De Havilland DHC 2 MK III N30CC

Summary

On 29 May 1999 at about 23:20 local time, a De Havilland DHC 2 MK III registered N30CC, operated by William A. Sego, was involved in an accident near Anchorage, Alaska, United States. 4 people were on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

29 May 1999 at 23:20

Classification

Accident

Location

Anchorage, Alaska, United States

Nearest airport

Lake Hood Strip (Z41)

Coordinates

61.1609, -149.9896

Aircraft

De Havilland DHC 2 MK III

Registration

N30CC

Category

Airplane

Engines

1

Operator

William A. Sego

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

ANC99LA066

Nobody was injured.

The certificated flight instructor's inadequate supervision of the duel student. Factors associated with the accident were the student's inadvertent stall, and a surging turboshaft engine.

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

Read the full NTSB narrative

The pilot-in-command, a certificated flight instructor, was providing turbine transition instruction to the second pilot. The accident airplane had been modified by the installation of a Pratt & Whitney PT6 turbine engine. The instructor pilot stated that the propeller governor control was causing 'the engine to surge.' He added that just prior to touchdown on runway 31, while the second pilot was manipulating the controls, the engine again surged, and the airplane landed hard. In the pilot-in-command's written report, and during a later telephone conversation, he reported that during the previous landings, the second pilot failed to 'carry power so as not to land hard again.' The first pilot said that he then instructed the second pilot as to the differences of a turbine engine vs. a piston engine. He wrote: 'I watched very closely until we were over the runway, and once again, quick as a cat, we stalled and hit hard.' The airplane's fuselage sustained substantial damage.

Quoted verbatim from the NTSB record.