Beechcraft F33A N179DD

Summary

On 20 April 1990 at about 21:00 local time, a Beechcraft F33A registered N179DD, operated by Delta Delta Partnership, was involved in an accident near Milwaukee, Wisconsin, United States. 3 people were on board and 3 had minor injuries. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

20 April 1990 at 21:00

Classification

Accident

Location

Milwaukee, Wisconsin, United States

Nearest airport

Milwaukee Mitchell (MKE)

Coordinates

42.9804, -87.8993

Aircraft

Beechcraft F33A

Registration

N179DD

Category

Airplane

Engines

1

Operator

Delta Delta Partnership

Operating rule

Part 91: General Aviation

Purpose of flight

Business

Phase of flight

Not recorded

Route

Fargo → Unknown

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

CHI90LA115

3 people had minor injuries.

THE UTILIZATION OF IMPROPER PROCEDURES ON THE PART OF THE PILOT IN COMMAND BY ATTEMPTING TO EXECUTE A COUPLED APPROACH OUTSIDE THE PARAMETERS OF THE AUTOPILOT.

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

Read the full NTSB narrative

THE PILOT ENGAGED THE AUTOPILOT APPROACH MODE TO EXECUTE A COUPLED ILS APPROACH WHILE HE WAS HIGH AND FAST WITH A 2000 FOOT PER MINUTE RATE OF DESCENT. THIS WAS OUTSIDE THE PARAMETERS FOR A STABILIZED APPROACH. WHEN THE AUTOPILOT CAPTURED THE GLIDE SLOPE, THE AIRCRAFT NOSED OVER SHARPLY, FLEW THROUGH THE GLIDE SLOPE, PULLED UP SHARPLY, FLEW THROUGH THE GLIDE SLOPE GOING UP, AND NOSED OVER AGAIN BEFORE THE PILOT COULD DISENGAGE THE AUTOPILOT. PILOT LANDED THE AIRCRAFT WITHOUT FURTHER INCIDENT, BUT THE PITCH EXCURSIONS HAD EXCEEDED THE STRESS LIMITS OF THE AIRCRAFT.

Quoted verbatim from the NTSB record.