# NTSB LAX92LA009: Cessna 210, N9517T, Riverside, CA, October 6, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 5, 1991, 17:15 local (Oct 6, 1991, 00:15 UTC)
- Place: Riverside, CA
- Coordinates: 33.900089, -117.400573 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.9001&lon=-117.4006&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report May 26, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 27472
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX92LA009
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/27472/pdf
- Page: https://openairdocs.org/ntsb/LAX92LA009

## Probable cause

THE FAILURE OF A HYDRAULIC GEAR RETURN LINE, WHICH CAUSED THE AIRCRAFT'S MAIN LANDING GEAR TO COLLAPSE DURING LANDING TOUCHDOWN.

## Sequence of events

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

- Main gear collapsed, landing - flare/touchdown
  - hydraulic system,line - ruptured (cause)
  - landing gear,main gear - collapsed
- On ground/water encounter with terrain/water, landing - flare/touchdown

## Analysis

SHORTLY AFTER TAKEOFF AFTER ATTEMPTING TO RETRACT THE LANDING GEAR, THE PILOT NOTED AN UNSAFE GEAR INDICATION.  THE PILOT ESTABLISHED COMMUNICATIONS WITH CONTROL TOWER PERSONNEL AT A LARGER, NEARBY AIRPORT. HE REPORTED THE PROBLEM TO TOWER PERSONNEL AND REQUESTED LANDING INSTRUCTIONS.  THE PILOT WAS CLEARED TO LAND.  UPON TOUCHDOWN, THE MAIN LANDING GEAR COLLAPSED CAUSING THE AIRCRAFT TO COLLIDE WITH THE RUNWAY. POST-ACCIDENT EXAMINATION REVEALED THAT A HYDRAULIC GEAR RETURN LINE, CESSNA AIRCRAFT PART NUMBER 1280106-5, HAD RUPTURED.  THE LINE WAS NOTED AS BEING 'BRITTLE.'  LOG BOOK ENTRIES INDICATE THE LINE WAS INSTALLED ON THE AIRCRAFT ON JULY 19, 1991.

## Aircraft

- Registration: [N9517T](https://openairdocs.org/aircraft/N9517T), registered now, S/N 57317, built 1960 (OpenAirDocs)
- Reported make and model: CESSNA 210
- Registry model: [Cessna 210](https://openairdocs.org/model/cessna-210) (registry code 2073402) (OpenAirDocs)
- Registry engine: [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series) (registry code 17027, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 57317
- Airframe hours: 2594
- Engines: CONTINENTAL IO-470-E 260 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Clark C. Baxter
- Registered owner: Clark C. Baxter
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, September 1, 1990, 35 hours before
- Departed: RIR, RIVERSIDE, CA
- Airport: RAL, Riverside, runway 27, 5,400 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 69; private; airplane ratings: single-engine land, multi-engine land; medical: class 3, valid medical--w/ waivers/lim; flight hours: 5,000 total, 12 in this make and model

## Weather

- Conditions: Instrument (IMC), Day
- Wind: 280° at 13 knots
- Visibility: 2 statute miles
- Lowest ceiling: none
- Temperature: 90 °F
- Altimeter: 29.00 inHg
- Observed at: RAL, 1 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 19911005045189A](https://openairdocs.org/incident/19911005045189A), Oct 5, 1991: Cessna 210, Riverside, CA, Substantial damage. Nose gear hydraulic hose ruptured on retraction. Landing gear collapsed on landing. Hose replaced three months prior

## Other investigations on N9517T (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 WPR26LA335](https://openairdocs.org/ntsb/WPR26LA335), Sep 10, 2026: Cessna 210 (N9517T), Polson, MT, substantial damage, investigation ongoing

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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