Aviation Accident Investigations and Safety Analysis

Practice flashcards covering accident facts, investigative findings, and certification issues from the USAir Flight 427 and TWA Flight 800 lecture notes.

What was the date of USAir Flight 427?

September 8, 1994

What is intended flight path of USAir Flight 427?

Chicago O’Hare to Pittsburgh International

What type of plane was USAir Flight 427?

Boeing 737-800

Death toll of USAir Flight 427?

all 132 occupants

What was the probable cause of the USAir Flight 427 crash?

Loss of control from the rudder moving to its blowdown limit.

What vulnerable system and potential problems were identified in the USAir Flight 427 investigative findings?

The vulnerable system was the dual-concentric PCU servo valve, with potential problems being a jammed servo valve and reversal of hydraulic fluid flow.

What was the NTSB verdict regarding the dual-concentric servo valve in USAir Flight 427?

lack of functional redundancy

Which other incidents were listed alongside USAir Flight 427 under investigative findings?

Eastward Flight 517 (1996), United Airlines Flight 585 (1991),United Airlines Ground Check (1992)

What was the is death toll of TWA Flight 800?

all 230 occupants

What was the intended flight path of TWA Flight 800?

JFK to CDG (Paris, France)

What was the probable cause of the TWA Flight 800 crash on July 17, 1996?

short circuit outside of CWT (excessive voltage)

When did TWA Flight 800 crash?

July 17, 1996

What colored early investigations in TWA flight 800?

Focus on terrorism, and tunnel vision

Similar Incidents to TWA Flight 800

Iranian Air Force B747-131,Aviance Flight 203 B727,Phillippine Airline B737-300, Thai Airways B737-400

Why did the Safety Board question the idea that eliminating all ignition sources was the best design?

all possible ignition sources cannot be predicted