Mumm LANCAIR N2114Z

Summary

On 23 December 1995 at about 18:34 local time, a Mumm LANCAIR registered N2114Z was involved in an accident near Morris, Minnesota, United States. 2 people were on board and 2 died. The aircraft was destroyed. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

23 December 1995 at 18:34

Classification

Accident

Location

Morris, Minnesota, United States

Coordinates

45.5804, -95.8993

Aircraft

Mumm LANCAIR

Registration

N2114Z

Category

Airplane

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Instructional

Phase of flight

Not recorded

Aircraft damage

Destroyed

Weather

VMC

Light

Day

NTSB number

CHI96FA065

2 people died.

the partially blocked elevator and improper installation of the elevator bob weight by the owner/builder which prevented full travel of the elevator control system. Factors relating to this accident were the intentional stall and inability to adequately recover from the stall.

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

Read the full NTSB narrative

A witness who observed the airplane before the accident, saw the airplane 'performing a steep climb and then slowly turning left and coming back down. The airplane then straightened out and repeated the maneuver.' The airplane wreckage was discovered approximately 25 minutes later. The pilot/owner-builder told a friend the day before the accident that he intended to test the airplane to see how it would handle in stalls and stall recoveries. Examination of the wreckage revealed that the elevator bob weight was mounted on the idler arm upside down. A mock up of the assembly revealed the upside-down elevator bob weight was contacting the aft elevator push rod, resulting in a partial blockage of the elevator whenever forward stick controls were applied. This limited the elevator control surface to approximately 7 degrees of down elevator travel range. The assembly plans, provided by the kit manufacturer, were designed to provide a down elevator travel range of 13 degrees. The aircraft logbook indicated that as of 12/21/95, the airplane had logged 13.1 hours.

Quoted verbatim from the NTSB record.