# NTSB LAX06CA250: Robinson R-22B, N475SH, Chino, CA, July 29, 2006 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Data collection · Final report - Date: July 28, 2006, 23:10 local (Jul 29, 2006, 06:10 UTC) - Place: Chino, CA - Coordinates: 33.974723, -117.636665 - Nearby events: https://openairdocs.org/map.md?lat=33.9747&lon=-117.6367&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 2 minor - Status: Completed, report November 29, 2006 - Report: Approved by Office Director - Parties: Federal Aviation Administration - NTSB case key (mKey): 64242 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX06CA250 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/64242/pdf - Page: https://openairdocs.org/ntsb/LAX06CA250 ## Probable cause the certified flight instructor's inadequate supervision and incorrect remedial action. A factor was the student pilot's loss of control in a hovering turn. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, hover - in ground effect - weather condition - crosswind - compensation for wind conditions - inadequate, dual student (contributing factor) - hovering turn - uncontrolled, dual student (contributing factor) - supervision - inadequate, pilot in command(cfi) (cause) - remedial action - incorrect, pilot in command(cfi) (cause) - In flight collision with terrain/water, hover - in ground effect - terrain condition - ground - Roll over, hover - in ground effect ## Analysis The helicopter collided with the ground and rolled over following a loss of directional control while hovering. The student pilot performed a 90-degree pedal turn to the right. As he completed the turn he encountered a right crosswind and began to lose control of the helicopter. The helicopter yawed to the left and drifted into a run-up area. The student asked the certified flight instructor (CFI) to take control. The CFI applied left pedal, causing the left yaw to progress into a spin. Before he realized his mistake and made a corrective input, the helicopter hit the ground and rolled onto its left side. The CFI stated that the helicopter and engine had no mechanical failures or malfunctions during the flight. The Automated Surface Observation System located at the airport reported that the winds were from 240 degrees at 8 knots. ## Factual narrative On July 28, 2006, about 2310 Pacific daylight time, a Robinson R-22B, N475SH, collided with terrain and rolled over at Chino Airport, Chino, California. Silver State Helicopters was operating the helicopter under the provisions of 14 CFR Part 91. The certified flight instructor (CFI) and the student pilot sustained minor injuries; the helicopter sustained substantial damage. The local instructional flight departed Chino about 2300. Visual meteorological conditions prevailed, and no flight plan had been filed. The flight instructor submitted a written report. The purpose of the instructional flight was to practice hover taxi procedures, radio communications, and traffic pattern operations. The CFI taxied the helicopter in a hover down taxiway AA to taxiway D, and then he allowed the student to take control of the helicopter. The student pilot hover taxied east on taxiway D to taxiway G. At the intersection of D and G, the CFI asked the student to do a 90-degree pedal turn to the right. The student executed the pedal turn, but he began to lose control of the helicopter as he encountered a crosswind from the right. The helicopter yawed to the left and drifted into the run-up area at the approach end of runway 26R. The student asked the instructor "do you have this" and the instructor took control of the helicopter. The CFI applied left pedal, causing the yaw to progress into a spin. He thought that he had not applied enough pedal, because the helicopter continued to spin. The CFI then applied full left petal, further increasing the spin. At this point he realized his mistake, but before he could apply right pedal, the helicopter hit the ground and rolled onto its left side, coming to rest in the run-up area for 26R. The student and instructor exited the helicopter through the right side door. The CFI stated that the helicopter and engine had no mechanical failures or malfunctions during the flight. The Automated Surface Observation System located at Chino Airport stated that the winds at 2253 were from 240 degrees at 8 knots. ## Aircraft - Registration: [N475SH](https://openairdocs.org/deregistered/N475SH-2009-11-13), registration cancelled 2009-11-13, S/N 4050, built 2006 (OpenAirDocs) - Reported make and model: Robinson R-22B - Registry model: [Robinson Helicopter R22 BETA](https://openairdocs.org/model/robinson-helicopter-r22-beta) (registry code 7640110) (OpenAirDocs) - Registry engine: [Lycoming O-360-J2A](https://openairdocs.org/engine/lycoming-o-360-j2a) (registry code 42314, reciprocating) (OpenAirDocs) - Category: Helicopter - Serial number: 4050 - Engines: Lycoming O-360-J2A reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Registered owner: Silver State Helicopters LLC - Airworthiness certificate: Standard, Normal - Departed: KCNO, Chino, CA - Destination: KCNO, Chino, CA - Airport: KCNO, Chino Airport, runway 26, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Flight instructor; age 38; injuries: none; flight instructor, commercial; medical: class 2; last flight review June 1, 2006; seat: left; flight hours: 300 total, 285 in this make and model, 215 as pilot in command, 92 in the last 90 days, 77 in the last 30 days, 5 in the last 24 hours - Student pilot; age 45; injuries: none; student; medical: class 2; seat: right; flight hours: 15 total, 15 in this make and model ## Weather - Conditions: Visual (VMC), Night - Wind: 240° at 8 knots - Visibility: 8 statute miles - Lowest ceiling: 1,400 ft overcast - Temperature: 75 °F, dew point 70 °F - Altimeter: 29.96 inHg - Observed at: CNO ## 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 20060728014749A](https://openairdocs.org/incident/20060728014749A), Jul 28, 2006: Robsin R22BETA, Chino, CA, Substantial damage. (-23) Certified instructor pilot stated that the student pilot was practicing hovering. Helicopter was approximately 5 feet above ground when the student pilot… 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.