# NTSB ATL88LA129: North American T-6G, N9871C, Stockbridge, GA, April 2, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 2, 1988, 11:23 local (16:23 UTC)
- Place: Stockbridge, GA
- Coordinates: 33.539512, -84.239707 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.5395&lon=-84.2397&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report July 10, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 7729
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL88LA129
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/7729/pdf
- Page: https://openairdocs.org/ntsb/ATL88LA129

## Sequence of events

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

- Airframe/component/system failure/malfunction, landing
  - landing gear,normal brake system - binding(mechanical) (cause)
  - fluid,hydraulic - leak (cause)
- Nose over, landing - roll
  - directional control - not possible

## Analysis

THE AIRPLANE LANDED WITH THE LEFT WHEEL LOCKED, AND SUBSEQUENTLY NOSED OVER DURING THE LDG ROLL.  POST-CRASH EXAM REVEALED THAT THE LEFT WHEEL COULD NOT BE ROTATED IN THE FWD DIRECTION BY HAND, AND THAT IT COULD BE ROTATED AFT BY HAND ONLY WITH CONSIDERABLE EFFORT.  THE WHEEL REMAINED LOCKED IN THE FWD DIRECTION AFTER THE HYD BRAKE LINE WAS DISCONNECTED FROM THE LEFT BRAKE ASSY.  DISASSEMBLY OF THE BRAKE ASSY REVEALED NO EVIDENCE OF MECHANICAL FAILURE OR MALFUNCTION.  THE PLT INDICATED THAT BRAKE FLUID HAD LEAKED ONTO THE BRAKE SHOE CAUSING IT TO EXPAND AND LOCK THE WHEEL.

## Aircraft

- Registration: [N9871C](https://openairdocs.org/aircraft/N9871C), registered now, S/N 49-3030A, built 1949 (OpenAirDocs)
- Reported make and model: NORTH AMERICAN T-6G
- Registry model: [North American T-6G](https://openairdocs.org/model/north-american-t-6g) (registry code 6400432) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 49-3030A
- Airframe hours: 6043
- Engines: P&W R-1340 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Hinton, Jr. Zack B.
- Airworthiness certificate: Standard, Aerobatic
- Last inspection: Annual, December 5, 1987, 10 hours before
- Departed: 4A0
- Airport: 4A0, Berry Hill, runway 29, 3,000 × 40 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 30; commercial, private; airplane ratings: single-engine land, multi-engine land, single-engine sea; medical: class 2, valid medical--no waivers/lim.; flight hours: 3,500 total, 255 in this make and model, 3,400 as pilot in command, 50 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 64 °F

## 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 19880402053409A](https://openairdocs.org/incident/19880402053409A), Apr 2, 1988: Namer T6G, Stockbridge, GA, Substantial damage. Nosed over on landing. Brake cylinder leaked fluid on brake lining causing a lock up.

## Other investigations on N9871C (1)

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.

- [NTSB ATL90FA158](https://openairdocs.org/ntsb/ATL90FA158), Aug 11, 1990: North American T-6G (N9871C), Locust Grove, GA, destroyed, 2 fatal. Probable cause: THE PILOT-IN-COMMAND'S FAILURE TO MAINTAIN AIRCRAFT CONTROL DURING MANEUVERING FLIGHT, ALLOWING THE AIRPLANE TO STALL WITHOUT SUFFICIENT ALTITUDE FOR RECOVERY.

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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