# NTSB CHI84LA090: Cessna 210D, N502RF, Rockford, IL, January 19, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: January 19, 1984, 12:51 local (18:51 UTC)
- Place: Rockford, IL
- Coordinates: 42.330234, -89.010528 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.3302&lon=-89.0105&mi=10
- Phase of flight: [Unknown](https://openairdocs.org/ntsb-phases/990) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12531
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI84LA090
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12531/pdf
- Page: https://openairdocs.org/ntsb/CHI84LA090

## Sequence of events

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

- Airframe/component/system failure/malfunction, unknown
  - hydraulic system - other (cause)
  - maintenance,installation - improper, other maintenance personnel (cause)
  - emergency procedure - attempted, pilot in command
- Gear collapsed, landing - roll
  - gear extension - not possible, pilot in command

## Analysis

THE PLT WAS ON A MAINTENANCE TEST FLT TO CHECK THE LANDING GEAR HYDRAULIC POWER PAC. HE WAS UNABLE TO LOWER THE MAIN LANDING GEAR AND LANDED WITH THE NOSEWHEEL DOWN. EXAMINATION OF THE HYDRAULIC PAC AFTER THE ACCIDENT REVEALED THAT THE HYDRAULIC SYSTEM HAD NOT BEEN PROPERLY BLED & ENTRAPPED AIR, WHICH RESULTED IN AN EXTREMELY HIGH FLOW OF AIR THRU THE SECONDARY RELIEF VALVE, PREVENTING PROPER SYSTEM OPERATION.

## Aircraft

- Registration: [N502RF](https://openairdocs.org/deregistered/N502RF-2012-12-10), registration cancelled 2012-12-10, S/N 21058302, built 1964 (OpenAirDocs)
- Reported make and model: CESSNA 210D
- Registry model: [Cessna 210D](https://openairdocs.org/model/cessna-210d) (registry code 2073414) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 21058302
- Airframe hours: 4850
- Engines: CONTINENTAL IO-520-A 285 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Lawrence N. Lamb
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, September 15, 1983, 20 hours before
- Departed: 1C8, ROCKFORD, IL
- Airport: RFD, Great Rockford, runway 24, 5,000 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 40; commercial; airplane ratings: single-engine land; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 2,000 total, 100 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 230° at 7 knots
- Visibility: 12 statute miles
- Lowest ceiling: none
- Temperature: 1 °F, dew point 9 °F
- Altimeter: 30.00 inHg
- Observed at: RFD

## 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 19840119000929A](https://openairdocs.org/incident/19840119000929A), Jan 19, 1984: Cessna 210D, Rockford, IL, Substantial damage. Unable to extend main gear after installing new power pack. Improper air bleeding of system after installation.

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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