# NTSB LAX06CA208: Cessna 210B, N9666X, Flagstaff, AZ, June 10, 2006

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Data collection · Final report
- Date: June 10, 2006, 13:32 local (20:32 UTC)
- Place: Flagstaff, AZ
- Coordinates: 35.138332, -111.671112
- Nearby events: https://openairdocs.org/map.md?lat=35.1383&lon=-111.6711&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report October 3, 2006
- Report: Approved by Office Director
- Parties: Federal Aviation Administration
- NTSB case key (mKey): 63965
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX06CA208
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/63965/pdf
- Page: https://openairdocs.org/ntsb/LAX06CA208

## Probable cause

The pilot's misjudged flare and inadequate recovery from a bounced landing, which resulted in a hard landing and a porpoise.

## Sequence of events

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

- Hard landing, landing - flare/touchdown
  - flare - misjudged, pilot in command (cause)
- On ground/water encounter with terrain/water, landing - flare/touchdown
  - recovery from bounced landing - inadequate, pilot in command (cause)
  - terrain condition - runway
  - porpoise/pilot-induced oscillation - encountered, pilot in command (cause)
- Gear collapsed, landing - flare/touchdown

## Analysis

The pilot made a hard landing resulting in a porpoise pilot induced oscillation and substantial damage to the airplane.  The pilot configured the airplane for landing at the destination airport with 30 degrees of wing flaps while maintaining an airspeed of 90 miles per hour (mph).  As the airplane touched down on the runway identifier markings (numbers) it bounced and became airborne again.  The airplane then porpoised down the runway, collapsing the nose landing gear on the third contact.  The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.

## Factual narrative

On June 10, 2006, at 1332 mountain standard time, a Cessna 210B, N9666X, experienced a hard landing and porpoised down the runway at Flagstaff Pulliam Airport, Flagstaff, Arizona.  The pilot/owner was operating the airplane under the provisions of 14 CFR Part 91.  The private pilot and one passenger were not injured; the airplane sustained substantial damage.  The personal cross-country flight departed from Phoenix Deer Valley Airport, Phoenix, Arizona, about 1240, with a planned destination of Flagstaff.  Visual meteorological conditions prevailed and a flight plan had not been filed.

In a written statement the pilot reported that he configured the airplane for landing at Flagstaff with 30 degrees of wing flaps while maintaining an airspeed of 90 miles per hour (mph).  The airplane touched down on the runway identifier markings (numbers).  Shortly thereafter, the airplane bounced off the runway surface and became airborne again.  The airplane porpoised down the runway, collapsing the nose landing gear on the third contact.  The airplane incurred damage to the firewall.

The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.

The mishap was upgraded to an accident on June 20th due to the damage found by a Federal Aviation Administration inspector.

## Aircraft

- Registration: N9666X (not matched to a registry record)
- Reported make and model: Cessna 210B
- Category: Airplane
- Serial number: 21057966
- Engines: Continental IO-470-S reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Airworthiness certificate: Standard, Normal
- Departed: DVT, Phoenix, AZ
- Destination: FLG, Flagstaff, AZ
- Airport: FLG, Flagstaff Pulliam Airport, runway 21, 6,999 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 68; private; airplane ratings: single-engine land; medical: class 3; flight hours: 724 total, 100 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 210° at 20 knots, gusting 25
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 77 °F, dew point 46 °F
- Altimeter: 30.11 inHg

## 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 20060610014339A](https://openairdocs.org/incident/20060610014339A), Jun 10, 2006: Cessna 210B, Flagstaff, AZ, Substantial damage. (-23) On may 10, 2006, at approximately 1231 MST, N9666X, a Cessna 210-B, with [privacy data omitted] performing as pilot-in-command, and [privacy data…

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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