Agusta A109 N57BL

Summary

On 12 September 1984 at about 23:20 local time, a Agusta A109 registered N57BL was involved in an accident near Clifton, Arizona, United States. 2 people were on board and nobody was injured. The aircraft was substantially damaged. No probable cause statement is available for this record.

Date

12 September 1984 at 23:20

Classification

Accident

Location

Clifton, Arizona, United States

Nearest airport

Greenlee Co.

Coordinates

33.2703, -109.2691

Aircraft

Agusta A109

Registration

N57BL

Category

Helicopter

Engines

2

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Silver City → Scottsdale

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

LAX84LA478

Nobody was injured.

The NTSB has not published a probable cause for this record. No probable cause statement is present in the source data.

Nothing about the cause is stated here that is not in the source record.

Read the full NTSB narrative

THE PLT REPORTED THAT HE LANDED FIRMLY ON THE GROUND AT THE MAIN RAMP & WENT INTO THE 2 MIN COOL DOWN MODE FOR ENG SHUTDOWN. HE STATED THAT IMMEDIATELY AFTER THE POWER LEVERS WERE RETARDED TO IDLE, HE FELT A SLIGHT LATERAL MOVEMENT OF THE CONTROLS WHICH WAS FOLLOWED BY AN ACCELERATED LATERAL MOVEMENT OF THE HELICOPTER. HE STATED THAT THE HELICOPTER THEN WENT INTO A VIOLENT LATERAL & FORWARD VIBRATION. HE SHUT OFF THE ENG & APPLIED THE ROTOR BRAKE. HOWEVER, BEFORE THE VIBRATION STOPPED, THE TAILROTOR ASSEMBLY HIT THE GROUND & THE MAIN GEAR COLLAPSED. NO PRE-ACCIDENT PART FAILURE OR MALFUNCTION WAS FOUND THAT WOULD HAVE RESULTED IN THE VIBRATION OR GROUND RESONANCE.

Quoted verbatim from the NTSB record.