# NTSB CHI03LA240: Enstrom F-28C, N15SA, Kankakee, IL, August 2, 2003 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: August 2, 2003, 17:55 local (22:55 UTC) - Place: Kankakee, IL - Coordinates: 41.071388, -87.846389 - Nearby events: https://openairdocs.org/map.md?lat=41.0714&lon=-87.8464&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 3 minor, 1 uninjured - Status: Completed, report March 2, 2004 - Report: Approved by Office Director - Parties: Federal Aviation Administration - NTSB case key (mKey): 57629 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI03LA240 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/57629/pdf - Page: https://openairdocs.org/ntsb/CHI03LA240 ## Probable cause The pilot misjudged flare which led to a hard landing. Contributing to the accident was the pilot's failure to follow procedures/directives when he exceeded the airplane's weight and balance. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Hard landing, landing - rotor system,main rotor blade - other (cause) - procedures/directives - not followed, pilot in command (contributing factor) - flare - misjudged, pilot in command (cause) - aircraft weight and balance - exceeded, pilot in command (contributing factor) - On ground/water collision with object, landing - object - vehicle ## Analysis The sightseeing aerial observation helicopter sustained substantial damage when the main rotor impacted the tail rotor drive shaft during a landing in a county fairground parking lot. The tail rotor drive shaft separated from the helicopter. The tail rotor drive shaft impacted the rear window of a vehicle parked in the parking lot. Three passengers reported minor injuries and the pilot reported that he was uninjured. The pilot stated, "I made a stabilized steep approach to the landing area. Once I detected the helicopter skids come in contact with the surface I lowered the collective at that moment the helicopter dropped and lunged forward. The landing site was a nearly level area with 2-3 inch tall grass." Wind was 170 degrees at 7 knots. An on-scene examination of the helicopter detected no pre-impact anomalies. The helicopter's flight manual stated, "The cabin interior is a full, three-place, side by side seating arrangement." The helicopter's center of gravity range was 92.0 to 100 inches. The operator's calculated center of gravity was 91.74 inches. ## Factual narrative On August 2, 2003, about 1755 central daylight time, an Enstrom F-28C helicopter, N15SA, piloted by a commercial pilot, sustained substantial damage when the main rotor impacted the tail rotor drive shaft during a landing in a county fairground parking lot near Kankakee, Illinois. The tail rotor drive shaft separated from the helicopter and impacted the rear window of a vehicle parked in the parking lot. The aerial observation flight was operating under 14 CFR Part 91. Visual meteorological conditions prevailed at the time of the accident. No flight plan was on file. Three passengers reported minor injuries and the pilot reported that he was uninjured. The local sightseeing flight originated from the parking lot near Kankakee, Illinois, at time unknown and was returning to land at that parking lot when the accident occurred. The pilot stated: I was conducting helicopter rides at the fair ground. I made a stabilized steep approach to the landing area. Once I detected the helicopter skids come in contact with the surface I lowered the collective at that moment the helicopter dropped and lunged forward. The landing site was a nearly level area with 2-3 inch tall grass. An on-scene examination of the helicopter was performed. The helicopter was found resting in a grass area roped off for landing. The landing gear skid assemblies were not deformed. No depressions were found in the grass area around the skids. One rotor blade exhibited leading edge nicks and a red colored media transfer on its outboard section. The push-pull tube for that blade was found with its rod end separated from its assembly. The blade's drag link was found with one fork end fractured. Control continuity was established from the cockpit to the other two blades. The push-pull tube with the separation was observed to move in correct relationship to the movement of the cockpit controls. The tail rotor drive shaft was found in the parking lot adjacent to the landing area. The tail rotor drive shaft ends exhibited tears consistent with overload. The tail rotor drive shaft's color scheme was red. The rear section of the tail boom was found torn from its forward section about the splice joint aft of the stabilizer's carry through spar. Both rudder cables were intact at the tail rotor gearbox assembly and moved in correct relationship to movements of the rudder pedals. A deformed strobe light assembly was found on the ground. The examination of the helicopter detected no pre-impact anomalies. The helicopter operator supplied weight and balance data to the Federal Aviation Administration. The helicopter's center of gravity range was 92.0 to 100 inches. The operator's calculated center of gravity was 91.74 inches. At 1803, the Greater Kankakee Airport, about two miles north of the accident site, near Kankakee, Illinois, recorded weather was: Wind 170 degrees at 7 knots: visibility 10 statute miles; sky condition clear; temperature 22 degrees C; dew point 20 degrees C; altimeter 29.90 inches of mercury. Excerpts from the helicopter's flight manual stated: INTERIOR ARRANGEMENT The cabin interior is a full, three-place, side by side seating arrangement with a spacious 61" width for maximum pilot and passenger comfort. ## Aircraft - Registration: [N15SA](https://openairdocs.org/deregistered/N15SA-2008-02-13), registration cancelled 2008-02-13, S/N 469 (OpenAirDocs) - Reported make and model: Enstrom F-28C - Registry model: [Enstrom F-28C](https://openairdocs.org/model/enstrom-f-28c) (registry code 3300407) (OpenAirDocs) - Category: Helicopter - Serial number: 469 - Airframe hours: 4915.7 - Engines: Lycoming HIO360E1AD 205 horsepower reciprocating - Damage: Substantial damage - Flight: Other work use, Part 91 - Operator: Spitfire Aerospace Technologies Inc. - Registered owner: Hartford Holding Corp - Airworthiness certificate: Standard, Normal - Last inspection: Annual, June 5, 2003, 90.5 hours before - Departed: Kankakee, IL - Airport: IKK, Greater Kankakee ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 44; injuries: none; flight instructor, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; last flight review July 2, 2003; seat: left; flight hours: 1,771 total, 125 in this make and model, 1,771 as pilot in command, 82 in the last 90 days, 51 in the last 30 days, 9 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 170° at 7 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 72 °F, dew point 68 °F - Altimeter: 29.89 inHg - Observed at: IKK, 2 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 20030802028769A](https://openairdocs.org/incident/20030802028769A), Aug 2, 2003: Enstrm F28C, Kankakee, IL, Substantial damage. (-23) During landing the pilot stated he lowered the collective while on firm and level ground and then the main rotorblades contacted the tailrotor drive… 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.