# NTSB CHI91LA213: Piper PA-12, N7847H, Stockton, IA, July 7, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 7, 1991, 13:45 local (18:45 UTC)
- Place: Stockton, IA
- Coordinates: 41.589824, -90.849792 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.5898&lon=-90.8498&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report December 4, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 15116
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI91LA213
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/15116/pdf
- Page: https://openairdocs.org/ntsb/CHI91LA213

## Probable cause

COMPENSATION FOR WIND CONDITIONS NOT PERFORMED, WRONG RUNWAY SELECTED AND AIRCRAFT CONTROL NOT MAINTAINED BY THE PILOT.  FACTORS RELATED TO THE ACCIDENT WERE A TAILWIND/CROSSWIND COMPONENT AND A ROUGH RUNWAY.

## Sequence of events

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

- Loss of control - on ground/water, landing - roll
  - weather condition - tailwind (contributing factor)
  - weather condition - crosswind (contributing factor)
  - compensation for wind conditions - not performed, pilot in command (cause)
  - wrong runway - selected, pilot in command (cause)
  - aircraft control - not maintained, pilot in command (cause)
  - terrain condition - rough/uneven (contributing factor)
- Nose over, landing - roll

## Analysis

THE PILOT SAID THAT DURING A GLIDER TOW OPERATION HE HAD RETURNED FOR LANDING AND FAILED TO NOTICE A WIND SHIFT.  THE LANDING WAS MADE WITH A QUARTERING TAILWIND. THE PILOT STATED THE AIRPLANE CONTACTED A ROUGH SPOT IN THE RUNWAY DURING THE LANDING ROLL AND THE AIRPLANE NOSED OVER.

## Aircraft

- Registration: [N7847H](https://openairdocs.org/aircraft/N7847H), registered now, S/N 12-747, built 1946 (OpenAirDocs)
- Reported make and model: PIPER PA-12
- Registry model: [Piper PA-12](https://openairdocs.org/model/piper-pa-12) (registry code 7101202) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 12-747
- Airframe hours: 3085
- Engines: LYCOMING O-320-B3B 160 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Blackhawk Soaring Club
- Airworthiness certificate: Standard, Normal
- Last inspection: Unknown, May 15, 1991
- Airport: UNK, Stockton, runway 18, 2,300 × 80 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 61; private; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: front; flight hours: 767 total, 5 in this make and model, 496 as pilot in command, 8 in the last 90 days, 6 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 300° at 15 knots, gusting 20
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 84 °F

## 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 19910707026399A](https://openairdocs.org/incident/19910707026399A), Jul 7, 1991: Piper STCPA12, Stockton, IA, Substantial damage. Attempted to land in crosswind. Hit bump and nosed over. Was landing after glider tow. Windshift a factor.

## Other investigations on N7847H (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 MKC73DCD20](https://openairdocs.org/ntsb/MKC73DCD20), Aug 13, 1972: Piper PA-12 (N7847H), Maysville, IA, 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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