# NTSB DEN83LA188: Pitts Special S-1C, N22R, Hudson, CO, August 14, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 14, 1983, 13:00 local (19:00 UTC)
- Place: Hudson, CO
- Coordinates: 40.069957, -104.639251 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.0700&lon=-104.6393&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): 16135
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN83LA188
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16135/pdf
- Page: https://openairdocs.org/ntsb/DEN83LA188

## Sequence of events

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

- Nose over, landing - roll
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)
  - terrain condition - wet (contributing factor)
  - terrain condition - soft (contributing factor)
  - landing gear,wheel - foreign object
  - landing gear,wheel - movement restricted

## Analysis

AFTER ARRIVING, THE PLT LANDED THE ACFT ON A TURF RWY THAT WAS STILL WET DUE TO A HEAVY RAIN ON THE PREVIOUS DAY. DURING THE LANDING ROLL-OUT, WET GRASS & MUD ACCUMULATED IN THE MAIN WHEEL PANTS. THE PLT SAID THAT THE WHEELS SUBSEQUENTLY LOCKED UP & THE ACFT NOSED OVER. ACCORDING TO THE PLT, THE WIND WAS CALM. ABOUT 20 MI SOUTH A DENVER, THE WIND WAS FROM 130 DEG AT 7 KTS.

## Aircraft

- Registration: [N22R](https://openairdocs.org/deregistered/N22R-2011-11-29), registration cancelled 2011-11-29, S/N 1, built 1969 (OpenAirDocs)
- Reported make and model: PITTS SPECIAL S-1C (SPECIAL S-)
- Registry model: [Ralph L Page PITTS SPECIAL S-1C](https://openairdocs.org/model/ralph-l-page-pitts-special-s-1c) (registry code 72202TA) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Engines: UNKNOWN UNKNOWN reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Gilbert Geisz
- Departed: 1V5, BOULDER, CO
- Airport: 7C03, Lindys, runway 36, 3,000 × 60 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: center

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 82 °F, dew point 63 °F
- Altimeter: 30.00 inHg
- Observed at: DEN, 20 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 19830814040819A](https://openairdocs.org/incident/19830814040819A), Aug 14, 1983: Amtrpt PITTSSPECS1C, Hudson, CO, Substantial damage. Aircraft flipped inverted during landing roll on wet soft runway.

## Other investigations on N22R (2)

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 FTW93LA069](https://openairdocs.org/ntsb/FTW93LA069), Jan 15, 1993: Pitts S1C (N22R), Godley, TX, substantial damage. Probable cause: THE PARTIAL POWER LOSS DUE TO THE PILOT'S DELAYED APPLICATION OF CARBURETOR HEAT. FACTORS WERE CARBURETOR ICE, AND THE SLOPING TERRAIN
- [NTSB MKC86LA014](https://openairdocs.org/ntsb/MKC86LA014), Oct 19, 1985: Pitts S1C (N22R), Goodland, KS, substantial damage

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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