# NTSB CHI86LA175: Piper PA-28R-201, N31588, Chicago, IL, July 14, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 14, 1986, 12:00 local (17:00 UTC)
- Place: Chicago, IL
- Coordinates: 41.840541, -87.620742 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.8405&lon=-87.6207&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): 13488
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI86LA175
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13488/pdf
- Page: https://openairdocs.org/ntsb/CHI86LA175

## Sequence of events

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

- Main gear collapsed, landing - roll
  - landing gear,normal retraction/extension assembly - failure,partial (cause)
  - fluid,hydraulic - loose
  - gear down and locked - not possible, pilot in command

## Analysis

THE PILOT WAS UNABLE TO GET A DOWN AND LOCKED INDICATION FOR THE LEFT MAIN GEAR AND UPON TOUCHDOWN THE LEFT GEAR COLLAPSED. INSPECTION REVEALED AN INTERNAL FAILURE OF THE LEFT MAIN ACTUATOR. THE FLUID HAD LEAKED PAST THE O-RINGS AND PREVENTED THE GEAR FROM BEING LOCKED IN THE DOWN POSITION.

## Aircraft

- Registration: [N31588](https://openairdocs.org/deregistered/N31588-2010-12-01), registration cancelled 2010-12-01, S/N 28R-7837238, built 1978 (OpenAirDocs)
- Reported make and model: PIPER PA-28R-201
- Registry model: [Piper PA-28R-201](https://openairdocs.org/model/piper-pa-28r-201) (registry code 7102816) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 28R7837238
- Airframe hours: 2314
- Engines: LYCOMING IO-360-C1C6 200 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: James B. Gillespie
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, March 1, 1986
- Departed: 016, PERU, IL
- Airport: CGX, Meigs, runway 36, 3,948 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 53; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 839 total, 293 in this make and model, 675 as pilot in command, 68 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 80° at 10 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 75 °F, dew point 64 °F
- Altimeter: 30.00 inHg
- Observed at: CHI, 25 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 19860714036429A](https://openairdocs.org/incident/19860714036429A), Jul 14, 1986: Piper PA28R201, Chicago, IL, Substantial damage. The aircraft landed with one wheel not locked down. A leaking o ring in the actuator prevented gear extension.

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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