CHI84IA224

NTSB incident investigation · Beech 99 · Chicago, IL · June 9, 1984

Incident · Minor injuriesIncident investigationFinal report
Date
June 9, 1984, 09:26 local (14:26 UTC)
Place
Chicago, IL
Injuries
1 minor, 10 uninjured
Damage
Minor damage
Phase of flight
Landing
Aircraft
N320BABeech 99
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19840609038539I
Case key
12451

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

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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.

Gear collapsedLanding
Hydraulic system - fatigueCause
Gear down and locked - not possiblePilot in command

Analysis

Landing gear extended but not locked. Crew could not rectify situation by using normal and emergency gear extension procedures. Gear collapsed on touchdown. Investigation disclosed a fatigue crack in rt main gear hydraulic actuator allowing a loss of hydraulic fluid. Maintenance records provided by the operator indicate the actuators were checked for leaks and alignment 28 hrs prior to this incident.

Aircraft

Registration
N320BA
Reported as
Beech 99
Category
Airplane
Serial number
U56
Airframe hours
29,000
Engine
P&W PT6A-20, 550 horsepower, turbo prop
Damage
Minor damage
Flight
Part 135
Registered owner
Britt Airways, Inc.
Airworthiness certificate
Standard, Normal
Last inspection
Continuous airworthiness · June 5, 1984 · 28 hours before
Departed
BMG · Bloomington, IN
Destination
ORD · Chicago, IL
Flight plan
IFR
Airport
ORD · O'Hare, runway 14, 11,600 × 200 ft, asphalt

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
41
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Left

Weather

Conditions
Visual (VMC) · Day
Wind
220° at 5 knots
Visibility
4 statute miles
Lowest ceiling
4,600 ft broken
Temperature
72 °F, dew point 68 °F
Altimeter
29.00 inHg
Observed at
ORD

FAA reports on this event · 1

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