# NTSB CHI86FER09: Piper PA-22-150, N5710D, Lino Lakes, MN, May 23, 1986

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Final report
- Date: May 23, 1986, 14:00 local (20:00 UTC)
- Place: Lino Lakes, MN
- Coordinates: 44.639225, -92.559547 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.6392&lon=-92.5595&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal, 1 serious
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 13325
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI86FER09
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13325/pdf
- Page: https://openairdocs.org/ntsb/CHI86FER09

## Sequence of events

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

- Loss of control - in flight, maneuvering - turn to reverse direction
  - aircraft performance,takeoff capability - deteriorated (contributing factor)
  - overconfidence in aircraft's ability, pilot in command (cause)
  - aircraft performance,turn capability - inadequate (cause)
  - aircraft weight and balance - exceeded, pilot in command (cause)
  - stall - inadvertent, pilot in command (cause)
  - maintenance,major alteration - improper, other maintenance personnel (contributing factor)
  - judgment - poor, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled
  - altitude - inadequate, pilot in command (contributing factor)
  - remedial action - not possible, pilot in command (contributing factor)

## Analysis

THIS AIRCRAFT WAS OVERLOADED ON TAKEOFF WITH EXTRA FUEL, CAMPING EQUIPMENT, A PASSENGER, AN OUTBOARD MOTOR, TOOLS AND THE LIKE.  IN ADDITION THE CENTER OF GRAVITY WAS PROBABLY OUT OF SAFE LIMITS.  AN ADDITIONAL FACTOR AFFECTING TAKEOFF AND TURN PERFORMANCE WAS A FOLDABLE BOAT ATTACHED EXTERNALLY TO THE AIRFRAME, WHICH CREATED DRAG.  WHEN THE PILOT TURNED TO ALND SHORTLY FOLLOWING THE TAKEOFF, THE AIRCRAFT STALLED INTO THE WATER. THE PILOT WAS NOT FLOATPLANE RATED AND DID NOT HAVE A CURRENT MEDICAL CERTIFICATE. THE FLOATPLANE CONFIGURATION ON THIS AIRCRAFT WAS NOT APPROVED, NOR WAS THE INSTALLATION OF A LARGER ENGINE. THE PLTS FLT TIME WAS NOT REPORTED OR AVAILABLE.

## Aircraft

- Registration: [N5710D](https://openairdocs.org/deregistered/N5710D-1988-04-18), registration cancelled 1988-04-18, S/N 224406 (OpenAirDocs)
- Reported make and model: PIPER PA-22-150
- Registry model: [Piper PA-22-150](https://openairdocs.org/model/piper-pa-22-150) (registry code 7102210) (OpenAirDocs)
- Category: Airplane
- Serial number: 22-4406
- Engines: LYCOMING O-360-AID 180 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Registered owner: Richard H. Knutson
- Airworthiness certificate: Standard, Normal
- Departed: LINO LAKES, MN
- Destination: RED LAKE ONTAR
- Airport: 8Y4, Surfside Seaplane

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 50; private; airplane ratings: single-engine land; medical: class 2, expired; seat: front; toxicology performed

## Weather

- Conditions: Visual (VMC), Day
- Wind: 150° at 7 knots
- Visibility: 15 statute miles
- Lowest ceiling: 4,000 ft broken
- Temperature: 63 °F, dew point 46 °F
- Altimeter: 30.00 inHg
- Observed at: MSP, 16 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 19860523019399A](https://openairdocs.org/incident/19860523019399A), May 23, 1986: Piper PA22150, Circle Pines, MN, Destroyed. The floatplane impacted the lake during an emergency return. Aircraft over gross weight. Pilot not properly rated.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.