20001111041759A

Accident · Substantial damage

FAA accident report · Snias AS 350 B2 · Girdwood, AK · November 11, 2000

Date
November 11, 2000 · 13:00 local
Place
Girdwood, AK
Airport
Girdwood Airport
Phase of flight
Low Level Operations
Operating rules
Air taxi and commuter (Part 135)
Operator
ERAA
Damage
Substantial damage
Aircraft
N216EH
NTSB investigation
NTSBANC01LA020
Reported as
Snias AS350B2
Reported engine
TMECA ARRIEL1D1
People aboard
2
Fatal injuries
0
Pilot’s flight hours
6,041 total297 in this make and model121 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.

(-23) Pilot was hovering helicopter down a ridgeline 10-20 feet above the surface at an elevation of 2700 feet heading into the wind creating blowing snow along an adjacent slope for a film shoot of an advertisement for mountain dew. The helicopter was making the fourth run at 5 KIAS but continued further than previous runs and experience flat light conditions from an adjacent mountain shadow. The pilot lost depth perception and became momentarily disoriented while attempting to fly the helicopter forward and up, contacting the tail rotor in 4-5' of loose snow. The pilot landed the helicopter on a nearby road with no abnormal vibrations. Upon inspection of the helicoopter by the pilot, there was no obvious visual damage. Company maintenance was notified and upon further inspection, the tail rotor drive shaft was found to have evidence of torsional stress applied from the contact of the tail rotor with the frozen surface. The tail rotor itself remained intact.

As the FAA filed it

(-23) PILOT WAS HOVERING HELICOPTER DOWN A RIDGELINE 10-20 FEET ABOVE THE SURFACE AT AN ELEVATION OF 2700 FEET HEADING INTO THE WIND CREATING BLOWING SNOW ALONG AN ADJACENT SLOPE FOR A FILM SHOOT OF AN ADVERTISEMENT FOR MOUNTAIN DEW. THE HELICOPTER WAS MAKING THE FOURTH RUN AT 5 KIAS BUT CONTINUED FURTHER THAN PREVIOUS RUNS AND EXPERIENCE FLAT LIGHT CONDITIONS FROM AN ADJACENT MOUNTAIN SHADOW. THE PILOT LOST DEPTH PERCEPTION AND BECAME MOMENTARILY DISORIENTED WHILE ATTEMPTING TO FLY THE HELICOPTER FORWARD AND UP, CONTACTING THE TAIL ROTOR IN 4-5' OF LOOSE SNOW. THE PILOT LANDED THE HELICOPTER ON A NEARBY ROAD WITH NO ABNORMAL VIBRATIONS. UPON INSPECTION OF THE HELICOOPTER BY THE PILOT, THERE WAS NO OBVIOUS VISUAL DAMAGE. COMPANY MAINTENANCE WAS NOTIFIED AND UPON FURTHER INSPECTION, THE TAIL ROTOR DRIVE SHAFT WAS FOUND TO HAVE EVIDENCE OF TORSIONAL STRESS APPLIED FROM THE CONTACT OF THE TAIL ROTOR WITH THE FROZEN SURFACE. THE TAIL ROTOR ITSELF REMAINED INTACT.

NTSB investigation

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