# NTSB MIA83LA130: Globe GC1B, N81MA, Miami, FL, April 25, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 25, 1983, 12:35 local (16:35 UTC)
- Place: Miami, FL
- Coordinates: 25.760183, -80.309165 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=25.7602&lon=-80.3092&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 30880
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA83LA130
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/30880/pdf
- Page: https://openairdocs.org/ntsb/MIA83LA130

## Sequence of events

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

- Airframe/component/system failure/malfunction, taxi - from landing
  - landing gear,normal brake system - failure,total (cause)
- Loss of control - on ground/water, taxi - from landing
  - directional control - not possible, pilot in command (contributing factor)
  - ground loop/swerve - uncontrolled, pilot in command (contributing factor)
- Main gear collapsed, taxi - from landing
  - landing gear,main gear attachment - inadequate (cause)
  - landing gear,main gear attachment - improper (cause)
  - maintenance,replacement - improper, other person (cause)
  - acft/equip,inadequate aircraft component, other person (cause)

## Analysis

THE ACFT GROUNDLOOPED AND COLLAPSED THE LANDING GEAR AFTER THE RT BRAKE FAILED DURING TAXI FROM LANDING. THE PILOT SAID HE HAD INSTALLED NEW BRAKE PADS AND HAD SPENT TIME TAXIING TO WEAR THEM IN. AFTER COMPLETING ONE TAKEOFF AND LANDING THEACFT WAS BEING TAXIED TO THE RAMP WHEN THE RT BRAKE LOST PRESSURE. THE PILOT STATES THAT THE CAUSE OF THE BRAKE FAILURE WAS THE MASTER CYLINDER. THE LANDING GEAR SHOULD HAVE STOOD THE LOAD OF A GROUND LOOP. THE FAILURE WAS THE RESULT OF REPLACEMENT SIDE BRACES WHICH APPEAR TO BE HOME MADE. THE ORIGINAL BRACES WERE SOLID ONE PIECE CASTINGS. THE BRACES IN USE WERE TWO PIECES WELDED TOGETHER. THE BRACES FAILED AT THE WELDS. THE PILOT DOES NOT KNOW THE ORIGIN OF THE BRACES. THEY WERE ON THE ACFT WHEN HE BOUGHT IT. THE ACFT IS 1946 VINTAGE AND MANY PARTS ARE NO LONGER AVAILABLE.

## Aircraft

- Registration: [N81MA](https://openairdocs.org/aircraft/N81MA), registered now, S/N 1183, built 1946 (OpenAirDocs)
- Reported make and model: GLOBE GC1B
- Registry model: [Globe GC-1B](https://openairdocs.org/model/globe-gc-1b) (registry code 9230104) (OpenAirDocs)
- Registry engine: [Continental IO-360 series](https://openairdocs.org/engine/continental-io-360-series) (registry code 17045, 4 cycle) (OpenAirDocs)
- Category: Airplane
- Serial number: 1183
- Airframe hours: 2000
- Engines: LYCOMING IO-360-B1E 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Manual Alen Jr.
- Last inspection: Annual, January 25, 1983, 29 hours before
- Airport: TMB, Tamiami

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 572 total, 181 in this make and model, 399 as pilot in command, 8 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 280° at 12 knots
- Visibility: 8 statute miles
- Lowest ceiling: none
- Temperature: 73 °F, dew point 54 °F
- Altimeter: 29.00 inHg
- Observed at: TMB

## 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 19830425018809A](https://openairdocs.org/incident/19830425018809A), Apr 25, 1983: Univac GC1B, Miami, FL, Substantial damage. Lost brake pressure on rollout from a brake test flight. Landing gear collapsed on ground loop. Bogus side braces.

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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