- Date
- May 3, 1989, 20:07 local (May 4, 1989, 01:07 UTC)
- Place
- Moline, IL
- Injuries
- 2 uninjured
- Damage
- Minor damage
- Phase of flight
- Landing
- Aircraft
- N511AWFokker F-27 MK500
- Weather
- Visual (VMC) · Night/bright
- Status
- Completed · report August 26, 1992
- Report
- Approved by Office Director
- Case key
- 14283
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.
On this page
Probable cause
Material failure of the landing gear retraction and extension assembly. Inadequate maintenance and troubleshooting procedures in company directives were factors in this incident.
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.
Analysis
The airplane landed with the right main landing gear not fully down and locked. When the airplane touched down, the landing gear would not support the weight of the airplane and it collapsed. The airplane sustained minor damage and neither of the two crewmembers aboard the airplane were injured. The landing gear malfunction had been discovered when the landing gear would not cycle properly during a maintenance check flight. When the flight crew attempted to lower the landing gear after retraction, the right main landing gear would not fully extend. Attempts to extend the landing gear using emergency procedures were not successful.
Aircraft
- Registration
- N511AW
- Reported as
- Fokker F-27 MK500
- Category
- Airplane
- Serial number
- E 10690
- Airframe hours
- 6,005
- Engine
- Rolls-Royce DART 552-7R, 508 horsepower, turbo prop
- Damage
- Minor damage
- Flight
- Part 121
- Operator
- Air Wisconsin
- Registered owner
- Wilmington Trust Co.
- Airworthiness certificate
- Standard, Transport
- Last inspection
- Continuous airworthiness · April 21, 1989 · 81 hours before
- Departed
- ORD · Chicago, IL
- Flight plan
- IFR
- Airport
- MLI · Quad Cities, runway 27, 8,507 × 150 ft, concrete
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 45
- Certificates
- Commercial, Airline transport
- Airplane ratings
- Single-engine land, Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Valid Medical--no waivers/lim.
- Seat
- Left
- Flight hours
- 17,121 total · 2,262 in this make and model · 14,988 as pilot in command · 175 in the last 90 days · 66 in the last 30 days · 6 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Night/bright
- Wind
- 200° at 5 knots
- Visibility
- 12 statute miles
- Lowest ceiling
- None
- Temperature
- 61 °F, dew point 43 °F
- Altimeter
- 30.00 inHg
- Observed at
- MLI
Other investigations on N511AW · 1
Matched to the same aircraft by N-number and date.