# NTSB MIA83LA243: Boeing A75N1, N66524, St. Augustine, FL, September 16, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 16, 1983, 08:00 local (12:00 UTC)
- Place: St. Augustine, FL
- Coordinates: 29.890813, -81.310745 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=29.8908&lon=-81.3107&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 30943
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA83LA243
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/30943/pdf
- Page: https://openairdocs.org/ntsb/MIA83LA243

## Sequence of events

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

- Loss of control - on ground/water, maneuvering - turn to reverse direction
  - landing gear,normal brake system - leak (cause)
  - operation with known deficiencies in equipment - intentional, pilot in command (cause)
  - fluid,hydraulic - low level (cause)
  - landing gear,normal brake system - inoperative
  - directional control - not possible, pilot in command
  - ground loop/swerve - uncontrolled, pilot in command

## Analysis

ON THE PREVIOUS FLT, THE PLT NOTED THAT THE LEFT BRAKE WAS WEAKER THAN THE RIGHT BRAKE. BEFORE TAKING OFF AGAIN, HE ADDED FLUID TO THE LEFT BRAKE SYS. AFTER FLYING ABOUT 1 HR, HE RETURNED & LANDED. DURING THE LANDING ROLL, THE LEFT BRAKE FAILED TO OPERATE. SUBSEQUENTLY, THE ACFT VEERED TO THE RIGHT & THE LEFT WING & AILERON WERE DAMAGED. THE PASSENGER STATED THAT THE PLT WAS AWARE THAT THE LEFT BRAKE WAS LEAKING BEFORE THE FLT.

## Aircraft

- Registration: [N66524](https://openairdocs.org/aircraft/N66524), registered now, S/N 75-8140, built 1943 (OpenAirDocs)
- Reported make and model: BOEING A75N1
- Registry model: [Boeing A75N1(PT17)](https://openairdocs.org/model/boeing-a75n1-pt17) (registry code 1380134) (OpenAirDocs)
- Registry engine: [Continental W670 series](https://openairdocs.org/engine/continental-w670-series) (registry code 17018, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 75-8140
- Airframe hours: 2159
- Engines: CONTINENTAL W-670-6A 220 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Harold Hendry, Jr.
- Airworthiness certificate: Standard, Normal
- Airport: SGJ, St. Augustine, runway 20, 2,530 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 39; private; airplane ratings: single-engine sea, single-engine land; medical: unknown, valid medical--no waivers/lim.; flight hours: 799 total, 552 in this make and model, 4 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 330° at 5 knots
- Visibility: 7 statute miles
- Lowest ceiling: none
- Temperature: 79 °F, dew point 70 °F
- Altimeter: 30.00 inHg
- Observed at: CRG, 35 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 19830916052539A](https://openairdocs.org/incident/19830916052539A), Sep 16, 1983: Boeing A75N1, St Augustine, FL, Substantial damage. Pilot lost directional control during landing roll and aircraft ground looped. Pilot was aware of brake problem.

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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