# NTSB MIA85IA021: Piper PA-60, N79CM, Jacksonville, FL, October 30, 1984

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: October 29, 1984, 23:25 local (Oct 30, 1984, 04:25 UTC)
- Place: Jacksonville, FL
- Coordinates: 30.329128, -81.579231 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=30.3291&lon=-81.5792&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 31274
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA85IA021
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/31274/pdf
- Page: https://openairdocs.org/ntsb/MIA85IA021

## 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,main gear strut - failure,total (cause)
  - landing gear,tire - failure,total
- Loss of control - on ground/water, landing - roll
  - directional control - not possible, pilot in command
  - ground loop/swerve

## Analysis

THE ACFT SWERVED LEFT OFF THE RWY DURING THE LANDING ROLL. AN EXAM OF THE LEFT MAIN LANDING GEAR STRUT REVEALED THAT THE COLLAR HAD FAILED PERMITTING THE LOWER PORTION OF THE LANDING GEAR STRUT TO SHIFT. THE SHIFT WAS TRANSMITTED TOTHE TIRE CAUSING IT TO FAIL. ACCORDING TO A METALLURGIST'S REPORT, THE MAJOR PORTION OF THE COLLAR FRACTURE APPEARED TYPICAL OF AN OVERSTRESS SHEAR SEPARATION.

## Aircraft

- Registration: [N79CM](https://openairdocs.org/deregistered/N79CM-2013-05-09), registration cancelled 2013-05-09, S/N 60-0009, built 1968 (OpenAirDocs)
- Reported make and model: PIPER PA-60
- Registry model: [Smith AEROSTAR 600](https://openairdocs.org/model/smith-aerostar-600) (registry code 8360602) (OpenAirDocs)
- Registry engine: [Lycoming TI0-540 series](https://openairdocs.org/engine/lycoming-ti0-540-series) (registry code 41533, turbo-prop) (OpenAirDocs)
- Category: Airplane
- Serial number: 60-009
- Airframe hours: 2934
- Engines: LYCOMING IO-540-G1B5 290 horsepower reciprocating
- Damage: Minor damage
- Flight: Part 135
- Operator: Top Flight Air Service, doing business as Check Air
- Registered owner: Garnet E. Norwood
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, October 24, 1984, 16 hours before
- Departed: ORL, ORLANDO, FL
- Destination: JAX, JACKSONVILLE, FL
- Airport: JAX, Jacksonville Int'L, runway 31, 7,700 × 150 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 28; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 2,935 total, 730 in this make and model, 2,780 as pilot in command, 371 in the last 90 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Night/bright
- Wind: calm
- Visibility: 7 statute miles
- Lowest ceiling: none
- Temperature: 72 °F, dew point 72 °F
- Altimeter: 30.00 inHg
- Observed at: JAX

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Incident 19841029076299I](https://openairdocs.org/incident/19841029076299I), Oct 29, 1984: Piper PA60600, Jacksonville, FL, Minor damage. Tire blew on takeoff. Aircraft veered off runway during landing at other airport. Broken collar near scissor ear.

## Other investigations on N79CM (2)

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 MIA85LA131](https://openairdocs.org/ntsb/MIA85LA131), Mar 25, 1985: Piper Aerostar 600 (N79CM), Fort Myers, FL, substantial damage
- [NTSB MIA81FA070](https://openairdocs.org/ntsb/MIA81FA070), May 6, 1981: Aerostar 600 (N79CM), Orlando, FL, substantial damage

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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