Cessna 421C N66NC

Summary

On 10 July 2021 at about 14:45 local time, a Cessna 421C registered N66NC was involved in an accident near Longmont, Colorado, United States. 4 people were on board and 4 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

10 July 2021 at 14:45

Classification

Accident

Location

Longmont, Colorado, United States

Nearest airport

Vance Brand Airport (LMO)

Coordinates

40.1673, -105.1693

Aircraft

Cessna 421C

Registration

N66NC

Category

Airplane

Year built

1978

Engines

2

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Unknown → Aspen

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

CEN21LA315

4 people had minor injuries.

The loss of performance for reasons that could not be determined.

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

Read the full NTSB narrative

The pilot reported that he performed the “before starting engine” and “starting engine” checklists and everything was normal before taking off in the twin-engine airplane. He performed an engine runup and then started his takeoff roll. The pilot reported that about halfway down the runway the airplane was not accelerating as fast as it should. He attempted to rotate the airplane; however, “the airplane mushed off the runway.” The airplane settled back onto the runway, then exited the departure end of the runway, where it sustained substantial damage to the wings and fuselage. The airplane engine monitor data indicated the airplane’s engines were operating consistent with each other at takeoff power at the time of the accident. Density altitude at the time of the accident was 7,170 ft and according to performance charts, there was adequate runway for takeoff. The reason for the loss of performance could not be determined.

Quoted verbatim from the NTSB record.