Cessna T210N N6172C

Summary

On 3 April 1997 at about 03:16 local time, a Cessna T210N registered N6172C was involved in an accident near Grand Canyon, Arizona, 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

3 April 1997 at 03:16

Classification

Accident

Location

Grand Canyon, Arizona, United States

Coordinates

36.0309, -112.0196

Aircraft

Cessna T210N

Registration

N6172C

Category

Airplane

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Las Vegas → Unknown

Aircraft damage

Destroyed

Weather

IMC

Light

Night/Dark

NTSB number

LAX97FA143

2 people died.

The pilot's failure to maintain aircraft control due to spatial disorientation and his lack of proficiency in conducting instrument flight. Contributing were the inoperative alternator, cockpit lighting, and vacuum system.

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

Read the full NTSB narrative

During an IFR flight at night, the pilot reported to the Air Route Traffic Control Center controller that he lost the alternator and had switched to his standby generator. He then requested a lower altitude because he was in the clouds and had lost his cockpit lighting. He then reported the loss of his compass and was looking for a clear area. As the controller was attempting to provide no-gyro vectors to the nearest airport the pilot reported various problems with his flight instruments, including the altimeter, and stated that he did not know whether he could fly straight and level. He reported that his altimeter was working again but that he was still in instrument meteorological conditions and had now lost his vacuum pump. He then told the controller that he did not know where he was and that his bank indicator, DG, and HSI were providing conflicting information. The pilot subsequently could not maintain headings provided by the controller or consistent altitude profiles over the next several minutes. His last transmission said he was in a descent and was trying to pull up. Radar data showed a series of 360-degree left turns followed by turns to the right. The last turn to the left was computed at a +5.487 g load factor with an 80-degree angle of bank. The first turn to the right was +4.213 g's with a bank angle of 76 degrees. The vertical stabilizer, the horizontal stabilizers, and the outboard section of the right wing separated in flight. The pilot attended recurrent Cessna 210 flight and simulator training the day before the accident and failed to meet course standards for IFR proficiency. He routinely lost control of the aircraft while in training and declined further IFR training. The standby electric generator powers the turn coordinator but not gyro slaving, cabin lights, HSI information, heated pitot tube, or autopilot.

Quoted verbatim from the NTSB record.