Hughes 269B N9566F

Summary

On 7 December 1992 at about 22:52 local time, a Hughes 269B registered N9566F, operated by Maui Wing and Rotor, was involved in an accident near Kahului, Hawaii, United States. 2 people were on board and nobody was injured. The aircraft was destroyed. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

7 December 1992 at 22:52

Classification

Accident

Location

Kahului, Hawaii, United States

Coordinates

20.8709, -156.4506

Aircraft

Hughes 269B

Registration

N9566F

Category

Helicopter

Engines

1

Operator

Maui Wing and Rotor

Operating rule

Part 91: General Aviation

Purpose of flight

Aerial Observation

Phase of flight

Not recorded

Aircraft damage

Destroyed

Weather

VMC

Light

Day

NTSB number

LAX93LA063

Nobody was injured.

FAILURE OF THE PILOT TO MAINTAIN ADEQUATE ROTOR RPM DURING DOWNWIND FLIGHT AND ADEQUATE ALTITUDE TO RECOVER THE LOSS OF MAIN ROTOR RPM BEFORE SETTLING INTO THE WATER. CONTRIBUTING TO THE ACCIDENT WAS THE PILOT'S LACK OF ROTORCRAFT FLIGHT EXPERIENCE.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

A HUGHES 269B DITCHED IN THE OCEAN AFTER AN INFLIGHT LOSS OF CONTROL. THE HELICOPTER WAS IN CRUISE FLIGHT ABOUT 100 FEET ABOVE THE WATER. THE PILOT DESCENDED TO ABOUT 20 FEET ABOVE THE WATER AND DECELERATED TO ABOUT 20 MILES PER HOUR. THE HELICOPTER BEGAN TO VIBRATE AND THE MAIN ROTOR RPM BEGAN TO DROP. THE PILOT TURNED RIGHT AND INCREASED THE THROTTLE. THE PILOT NOTICED THE MANIFOLD PRESSURE INCREASED COMMENSURATE WITH THE THROTTLE APPLICATION; HOWEVER, THE ROTOR RPM CONTINUED TO DROP. THE PILOT LOWERED THE COLLECTIVE TO REGAIN MAIN ROTOR RPM BUT DUE TO THE LOW ALTITUDE THE HELICOPTER DESCENDED INTO THE WATER. THE PILOT REPORTED THAT A TAIL WIND EXISTED WHEN THE HELICOPTER EXPERIENCED THE LOSS OF MAIN ROTOR RPM. THE WINDS AT THE LOCAL AIRPORT LOCATED 1.5 MILES FROM THE ACCIDENT SITE WERE REPORTED TO BE FROM 110 DEGREES AT 12 KNOTS GUSTING TO 29 KNOTS AT THE TIME OF THE ACCIDENT. THE PILOT HAD ACCRUED 75 HOURS IN HELICOPTERS OF WHICH 40 HOURS WERE IN THE ACCIDENT HELICOPTER MAKE AND MODEL AND 30 HOURS WERE AS PILOT IN COMMAND.

Quoted verbatim from the NTSB record.