Boeing 767-233 CGAUP
10 April 1993 · Kansas City, Missouri, United States · No injuries
Summary
On 10 April 1993 at about 16:12 local time, a Boeing 767-233 registered CGAUP, operated by Air Canada, was involved in an incident near Kansas City, Missouri, United States. 101 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 16:12
- Classification
- Incident
- Location
- Kansas City, Missouri, United States
- Coordinates
- 39.1103, -94.6892
- Aircraft
- Boeing 767-233
- Registration
- CGAUP
- Category
- Airplane
- Engines
- 2
- Operator
- Air Canada
- Operating rule
- Part 129: Foreign
- Purpose of flight
- Unknown
- Phase of flight
- Not recorded
- Route
- San Francisco → Toronto
- Aircraft damage
- Not recorded
- Weather
- VMC
- Light
- Day
- NTSB number
- CHI93IA152
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 101 | 0 | 0 | 0 | 101 |
Probable cause
A FROZEN AILERON CONTROL BEARING AFTER IT HAD BECOME WORN, CORRODED AND EXPOSED TO WATER, AND THE MANUFACTURER'S INADEQUATE MAINTENANCE/INSPECTION REQUIRMENT OF THE BEARING(S).
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
THE FLIGHT CREW NOTED A LOSS OF AILERON CONTROL (FELT FROZEN), WHILE CRUISING AT FL 370. THEY WERE ABLE TO MAKE HEADING CHANGES BY USING THE RUDDER & ELECTED TO DIVERT TO KANSAS CITY (MCI). THE AIRPLANE HAD BEEN EXPOSED TO RAIN & STANDING WATER BEFORE THE FLIGHT. THE CREW FELT THE LOSS OF AILERON CONTROL MAY HAVE BEEN DUE TO FROZEN WATER IN THE CONTROL SYSTEM. DURING DESCENT TO MCI, ABOVE FREEZING AIR TEMPERATURES WERE ENCOUNTERED, & CONTROL OF THE AILERONS GRADUALLY RETURNED UNTIL FULL CONTROL WAS REGAINED. AN UNEVENTFUL LANDING WAS MADE AT MCI. INVESTIGATION REVEALED WORN AILERON CONTROL BEARINGS IN THE LATERAL CONTROL ACTUATOR SYSTEM. THE WORN BEARINGS WERE TESTED BY SOAKING IN WATER & FREEZING. WATER PENETRATED A BEARING HOUSING & FROZE INSIDE THE BEARING RACE, DISABLING THE BEARING. SUBSEQUENT DISASSEMBLY OF THE BEARING DISCLOSED CORRODED & WORN BALL BEARINGS. BOEING SERVICE LETTER (767-S-27-094) & SEVICE BULLETIN 767-27-0128 WERE ISSUED TO ADDRESS INSPECTION/REPLACEMENT CRITERIA OF THE BEARINGS.
Quoted verbatim from the NTSB record.
Other Boeing 767 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 9 Jan 1993 | Boeing 767-222 | Denver, Colorado, United States | United Airlines | No injuries | - |
| 5 Apr 1993 | Boeing 767-251 | Guatemala City, Panama | Taca International Airlines | Unknown | - |
| 5 Jan 1993 | Boeing 767-323ER | Sarasota, Florida, United States | American Airlines, Inc. | Serious injuries | - |
| 16 Jul 1993 | Boeing 767-322ER | Caribbean Sea | United Air Lines, Inc. | Serious injuries | - |
| 22 Oct 1993 | Boeing 767-300 | Atlantic Ocean | - | Serious injuries | - |
| 28 Jun 1992 | Boeing 767-231ER | Jamica, New York, United States | - | No injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 18 Sep 1993 | Luscombe 8F | Festus, Missouri, United States | - | No injuries | - |
| 19 Nov 1993 | Hughes 369HS | Antonia, Missouri, United States | Drug Enforcement Admin. | Fatal | 1 |
| 3 Oct 1993 | Cessna 150G | Osceola, Missouri, United States | - | No injuries | - |
| 27 Jan 1993 | Piper PA-24 | Buffalo, Missouri, United States | LEE, Albert E. | Serious injuries | - |
| 10 Oct 1993 | Cessna 172 | Independence, Missouri, United States | - | No injuries | - |
| 12 Mar 1993 | McDonnell Douglas DC-9-31 | Saint Louis, Missouri, United States | Trans World Airlines, Inc. | No injuries | - |