CHI96LA127

NTSB accident investigation · Socata TBM-700 · Eau Claire, WI · March 29, 1996

Accident · No injuriesLimited investigationFinal report
Date
March 29, 1996, 17:33 local (22:33 UTC)
Place
Eau Claire, WI
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N292RGSocata TBM-700
Weather
Visual (VMC) · Day
Status
Completed · report February 18, 1997
Report
Approved by Office Director
FAA report
19960329046429A
Case key
10224

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

fatigue fracture and subsequent failure of the gear door hinge bracket.

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.

Airframe/component/system failure/malfunctionClimb
Door,landing gear - fatigueCause
Wheels up landingLanding

Analysis

The pilot reported that an 'unsafe gear door light' was displayed 'shortly after departing.' He recycled the landing gear. The right main landing gear did not extend. He performed several normal and emergency gear extension attempts with no success. He had several telephone patch conversations with the airplane manufacturer and flight safety. The right main landing gear could not be lowered. He orbited to burn down fuel, declared an emergency, and conducted a gear up landing. Examination of the right main landing gear revealed a fatigue fracture in the right inboard landing gear door forward hinge bracket. The door was wedged in the wheel well.

Factual narrative

On March 29, 1996, at 1733 central standard time, a Socata TBM-700, N292RG, operated by Chemrite Industries, Inc. sustained substantial damage while landing in Eau Claire, Wisconsin, with the right main landing gear in the retracted position. The commercial pilot and private pilot rated passenger reported no injuries. The 14 CFR Part 91, business flight originated in Rice Lake, Wisconsin at 1400 with a planned destination of Milwaukee, Wisconsin. Visual meteorological conditions prevailed.

In his written statement, the pilot reported that an "unsafe gear door light" was displayed "shortly after departing." He recycled the landing gear. The right main landing gear did not extend. He performed several normal and emergency gear extension attempts with no success. He had several telephone patch conversations with the airplane manufacturer and flight safety. The right main landing gear could not be lowered. He orbited to burn down fuel, declared an emergency, and conducted a gear up landing. The airplane sustained substantial damage to the lower fuselage.

Examination of the right main landing gear revealed the right inboard landing gear door, forward hinge bracket was fractured. The door was wedged in the wheel well. The fractured bracket was examined by a NTSB metallurgist. In his factual report, he stated "SEM inspections of the crack revealed fatigue progression features emanating from both surfaces of the mounting flange."

Aircraft

Registration
N292RG
Reported as
Socata TBM-700
Category
Airplane
Serial number
14
Airframe hours
720
Engine
P&W PT6A-64, 700 horsepower, turbo prop
Damage
Substantial damage
Flight
Business · Part 91
Registered owner
Chemrite Industries, Inc
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · March 29, 1996 · 3 hours before
Departed
RIE · Rice Lake, WI
Destination
MWC · Milwaukee, WI
Airport
EAU · Chippewa Valley Regional, runway 4, 7,311 × 150 ft, concrete

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
29
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
1,126 total · 218 in this make and model · 1,065 as pilot in command · 50 in the last 90 days · 25 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
60° at 8 knots
Visibility
10 statute miles
Lowest ceiling
20,000 ft broken
Temperature
50 °F

FAA reports on this event · 1

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