MIA01IA144

NTSB incident investigation · Grumman G-73 · Fort Lauderdale, FL · May 22, 2001

Incident · No injuriesIncident investigationFinal report
Date
May 22, 2001, 17:46 local (21:46 UTC)
Place
Fort Lauderdale, FL
Injuries
19 uninjured
Damage
Minor damage
Phase of flight
Taxi
Aircraft
N142PAGrumman G-73
Weather
Visual (VMC) · Day
Status
Completed · report July 30, 2001
Report
Approved by Office Director
Parties
Fort Lauderdale FSDO
FAA report
20010522012019I
Case key
52347

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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Probable cause

The improper review of component records by company maintenance personnel of returned landing gear components from a laboratory for magnaflux and x-ray. This resulted in unserviceable components being tagged as serviceable, installation of unserviceable parts on an operational airplane, and subsequent failure/collapse of the right main landing gear during taxi.

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/malfunctionTaxi
Landing gear - cracked
Maintenance - improperCompany maintenance personnelCause
Landing gear - failure,total
Gear collapsedTaxi

Analysis

The airplane was taxing to the ramp when the right main landing gear collapsed. Examination of the landing gear revealed evidence of preexisting cracks. Review of paper work by company maintenance personnel revealed that components had been sent to a laboratory for examination. Upon return of the components the paperwork indicated that two components had been rejected due to cracks. Company maintenance personnel stated that unserviceable components had been tagged as serviceable and installed on an operational airplane which resulted in the subsequent failure and collapse of the right main landing gear.

Factual narrative

On May 22, 2001, at about 1746 eastern daylight time, a Grumman G-73, N142PA, registered to Seaplane Leasing II LLC, operated by Flying Boat Inc, doing business as Chalks International Airlines flight 512, as a 14 CFR Part 121 scheduled international passenger flight, experienced a collapse of the right main landing gear while taxiing to the parking ramp. The airline transport pilot-in-command, commercial pilot copilot, and 17 passengers reported no injuries. Visual meteorological conditions prevailed and a VFR flight plan was filed. The airplane sustained minor damage. The flight originated from Paradise Island, Bahamas, about 51 minutes before the incident.

Initial examination of the airplane by the FAA revealed the right main landing gear had separated. Two small preexisting cracks and corrosion was found in the vicinity of the failure location.

The Director of Maintenance for Chalks International stated that four landing gear parts were sent to Q.C. Labs for magnaflux and x-ray. The landing gear parts were picked up and brought back to the hangar. The landing gears were prepped, primed, painted, and the landing gear was installed on the incident airplane. On May 22, 2001, N142PA right main landing gear failed while taxiing to the terminal. A review of paperwork from Q.C. Labs revealed that two landing gear parts were rejected because of cracks. A red tag was also attached to the report. " At this time I realized that I had tagged an unserviceable part serviceable by mistake."

Aircraft

Registration
N142PA
Reported as
Grumman G-73
Category
Airplane
Serial number
J42
Airframe hours
29,548
Engine
P&W PT6A-60A, 680 horsepower, turbo prop
Damage
Minor damage
Flight
Part 121
Operator
Flying Boat Inc, doing business as Chalks International Airlines
Registered owner
Seaplane Leasing II LLC
Airworthiness certificate
Standard, Normal
Last inspection
Continuous airworthiness · May 21, 2001 · 12 hours before
Departed
PID · Paradise Island
Destination
FLL · Fort Lauderdale, FL
Flight plan
VFR
Airport
FLL · Ft. Lauderdale-Hollywood Int

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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
27
Injuries
None
Certificates
Airline transport, Flight instructor
Airplane ratings
Single-engine land, Single-engine sea, Multi-engine sea
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
2,500 total · 1,300 in this make and model · 1,800 as pilot in command · 300 in the last 90 days · 100 in the last 30 days · 7 in the last 24 hours
Role
Co-pilot
Age
28
Injuries
None
Certificate
Commercial
Airplane ratings
Multi-engine sea, Single-engine sea, Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Flight hours
1,300 total · 700 in this make and model · 500 as pilot in command · 280 in the last 90 days · 100 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
160° at 10 knots
Visibility
10 statute miles
Lowest ceiling
9,500 ft broken
Temperature
82 °F, dew point 79 °F
Altimeter
29.88 inHg
Observed at
FLL

FAA reports on this event · 1

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

Other investigations on N142PA · 1

Matched to the same aircraft by N-number and date.