# NTSB CHI94LA260: Boeing A75N1, N44MK, Waterford, MI, July 31, 1994

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 31, 1994, 15:00 local (19:00 UTC)
- Place: Waterford, MI
- Coordinates: 42.63972, -83.410102 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.6397&lon=-83.4101&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report June 19, 1995
- Report: Approved by Office Director
- NTSB case key (mKey): 9621
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI94LA260
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/9621/pdf
- Page: https://openairdocs.org/ntsb/CHI94LA260

## Probable cause

the failure of the pilot to maintain directional control.

## 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
  - directional control - not maintained, pilot in command (cause)
  - ground loop/swerve - inadvertent

## Analysis

DURING LANDING ROLL THE PILOT LOST DIRECTIONAL CONTROL AND THE AIRPLANE GROUND LOOPED, COLLAPSING THE RIGHT MAIN LANDING GEAR. THE LANDING WAS ON RUNWAY 27L.  THE WIND WAS 230 DEGREES AT 10 KNOTS.

## Factual narrative

On July 31, 1994, about 1500 eastern daylight time, a Boeing A75N1, N44MK, sustained substantial damage when the pilot lost directional control and the airplane ground-looped during landing roll at the Oakland-Pontiac Airport, Waterford, Michigan.  The private pilot was not injured.  The personal flight originated at Oshkosh, Wisconsin.  No flight plan was filed, and visual meteorological conditions prevailed at the time.

The pilot landed on runway 27L (6200'x150').  The wind was from 230 degrees at 10 knots.  The pilot stated the airplane abruptly turned to the right and collapsed the right main landing rear during landing roll.

## Aircraft

- Registration: N44MK (not matched to a registry record)
- Reported make and model: BOEING A75N1
- Category: Airplane
- Serial number: 75-435
- Airframe hours: 2400
- Engines: CONTINENTAL W-670-6N 220 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Melvin M. Kaftan
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, May 1, 1994, 45 hours before
- Departed: OSH, OSHKOSH, WI
- Airport: PTK, Oakland Pontiac Airport, runway 27L, 6,200 × 150 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 54; private; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: rear

## Weather

- Conditions: Visual (VMC), Day
- Wind: 230° at 10 knots
- Visibility: 12 statute miles
- Lowest ceiling: 15,000 ft broken
- Temperature: 81 °F, dew point 61 °F
- Altimeter: 30.00 inHg
- Observed at: PTK

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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