MIA08LA048

NTSB accident investigation · Grumman G-21A · Marathon, FL · January 29, 2008

Accident · Serious injuriesLimited investigationFinal report
Date
January 29, 2008, 17:23 local (22:23 UTC)
Place
Marathon, FL
Injuries
2 serious
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N21AGrumman G-21A
Defining event
Landing-flare/touchdown: Dragged wing/rotor/float/other
Weather
Visual (VMC) · Day
Status
Completed · report January 29, 2009
Report
Approved by Office Director
Parties
FAA/FSDO
FAA report
20080129831379A
Case key
67444

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

The pilot’s failure to maintain control of the airplane during a water landing.

Findings · 2

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Performance/control parametersAircraft › Aircraft oper/perf/capability · Not attained/maintainedGrumman G-21A: 1 caseAll aircraft: 1,269 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotGrumman G-21A: 3 casesAll aircraft: 9,295 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

After departing an airport and completing the checklist, the pilot proceeded to a water-work area. The pilot stated that other than that, he had no further recollection of the flight. The passenger stated that the pilot was practicing takeoffs and landings, and that during a water landing, the left wing contacted the water, and the airplane water looped. Examination of the airplane by the FAA revealed no mechanical malfunctions or failures of the airplane or engine, and none were reported by the pilot or passenger.

Factual narrative

On January 29, 2008, about 1723 eastern standard time, a Grumman G-21A, amphibian airplane N21A, impacted the ocean during landing near Marathon, Florida. The certificated airline transport pilot and passenger received serious injuries and the airplane sustained substantial damage. The flight was operated as a personal flight under the provisions of 14 Code of Federal Regulations (CFR) Part 91, and no flight plan was filed. Visual meteorological conditions prevailed at the time of the accident. The flight departed from the Florida Keys Marathon Airport (MTH) in Marathon, Florida, on January 29, 2008, about 1615.

According to the pilot he departed MTH and after take off and the checklist accomplished he proceeded in a westerly direction to inspect a water-work area. The pilot stated that other then that, he had no further recollection of the flight.

According to the Federal Aviation Administration (FAA) the passenger stated that the pilot was practicing takeoffs and landings. During a water landing, the left wing contacted the water and the airplane water looped. A Good Samaritan rescued them from the water in his boat and brought them ashore where rescue personal were waiting.

Examination of the airplane by the FAA revealed no mechanical malfunctions or failures of the airplane or engine, and none were reported by the pilot or passenger.

Aircraft

Registration
N21A
Reported as
Grumman G-21A
Category
Airplane
Serial number
B129
Airframe hours
24,456
Engines
Pratt & Whitney R985-AN-14B, 450 horsepower, reciprocatingPratt & Whitney R985-AN-14B, 450 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 1, 2007 · 38 hours before
Departed
MTH · Marathon, FL
Destination
MTH · Marathon, FL
Flight plan
Company VFR
Airport
MTH · The Florida Keys Marathon Arpt

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
58
Injuries
Serious
Certificates
Airline transport, Flight engineer, Commercial, Flight instructor
Airplane ratings
Single-engine sea, Multi-engine sea, Single-engine land, Multi-engine land
Instrument ratings
Helicopter, Airplane
Medical
Class 1, With waivers/limitations
Last flight review
September 11, 2007
Seat
Left
Flight hours
16,000 total · 100 in this make and model · 14,000 as pilot in command · 15 in the last 90 days · 15 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
140° at 9 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
73 °F, dew point 54 °F
Altimeter
30.04 inHg
Observed at
MTH

Docket · 1

The files NTSB released with the investigation on October 30, 2024, on NTSB’s docket system: statements, records, photos and specialists’ reports. 937 KB in all.

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 N21A · 1

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