NTSB Final: Aero Commander 112 | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

Airborne Unlimited -- Recent Daily Episodes

Episode Date

Airborne Unlimited-Monday

Airborne Unmanned

Airborne Unlimited-Wednesday Airborne Flight Training

Airborne Unlimited-

Airborne-ANN Airborne Unlimited--01.25.21 Airborne-Unmanned--01.26.20 Airborne Unlimited--01.27.21 Airborne-Flight Training--01.14.20 Airborne Unlimited--01.22.21

Airborne On YouTube

Airborne Unlimited--01.25.21


Airborne Unlimited--01.27.21 Airborne-Flight Training--01.14.20

Airborne Unlimited--01.22.21

Thu, Jan 14, 2021

NTSB Final: Aero Commander 112

No Evidence Of The Vacuum Pump Ever Being Overhauled Or Replaced

Location: Vieques, Puerto Rico Accident Number: NYC04FA223
Date & Time: February 14, 2004, 21:00 Local Registration: N1261J
Aircraft: Aero Commander 112 Aircraft Damage: Substantial
Defining Event: Injuries: 1 Fatal
Flight Conducted Under: Part 91: General aviation - Personal

Analysis: While proceeding eastbound at night along the shoreline of an island, the airplane began a rapid spiral descent, and impacted the ground. Despite an extensive search by multiple entities, the airplane remained missing for approximately 4 years; however, when the wreckage was located, there was sufficient evidence to show that the vacuum pump, which powered the attitude indicator and the directional gyro, had failed. Examination of Federal Aviation Administration (FAA) records revealed that the airplane had accrued in excess of 1,224.8 total hours of operation, but no evidence of the vacuum pump ever being overhauled or replaced was discovered. The pilot did not possess an instrument rating, and most likely had not flown at night for approximately 10 years. The airplane was equipped with an autopilot; however, the pilot was reported not to be experienced in its use. Taking into consideration the direction of flight, available weather data, and the lack of ground lights in the area, there would have been no visible horizon forcing the pilot to maintain control of the airplane solely by referencing the flight instruments. It has been well documented that such conditions can result in a myriad of vestibular illusions which can be extremely difficult to overcome. One illusion in particular can cause a pilot to believe the airplane is in level flight, when in reality, it is in a gradual turn. If the airspeed increases, the pilot may experience a postural sensation of a level dive and pull back on the yoke, which tightens the turn. If recovery is not initiated, a steep spiral will develop and continue until the airplane impacts the ground or water. The FAA's Airplane Flying Handbook states that "unless a pilot has many hours of training in instrument flight, flight in reduced visibility or at night when the horizon is not visible should be avoided." FAA Advisory Circular AC 91-75, highlights that pilots tend to rely heavily on the attitude indicator in instrument meteorological conditions, and that vacuum system failures can be a significant cause or contributor to fatal accidents because in most cases the corresponding instruments slowly becomes inaccurate, making the failure difficult to recognize.

Probable Cause and Findings
The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The pilot's inadequate preflight and in-flight planning and decision making which resulted in the airplane entering instrument meteorological conditions. Contributing to the accident was the pilot's lack of instrument experience, a vacuum pump failure, and the night lighting conditions.

FMI: www.ntsb.gov


More News

ANN's Daily Aero-Linx (01.24.21)

Aero Linx: Alaska Department of Transportation and Public Facilities -- Statewide Aviation Aviation touches all aspects of life in rural Alaska, and is a basic mode of transportati>[...]

Aero-News: Quote of the Day (01.24.21)

“We explored a number of alternatives, but after careful consideration, we simply cannot execute a worthwhile event that would not potentially endanger both the community and>[...]

ANN's Daily Aero-Term (01.24.21): Hazardous Weather Information

Hazardous Weather Information Summary of significant meteorological information (SIGMET/WS), convective significant meteorological information (convective SIGMET/WST), urgent pilot>[...]

Airborne 01.25.21: Electric Velis, Whitehouse Moon Rock, Drone Chutes

Also: Bryant S-76B Crash Hearing, AeroEducate Initiative, Liberty University, Sustainable Fuels Pipistrel-USA reports that over the course of 2020, Pipistrel delivered 111 certifie>[...]

Airborne 01.22.21: Aero-Friedrichshafen Postponed, ASR SBX Chute, Airbus Update

Also: Partial Aero-Recovery in 2021?, Bell 412, 15 More KC-46 Tankers, Super Bowl LV v Drones Another major aviation event has had to give way to the damage done by the COVID pande>[...]

blog comments powered by Disqus





© 2007 - 2021 Web Development & Design by Pauli Systems, LC