Hudson Hiperbipe SNS-7 N898DH

Summary

On 18 August 2004 at about 16:10 local time, a Hudson Hiperbipe SNS-7 registered N898DH, operated by Marty H. Palmer / Wick Air, Inc., was involved in an accident near Palmer, Alaska, United States. One person was on board and one died. The aircraft was destroyed. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

18 August 2004 at 16:10

Classification

Accident

Location

Palmer, Alaska, United States

Nearest airport

Wolf Lake Airport (4AK6)

Coordinates

61.6461, -149.2925

Aircraft

Hudson Hiperbipe SNS-7

Registration

N898DH

Category

Airplane

Engines

1

Operator

Marty H. Palmer / Wick Air, Inc.

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Palmer → Palmer

Aircraft damage

Destroyed

Weather

VMC

Light

Day

NTSB number

ANC04LA093

1 person died.

The pilot's failure to maintain control of the airplane, which resulted in an uncontrolled descent and subsequent in-flight collision with trees. A factor associated with the accident was a low altitude maneuver preformed by the pilot just after takeoff.

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

Read the full NTSB narrative

The solo private pilot was departing in a recently built experimental/homebuilt airplane. A witness reported that just after the airplane became airborne, it climbed to about 200 to 300 feet above the runway. As it approached the departure end, it initially turned about 90-degrees to right of the runway centerline, immediately followed by a tight 360-degree turn to the left, circling the departure end of the runway. As the airplane continued the tight 360-degree left turn, the wings rolled and continued to roll until the airplane was inverted. The nose of the airplane abruptly pitched down, and the airplane descended into a large stand of trees at the departure end of the runway, followed by a large plume of black smoke. The wood and fabric-covered airplane was destroyed by a combination of impact forces and a postimpact fire. A postaccident investigation revealed that the accident pilot had been diagnosed with Type II diabetes about 12 years prior, and was using self-administered insulin injections to control his diabetes. A review of the pilot's FAA Airman Medical Records Center located in Oklahoma City, dating back to July 1, 1980, revealed no disclosure of his use of medications or any diagnosis of diabetes. The aviation medical examiner that issued the pilot his most recent third-class medical certificate was not the pilot's personal physician that was treating him for diabetes. The pilot's primary care physician prescribed Humalog 75/25 insulin for treatment of diabetes. Humalog 75/25 insulin has a very rapid onset of glucose-lowering action, and the manufacturer recommends that the dose be given within 15 minutes before eating a meal to avoid hypoglycemia (low blood glucose), a condition which can lead to behavioral changes, confusion, fatigue, seizures, and loss of consciousness. The pathologist that conducted the postmortem examination noted that the pilot's stomach was empty. Postmortem toxicology tests revealed the presence of glucose in the pilot's urine, suggesting that his blood glucose was likely over 180 mg/dL at some time between his awakening and the time of the accident (normal levels are typically between 80 and 120 mg/dL).

Quoted verbatim from the NTSB record.