ASN Wikibase Occurrence # 121699
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| Date: | Friday 25 January 2008 |
| Time: | 09:45 LT |
| Type: |  Airbus A320-232 |
| Owner/operator: | United Airlines |
| Registration: | N462UA |
| MSN: | 1272 |
| Year of manufacture: | 2000 |
| Total airframe hrs: | 27021 hours |
| Engine model: | IAE V2527-A5 |
| Fatalities: | Fatalities: 0 / Occupants: 107 |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | Newark Liberty International Airport, NJ (ERW/KEWR) -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Passenger - Scheduled |
| Departure airport: | Newark-Liberty International Airport, NJ (EWR/KEWR) |
| Denver International Airport, CO (DEN/KDEN) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
This incident occurred when United Airlines flight UA731 experienced a fault in the airplane's AC 1 electrical bus, one of the two primary electrical distribution systems for the airplane, which in turn caused a number of other electrical busses on the aircraft to lose power. The loss of this electrical power led to the loss of a number of aircraft displays and systems. During the flights return to the airport, multiple messages on the electronic centralized aircraft monitoring (ECAM) system, which provides information to the crew regarding failures that have occurred on the aircraft along with recommended corrective actions, were being displayed then removed by the ECAM system, making it difficult for the flight crew to interpret and address the error messages. There were no faults found in the airplane wiring and the testing and teardown found don faults in the #1 integrated drive generator (IDG), bus tie contactor (BTC), and generator control unit (GCU).
Probable Cause: a fault in the airplane's AC 1 electrical bus that caused a number of other electrical busses on the aircraft to lose power.
Accident investigation:
 |
|
Sources:
NTSB DCA08IA033
History of this aircraft
Other occurrences involving this aircraft
| 12 October 2020 | N462UA | United Airlines | 0 | near Chicago-O'Hare International Airport, IL (ORD/KORD) | |
min |
| Windscreen cracks or failure | ||||||
Location
Images:
Taken by the passenger next to me (in the window seat) of the emergency equipment rolled to meet the flight as it landed.
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 12-Apr-2011 14:57 | ataratics | Added |
| 12-Apr-2011 15:24 | ataratics | Updated [Aircraft type, Registration, Source, Narrative] |
| 12-Apr-2011 15:27 | harro | Updated [Date, Aircraft type, Cn, Total occupants, Nature, Source, Damage] |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
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