# NTSB CHI91LA187: Grumman American AA1C, N9688U, Lansing, KS, June 10, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 10, 1991, 13:30 local (18:30 UTC)
- Place: Lansing, KS
- Coordinates: 39.249534, -94.87973 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.2495&lon=-94.8797&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report March 24, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 15092
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI91LA187
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/15092/pdf
- Page: https://openairdocs.org/ntsb/CHI91LA187

## Probable cause

THE PILOT BECAME LOST/DISORIENTED AND ATTEMPTED A PRECAUTIONARY LANDING. FACTORS RELATED TO THE ACCIDENT WERE A LOW LEVEL OF FUEL AND SOFT TERRAIN (WHEAT FIELD CROP).

## Sequence of events

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

- Nose over, landing - roll
  - fluid,fuel - low level (contributing factor)
  - became lost/disoriented, pilot in command (cause)
  - precautionary landing - attempted, pilot in command (cause)
  - terrain condition - crop (contributing factor)
  - terrain condition - soft (contributing factor)

## Analysis

THE PILOT SAID THAT AFTER MORE THAN TWO HOURS OF CROSS COUNTRY FLIGHT, HE WAS HAVING DIFFICULTY IDENTIFYING HIS POSITION.  HE BECAME CONCERNED OVER HIS REMAINING FUEL SUPPLY AND ELECTED TO MAKE A PRECAUTIONARY LANDING ON A WHEAT FIELD.  SHORTLY AFTER TOUCHDOWN, THE NOSE WHEEL DUG IN AND THE AIRPLANE NOSED OVER.

## Aircraft

- Registration: [N9688U](https://openairdocs.org/deregistered/N9688U-2017-03-10), registration cancelled 2017-03-10, S/N AA1C0099 (OpenAirDocs)
- Reported make and model: Grumman American AA1C
- Registry model: [Grumman American Avn. AA-1C](https://openairdocs.org/model/grumman-american-avn-aa-1c) (registry code 3960100) (OpenAirDocs)
- Category: Airplane
- Serial number: AA1C0099
- Engines: LYCOMING O-235-L2C 115 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Glen R. Sanderson
- Departed: HYS, HAYS, KS
- Destination: STJ, ST. JOSEPH, MO

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 58; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; flight hours: 211 total, 75 in this make and model, 130 as pilot in command, 16 in the last 90 days, 16 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 5 statute miles
- Lowest ceiling: 3,000 ft overcast
- Temperature: -0 °F, dew point -0 °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).

- [Incident 19910610021409I](https://openairdocs.org/incident/19910610021409I), Jun 10, 1991: Gulstm AA1A, Lansing, KS, Minor damage. Pilot disoriented and elected to land in field. Nose wheel sank into mud and aircraft flipped over.

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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