ASN Wikibase Occurrence # 370561
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| Date: | Wednesday 7 June 2000 |
| Time: | 13:36 LT |
| Type: |  Boeing 767-222 |
| Owner/operator: | United Airlines |
| Registration: | N603UA |
| MSN: | 21864/4 |
| Year of manufacture: | 1981 |
| Total airframe hrs: | 61647 hours |
| Engine model: | P&W JT9D-7R4D |
| Fatalities: | Fatalities: 0 / Occupants: 165 |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | LAFAYETTE, IN -
 United States of America
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | New York-John F. Kennedy International Airport, NY (JFK/KJFK) |
| San Francisco International Airport, CA (SFO/KSFO) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The captain said that while in cruise flight, "...the center autopilot made an uncommanded disconnect." He said that he took control of the aircraft and found that the rudder and elevator systems appeared to be functioning normally but "...the control wheel was jammed in the straight and level position." He said that approximately 15 pounds of force was applied in order to free the control wheel. The flight was diverted and an uneventful landing was made. A postaccident examination revealed that the wheel well canted pressure deck drain lines were obstructed by debris. A Boeing service bulletin was found that recommends changes to the drain system to "...help ensure that fluid entering the canted pressure deck area will be drained out of the airplane and not leak into the wheel well area where it could freeze on the aileron control cables..." The aircraft arrived at JFK on June 6, 2000 at 1956 eastern daylight time. Weather reports for the JFK airport show rain during the night of June 6, 2000 and during the morning of June 7, 2000.
Probable Cause: The blocked drain lines in the canted pressure deck and the frozen aileron cable.
Accident investigation:
 |
|
Sources:
NTSB CHI00IA152
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 25-Mar-2024 11:59 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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