Boeing 757-222 N508UA
14 February 1993 · Grand Junction, Colorado, United States · No injuries
Summary
On 14 February 1993 at about 02:15 local time, a Boeing 757-222 registered N508UA, operated by United Airlines, was involved in an incident near Grand Junction, Colorado, United States. 47 people were on board and nobody was injured. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 02:15
- Classification
- Incident
- Location
- Grand Junction, Colorado, United States
- Coordinates
- 39.1094, -108.5300
- Aircraft
- Boeing 757-222
- Registration
- N508UA
- Category
- Airplane
- Engines
- 2
- Operator
- United Airlines
- Operating rule
- Part 121: Air Carrier
- Purpose of flight
- Unknown
- Phase of flight
- Not recorded
- Route
- Philadelphia → Los Angeles
- Aircraft damage
- Not recorded
- Weather
- VMC
- Light
- Night/Dark
- NTSB number
- DEN93IA027
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 47 | 0 | 0 | 0 | 47 |
Probable cause
FAILURE OF THE LEFT GENERATOR CONTROL UNIT (GCU), INTEGRATED DRIVE GENERATOR (IDG), RIGHT (SIDE) ENGINE INDICATOR AND CREW ALERT SYSTEM (EICAS), AND BUS TIE BAR (BTB).
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
WHILE CRUISING AT FL390, THE AUTOTHROTTLES AND AUTOPILOT DISENGAGED, THE CAPTAIN'S INSTRUMENTS FAILED, AND THE COCKPIT LIGHTING CYCLED ON AND OFF. THE LEFT GENERATOR LIGHT ILLUMINATED, THE EICAS FAILED, A CYCLIC BANGING WAS HEARD, AND AN ACRID ODOR WAS NOTICEABLE. THE LEFT AC BUS AND TRANSFER BUS WERE DEENERGIZED AND THE CAPTAIN ELECTED TO DIVERT TO THE NEAREST SUITABLE AIRPORT. POST INCIDENT INVESTIGATION DISCLOSED A SHORTED DIODE IS THE LEFT GCU (GENERATOR CONTROL UNIT), A DEFECTIVE IDG (INTEGRATED DRIVE GENERATOR), A SHORT IN THE INPUT POWER FILTER IN THE EICAS (ENGINE INDICATOR AND CREW ALERT SYSTEM), AND A DEFECTIVE BTB (BUS TIE BAR).
Quoted verbatim from the NTSB record.
Other Boeing 757 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 8 Jun 1993 | Boeing 757-222 | Los Angeles, California, United States | United Airlines | No injuries | - |
| 23 Feb 1993 | Boeing 757-232 | Fort Lauderdale, Florida, United States | Delta Airlines | No injuries | - |
| 2 Aug 1993 | Boeing 757-222 | Denver, Colorado, United States | United Airlines | No injuries | - |
| 24 Jun 1993 | Boeing 757-222 | Baraboo, Wisconsin, United States | - | Serious injuries | - |
| 16 Sep 1993 | Boeing 757-232 | Atlanta, Georgia, United States | - | Serious injuries | - |
| 27 Apr 1993 | Boeing 757-232 | Miami, Florida, United States | Delta Air Lines, Inc. | Serious injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 15 Oct 1993 | Cessna 172F | Co. Springs, Colorado, United States | - | No injuries | - |
| 22 Oct 1993 | Beechcraft A36TC | Pueblo, Colorado, United States | - | Minor injuries | - |
| 3 Nov 1993 | Bellanca BL17-31ATC | Pagosa Springs, Colorado, United States | - | No injuries | - |
| 22 Oct 1993 | Cessna 210 | Monte Vista, Colorado, United States | Anderson, Robert W. | No injuries | - |
| 25 Nov 1993 | Cessna R172K | Mancos, Colorado, United States | - | Minor injuries | - |
| 30 Nov 1993 | Cessna A185F | Maybell, Colorado, United States | - | No injuries | - |