MIA85IA155

NTSB incident investigation · Grumman G-73-T · St. Croix · April 24, 1985

Incident · Minor injuriesIncident investigationFinal report
Date
April 24, 1985, 17:32 local (21:32 UTC)
Place
St. Croix
Injuries
1 minor, 5 uninjured
Damage
Minor damage
Phase of flight
Takeoff
Aircraft
N632SSGrumman G-73-T
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19850424061969I
Case key
31286

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.

Airframe/component/system failure/malfunctionTakeoff - roll/run
Propeller system/accessories,counterweight - failure,totalCause

Analysis

While on an FAA observed proving flight, water take off, the left propeller electrical terminal failed. The part then penetrated the left forward passenger window and struck the FAA observer causing minor injury. The plastic part failed in over load due to inadequate design.

Aircraft

Registration
N632SS
Reported as
Grumman G-73-T
Category
Airplane
Serial number
J-32
Airframe hours
212
Engine
P&W PT-6A34, 750 horsepower, turbo prop
Damage
Minor damage
Flight
Part 91
Registered owner
Virgin Island Seaplane Shuttle
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 2, 1985 · 41 hours before
Departed
STX · Christiansted
Destination
STT · St.Thomas
Flight plan
VFR

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
59
Certificate
Airline transport
Airplane ratings
Multi-engine sea, Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
13,155 total · 35 in this make and model · 11,775 as pilot in command · 55 in the last 90 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
15 statute miles
Lowest ceiling
None
Altimeter
29.00 inHg
Observed at
STX, 13 nm away

FAA reports on this event · 1

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