20120925023289A

Accident · Substantial damage

FAA accident report · Robinson Helicopter R22 BETA · Anchorage, AK · September 25, 2012

Date
September 25, 2012 · 17:55 local
Place
Anchorage, AK
Airport
Merrill Field
Phase of flight
Hover/Holding
Operating rules
Pilot school (Part 141)
Operator
3AYS
Damage
Substantial damage
Aircraft
N4171J
NTSB investigation
NTSBANC12CA111
Reported as
Robinson Helicopter R22 Beta
Reported engine
Lycoming O-360-J2A
People aboard
2
Fatal injuries
0
Other injuries
0
Pilot’s certificates
Commercial pilot, flight instructor
Pilot’s flight hours
336 total260 in this make and model100 in the last 90 days

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

R-22 helicopter hover autorotation:the CFI was PIC for the flight with a student in which simulated power failures at a hover (hovering autorotations) were being practiced. The student rolled throttle to idle position, but simultaneously pulled up collective and the helicopter drifted slightly left. The CFI corrected too much to the right and allowed the helicopter to continue a sideward drift to the right. Additionally, the CFI did not point the helicopter in the same direction of drift. Consequently, when the helicopter touched the ground, it touched down on the right skid only and with a sideward drift pausing momentarily before rolling onto the right side of the helicopter. Since the rotor blades were still turning, there was significant damage to the rotor blades themselves as they hit the ground, but they also damaged the cockpit bubble windows and instrument panel as the blades came through the cockpit. No injuries were sustained by either the CFI or student.

As the FAA filed it

R-22 HELICOPTER HOVER AUTOROTATION:THE CFI WAS PIC FOR THE FLIGHT WITH A STUDENT IN WHICH SIMULATED POWER FAILURES AT A HOVER (HOVERING AUTOROTATIONS) WERE BEING PRACTICED. THE STUDENT ROLLED THROTTLE TO IDLE POSITION, BUT SIMULTANEOUSLY PULLED UP COLLECTIVE AND THE HELICOPTER DRIFTED SLIGHTLY LEFT. THE CFI CORRECTED TOO MUCH TO THE RIGHT AND ALLOWED THE HELICOPTER TO CONTINUE A SIDEWARD DRIFT TO THE RIGHT. ADDITIONALLY, THE CFI DID NOT POINT THE HELICOPTER IN THE SAME DIRECTION OF DRIFT.CONSEQUENTLY, WHEN THE HELICOPTER TOUCHED THE GROUND, IT TOUCHED DOWN ON THE RIGHT SKID ONLY AND WITH A SIDEWARD DRIFT PAUSING MOMENTARILY BEFORE ROLLING ONTO THE RIGHT SIDE OF THE HELICOPTER. SINCE THE ROTOR BLADES WERE STILL TURNING, THERE WAS SIGNIFICANT DAMAGE TO THE ROTOR BLADES THEMSELVES AS THEY HIT THE GROUND, BUT THEY ALSO DAMAGED THE COCKPIT BUBBLE WINDOWS AND INSTRUMENT PANEL AS THE BLADES CAME THROUGH THE COCKPIT.NO INJURIES WERE SUSTAINED BY EITHER THE CFI OR STUDENT.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.