspector also stated that witnesses reported to him that they saw the right main gear trailing just prior to landing. The inspector further stated that the aircraft battery was almost depleted of electrical energy, and that the low voltage warning light was activated. According to the inspector, thirty degrees of flaps was selected, but the flaps were only extended about 10 to 15 degrees, and the manual extension pump for the landing gear was stowed, with no evidence of recent use. The inspector said that after supporting the aircraft and starting the engine, no electrical problems were found with the airplane. ## Aircraft - Registration: [N9536B](https://openairdocs.org/deregistered/N9536B-2009-04-08), registration cancelled 2009-04-08, S/N 172RG0862, built 1981 (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: 172RG0862 - Airframe hours: 5401 - Engines: Lycoming O360-F1A6 180 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Operator: Orlando Aero Club, doing business as Orlando Aero Club - Registered owner: Claire Plane Inc. - Airworthiness certificate: Standard, Normal - Last inspection: Annual, February 1, 1999, 50 hours before - Departed: PIE, ST. PETERSBURG, FL - Destination: ORL - Flight plan: IFR - Airport: ORL, Orlando Executive, runway 7, 6,003 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 69; airline transport, flight instructor; airplane ratings: multi-engine land, single-engine sea, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 10,500 total, 400 in this make and model, 9,300 as pilot in command, 40 in the last 90 days, 11 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 210° at 8 knots - Visibility: 19 statute miles - Lowest ceiling: none - Temperature: 84 °F, dew point 66 °F - Altimeter: 29.00 inHg - Observed at: ORL ## 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 19990924040749A](https://openairdocs.org/incident/19990924040749A), Sep 24, 1999: Cessna 172RG, Orlando, FL, Substantial damage. (-23) I am larry d. enlow, an employee of the FAA, serving as an ASI, assigned to the Orlando flight standards office, Orlando, Florida. On September 24,… 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.