CHI90LA189

NTSB accident investigation · Mitsubishi MU-300 · Milwaukee, WI · July 18, 1990

Accident · No injuriesLimited investigationFinal report
Date
July 18, 1990, 14:00 local (19:00 UTC)
Place
Milwaukee, WI
Injuries
6 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N800TJMitsubishi MU-300
Weather
Visual (VMC) · Day
Status
Completed · report February 8, 1993
Report
Approved by Office Director
FAA report
19900718027139A
Case key
14718

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The pilot's delayed determination of traction or braking action until too little runway remained to go around or to employ alternate means of activiating the brakes. Contributing to the accident was the overservicing of the main gear struts.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

OverrunLanding - roll
Airport facilities,runway/landing area condition - wetFactor
All available runway - not usedPilot in commandFactor
Brakes(normal) - delayedPilot in commandCause
Overconfidence in aircraft's abilityPilot in commandFactor
Airframe/component/system failure/malfunctionLanding - roll
Landing gear,main gear shock absorbing strut - pressure excessiveFactor
Brakes(normal) - not obtainedPilot in commandFactor
Brakes(emergency) - not usedPilot in commandFactor
On ground/water encounter with terrain/waterLanding - roll
Terrain condition - ditchFactor

Analysis

The pilot states he landed softly, commenced aerodynamic braking, then lowered the nosewheel to the runway and applied wheel brakes with anti-skid engaged. He states there was no response to brakes. The airplane overran the runway, sustaining substantial damage. Test of the brake system revealed no discrepancy. Main landing gear struts were found overpressurized. An anti-skid logic circuit interrupts brake activation until load switches on the main struts sense weight on the wheels (struts less than fully extended). There were thunderstorms and rain in the vicinity and the runway was wet. The right main tire track was identifiable as a clean strip across the asphalt and white paint markings at runway departure end.

Aircraft

Registration
N800TJ
Reported as
Mitsubishi MU-300
Category
Airplane
Serial number
22
Airframe hours
1,385
Engine
P&W JT15D, 2,500 lbs thrust, turbo fan
Damage
Substantial damage
Flight
Part 91
Registered owner
Tyler Jet Aircraft Sales Inc
Airworthiness certificate
Standard, Normal
Departed
MLE · Omaha, NE
Flight plan
IFR
Airport
MWC · Timmerman, runway 33R, 4,107 × 75 ft, concrete

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
34
Certificates
Airline transport, Flight instructor
Airplane ratings
Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
5,000 total · 500 in this make and model · 70 in the last 90 days · 20 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
280° at 14 knots
Visibility
2 statute miles
Lowest ceiling
4,000 ft broken
Temperature
75 °F
Altimeter
30.00 inHg
Observed at
MWC

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.