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NTSB Report
January 20, 1990 · Boeing B737-300 · N338UA
Cedar Rapids, IA
Overview
Report Status
Probable Cause
Event Type
Incident
Date
January 20, 1990
Injury Outcomes
No injuries (72 uninjured)
Location
Cedar Rapids, IA
Aircraft
Boeing B737-300
Tail Number
N338UA
Operator
United Airlines
Injuries
None
Aircraft Damage
Minor
NTSB Number
CHI90IA070
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.
NTSB Probable Cause
THE FAILURE OF ALL FOUR MAIN LANDING GEAR TIRES ON TAKEOFF DUE TO THE PARKING BRAKE BEING LOCKED.
Full Narrative
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.
Flight
Event TypeIncident
Event Time07:10 CST
Nearest AirportCedar Rapids Muni (0nm N)
Runway9
Runway Length7000 ft
Runway Width150 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBoeing B737-300
Tail NumberN338UA
Aircraft CategoryAir
DamageMinor
OperatorUnited Airlines
Operating RulePart 121
Engines2
Engine TypeTurbofan
Engine DetailsGe · CF56 · Turbofan · 19000
People & Injuries
Injury SummaryNo injuries (72 uninjured)
Fatal0
Serious0
Minor0
Uninjured72
Total72
Crew 1First Class
Conditions
ConditionsVMC
LightDaylight
Wind80° @ 9 kt
Visibility5 sm
CeilingOvercast 3200 ft
Temperature / Dew Point30 C / 27 C
Altimeter29.00 inHg
Observation Time12:50
Weather SourceWFAC