# NTSB DEN04CA137: Cessna 172S, N2099J, Erie, CO, August 29, 2004 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: August 29, 2004, 09:00 local (15:00 UTC) - Place: Erie, CO - Coordinates: 40.009998, -105.048332 - Nearby events: https://openairdocs.org/map.md?lat=40.0100&lon=-105.0483&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report December 3, 2004 - Report: Approved by Office Director - Parties: FAA Flight Standards District Office - NTSB case key (mKey): 60063 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN04CA137 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/60063/pdf - Page: https://openairdocs.org/ntsb/DEN04CA137 ## Probable cause the pilot's failure to maintain aircraft control resulting in a hard landing. Factors contributing to the accident were the pilot induced oscillation and the high approach airspeed. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Hard landing, landing - flare/touchdown - airspeed - high (contributing factor) - porpoise/pilot-induced oscillation - encountered, pilot in command (contributing factor) - aircraft control - not maintained, pilot in command (cause) ## Analysis The pilot stated that his approach speed was too high and he "ballooned." The airplane began to porpoise and impacted the nose gear. The pilot added power and aborted the landing. At the time of the landing, the pilot was not aware that a propeller strike had occurred. The flight returned to BJC and a postflight inspection revealed that the firewall was wrinkled and the propeller was damaged. ## Factual narrative On August 29, 2004, at approximately 0900 mountain daylight time, a Cessna 172S, N2099J, piloted by a private pilot, was substantially damaged during a hard landing at Tri-County Airport, Erie, Colorado. Visual meteorological conditions prevailed at the time of the accident. The personal flight was being conducted under the provisions of Title 14 CFR Part 91 without a flight plan. The pilot reported no injuries. The cross-country flight originated at Jefferson County Airport (BJC) at approximately 0845. According to the accident report submitted by the pilot, his approach speed was too high and he "ballooned." The airplane began to porpoise and impacted the nose gear. The pilot added power and initiated a go-around. At the time of the landing, the pilot was not aware that a propeller strike had occurred. The flight returned to BJC and a postflight inspection revealed that the firewall was wrinkled and the propeller was damaged. ## Aircraft - Registration: [N2099J](https://openairdocs.org/deregistered/N2099J-2023-02-04), registration cancelled 2023-02-04, S/N 172S9586, built 2004 (OpenAirDocs) - Reported make and model: Cessna 172S - Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (registry code 2072439) (OpenAirDocs) - Registry engine: [Lycoming IO-360-L2A](https://openairdocs.org/engine/lycoming-io-360-l2a) (registry code 41597, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 17259586 - Airframe hours: 395.6 - Engines: Avco Lycoming IO-360-L2A 180 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Mc Air - Registered owner: First Flight Aviation Services - Airworthiness certificate: Standard, Normal - Last inspection: Annual, August 24, 2004, 386 hours before - Departed: BJC, Broomfield, CO - Destination: BJC, Broomfield, CO - Airport: 48V, Tri-County, runway 33, 4,700 × 60 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 50; injuries: none; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; last flight review July 1, 2003; seat: left; flight hours: 198 total, 165 in this make and model, 110 as pilot in command, 18 in the last 90 days, 6 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 200° at 6 knots - Visibility: 25 statute miles - Lowest ceiling: none - Temperature: 64 °F, dew point 50 °F - Altimeter: 30.12 inHg - Observed at: BJC, 10 nm away ## 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 20040829022299A](https://openairdocs.org/incident/20040829022299A), Aug 29, 2004: Cessna 172S, Erie, CO, Substantial damage. (-23) At approximately 16:00 gmt, at the Erie municipal airport, Erie, Colorado, the aircraft listed above was substantially damaged when the pilot made a hard… ## Other investigations on N2099J (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 CEN21LA414](https://openairdocs.org/ntsb/CEN21LA414), Sep 10, 2021: Cessna 172S (N2099J), LaSalle, CO, substantial damage. Probable cause: A loss of engine power for undetermined reasons. 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.