# NTSB MIA86LA209: Piper PA-28R-200, N9306N, Marathon, FL, July 14, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 14, 1986, 08:21 local (12:21 UTC)
- Place: Marathon, FL
- Coordinates: 24.709678, -81.080383 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=24.7097&lon=-81.0804&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- Safety recommendations: Yes
- NTSB case key (mKey): 31673
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA86LA209
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/31673/pdf
- Page: https://openairdocs.org/ntsb/MIA86LA209

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Airframe/component/system failure/malfunction, cruise - normal
  - lubricating system,oil line - fatigue (cause)
  - maintenance,replacement - improper, other maintenance personnel (cause)
  - lubricating system,oil line - leak (cause)
  - fluid,oil - loss,total (cause)
- Loss of engine power(total) - mech failure/malf, cruise - normal
  - engine assembly,connecting rod - disconnected (contributing factor)
  - engine assembly - jammed (contributing factor)
- Ditching, landing - flare/touchdown
  - terrain condition - water,glassy

## Analysis

FLIGHT EXPERIENCED LOSS OF ENGINE OIL AND SUBSEQUENT SEIZING OF THE ENGINE AT WHICH TIME THE AIRCRAFT WAS DITCHED IN THE GULF OF MEXICO. POST CRASH EXAMINATION OF THE ENGINE REVEALED THE OIL LINE FROM THE PROPELLER GOVENOR TO THE ENGINE NOSE CASE HAD FAILED IN FATIGUE AT A BEND. TWO REQUIRED SUPPORT CLAMPS FOR THIS LINE WERE NOT INSTALLED. THE LINE HAD BEEN CHANGED 8 FLIGHT HOURS BEFORE THE FAILURE.

## Aircraft

- Registration: [N9306N](https://openairdocs.org/deregistered/N9306N-2013-05-22), registration cancelled 2013-05-22, S/N 28R-35006, built 1969 (OpenAirDocs)
- Reported make and model: PIPER PA-28R-200
- Registry model: [Piper PA-28R-200](https://openairdocs.org/model/piper-pa-28r-200) (registry code 7102811) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 28R-35006
- Airframe hours: 3280
- Engines: LYCOMING I0360-CIC 200 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Bookstein Aircraft Corporation
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, February 1, 1986, 20 hours before
- Departed: EYW, KEY WEST, FL
- Destination: FXE, FT.LAUDERDALE, FL

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 43; private; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 950 total, 450 in this make and model, 950 as pilot in command, 17 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 120° at 13 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 82 °F, dew point 73 °F
- Altimeter: 30.00 inHg
- Observed at: EYW, 39 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 (OpenAirDocs).

- [Accident 19860714037159A](https://openairdocs.org/incident/19860714037159A), Jul 14, 1986: Piper PA28R200, Marathon, FL, Destroyed. Oil spray visible on windshield before engine seized and aircraft ditched in gulf. Improper oil line installation.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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