20130425005599A

Accident · Substantial damage

FAA accident report · Bell 407 · Big Fork, MT · April 25, 2013

Date
April 25, 2013 · 10:30 local
Place
Big Fork, MT
Phase of flight
Landing: Approach
Operating rules
General operating rules (Part 91)
Damage
Substantial damage
Aircraft
N937GR
NTSB investigation
NTSBWPR13TA205
Reported as
Bell 407
Reported engine
Allison 250-C47B
People aboard
3
Fatal injuries
0
Other injuries
0
Pilot’s certificates
Airline transport, flight instructor
Pilot’s flight hours
6,900 total140 in this make and model61 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.

Aircraft on public use mission for sheriffs office attempted to land on mt aeneas, MT. Elev 7254 MSL. During high recon pilot stated he was at 65 knots IAS in right hand orbit, aircraft started spinning to the right, pilot added full left anti tq. Pedal and lowered collective. Aircraft continued to spin and continued descent. Pilot raised collective twice to aviod cliffs, pilot maintained full left anti tq. Pedal. Aircraft landed in snow, right skid dug into snow and aircraft rolled on right side. Damage to tail boom, all drive componets, windshield, skids and right side windows. Landing elevation 6300 ft. wind from the west at top of mt @ appx 35 to 50 KTS. Aircraft was on leeward side when loss of control occurred. Loss of tail rotor effectiveness (lte)

As the FAA filed it

AIRCRAFT ON PUBLIC USE MISSION FOR SHERIFFS OFFICE ATTEMPTED TO LAND ON MT AENEAS, MT. ELEV 7254 MSL. DURING HIGH RECON PILOT STATED HE WAS AT 65 KNOTS IAS IN RIGHT HAND ORBIT, AIRCRAFT STARTED SPINNING TO THE RIGHT, PILOT ADDED FULL LEFT ANTI TQ.PEDAL AND LOWERED COLLECTIVE. AIRCRAFT CONTINUED TO SPIN AND CONTINUED DESCENT. PILOT RAISED COLLECTIVE TWICE TO AVIOD CLIFFS, PILOT MAINTAINED FULL LEFT ANTI TQ. PEDAL. AIRCRAFT LANDED IN SNOW, RIGHT SKID DUG INTO SNOW AND AIRCRAFT ROLLED ON RIGHT SIDE. DAMAGE TO TAIL BOOM, ALL DRIVE COMPONETS, WINDSHIELD, SKIDS AND RIGHT SIDE WINDOWS. LANDING ELEVATION 6300 FT. WIND FROM THE WEST AT TOP OF MT @ APPX 35 TO 50 KTS. AIRCRAFT WAS ON LEEWARD SIDE WHEN LOSS OF CONTROL OCCURRED. LOSS OF TAIL ROTOR EFFECTIVENESS (LTE)

NTSB investigation

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