# NTSB CHI89LA136: Cessna 335, N2706T, Pontiac, MI, July 14, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 14, 1989, 14:45 local (18:45 UTC)
- Place: Pontiac, MI
- Location: 42.6656° N, 83.4205° W: Placed by OpenAirDocs at OAKLAND COUNTY INTL (PTK), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.6656&lon=-83.4205&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report March 25, 1991
- Report: Approved by Office Director
- NTSB case key (mKey): 14382
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI89LA136
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14382/pdf
- Page: https://openairdocs.org/ntsb/CHI89LA136

## Probable cause

FAILURE OF THE RIGHT MAIN LANDING GEAR EXTENSION/RETRACTION COMPONENT RESULTING FROM UNACCEPTABLE LOADS INCURRED DUE TO IMPROPER ADJUSTMENT.

## Sequence of events

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

- Airframe/component/system failure/malfunction, landing - roll
  - landing gear,normal retraction/extension assembly - failure,total (cause)
  - maintenance,adjustment - improper, other maintenance personnel (cause)

## Aircraft

- Registration: [N2706T](https://openairdocs.org/aircraft/N2706T), registered now, S/N 335-0017, built 1979 (OpenAirDocs)
- Reported make and model: CESSNA 335
- Registry model: [Cessna 335](https://openairdocs.org/model/cessna-335) (registry code 2075601) (OpenAirDocs)
- Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 3350017
- Airframe hours: 1066
- Engines: CONTINENTAL TSIO-520-EB 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Robert Byrne
- Registered owner: Robert F Byrne
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, January 9, 1988, 92 hours before
- Departed: DET, DETROIT, MI
- Flight plan: VFR
- Airport: PTK, Oakland Pontiac, runway 27L, 6,250 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 67; private; airplane ratings: multi-engine land, single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 4,000 total, 1,052 in this make and model, 3,900 as pilot in command, 30 in the last 90 days, 6 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 10 knots
- Visibility: 7 statute miles
- Lowest ceiling: 6,000 ft broken
- Temperature: 73 °F, dew point 48 °F
- Altimeter: 30.00 inHg
- Observed at: PTK

## 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 19890714022559A](https://openairdocs.org/incident/19890714022559A), Jul 14, 1989: Cessna 335, Pontiac, MI, Substantial damage. Right main gear collapsed on landing roll. First flight after repair same gear. Gear lock failed. Loose jamb nut.

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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