Enstrom F-28C N51699

Summary

On 25 October 1987 at about 21:25 local time, a Enstrom F-28C registered N51699 was involved in an accident near Laconia, New Hampshire, United States. 3 people were on board and nobody was injured. The aircraft was substantially damaged. No probable cause statement is available for this record.

Date

25 October 1987 at 21:25

Classification

Accident

Location

Laconia, New Hampshire, United States

Nearest airport

Laconia (LCI)

Coordinates

Not recorded

Aircraft

Enstrom F-28C

Registration

N51699

Category

Helicopter

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

NYC88LA018

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 RPRTD HE WAS DEMONSTRATING A FULL TOUCHDOWN AUTOROTATION IN WINDS THAT WERE FROM 290 DEG AT 15 GUSTING 20 KTS. HE STATED THE TOUCHDOWN WAS SOFT WITH A LOT OF PITCH PULLED IN; HOWEVER, AS HE LOWERED THE COLLECTIVE AFTER TOUCHDOWN, THE RETREATING BLADE FLEXED DOWNWARD & SEVERED THE AFT PORTION OF THE TAIL BOOM & THE TAIL ROTOR DRIVE SHAFT. THE PLT BELIEVED HE HAD LOWERED THE COLLECTIVE TOO FAST AFTER TOUCHDOWN, WHICH WOULD HAVE ALLOWED THE BLADES TO FLAP DOWNWARD. ALSO, HE BELIEVED THE HIGH WIND & REDUCED RPM FROM THE AUTOROTATION WOULD HAVE ATTRIBUTED TO EXCESSIVE FLAPPING OF THE RETREATING ROTOR BLADES.

Quoted verbatim from the NTSB record.