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| Date: | Saturday 20 January 1990 |
| Time: | 08:10 LT |
| Type: |  Boeing 737-3B7 |
| Owner/operator: | United Airlines |
| Registration: | N338UA |
| MSN: | 24242/1613 |
| Year of manufacture: | 1988 |
| Engine model: | CFMI CFM56 |
| Fatalities: | Fatalities: 0 / Occupants: 72 |
| Other fatalities: | 0 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | Cedar Rapids, IA -
 United States of America
|
| Phase: | Take off |
| Nature: | Passenger - Scheduled |
| Departure airport: | |
| Denver International Airport, CO (KDEN) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
ALL FOUR MAIN LANDING GEAR TIRES FAILED DURING THE TAKEOFF ROLL JUST PRIOR TO ROTATION. THE PARKING BRAKE HAD BEEN SET ON THE ICY RUNWAY TO DO AN ENGINE RUNUP. THE CAPTAIN STATED HE HAD RELEASED THE BRAKES AT THE BEGINNING OF THE ROLL, AND THE COPILOT SAID HE HAD HEARD THE BRAKES RELEASE. HOWEVER, NEITHER PILOT HAD CHECKED TO SEE IF THE RED PARKING BRAKE LIGHT WAS ON. POST INCIDENT INSPECTION REVEALED BOTH THE CAPTAIN'S AND COPILOT'S PARKING BRAKE ACTUATION RIGGING TO BE OUT OF ADJUSTMENT.
Probable Cause: THE FAILURE OF ALL FOUR MAIN LANDING GEAR TIRES ON TAKEOFF DUE TO THE PARKING BRAKE BEING LOCKED.
Accident investigation:
 |
|
Sources:
NTSB CHI90IA070
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 22-Mar-2024 15:00 | ASN Update Bot | Added |
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