# NTSB CHI91DEC01: Mocock Avid Amphibian, N126TT, Milford, MI, January 19, 1991

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Final report
- Date: January 19, 1991, 14:40 local (19:40 UTC)
- Place: Milford, MI
- Coordinates: 42.590705, -83.499168 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.5907&lon=-83.4992&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report December 4, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 14817
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI91DEC01
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14817/pdf
- Page: https://openairdocs.org/ntsb/CHI91DEC01

## Probable cause

THE PILOT'S FAILURE TO MAINTAIN ADEQUATE AIRSPEED DURING TAKEOFF WHICH RESULTED IN A STALL.  A FACTOR RELATED TO THE ACCIDENT WERE THE GUSTY WIND CONDITIONS.

## Sequence of events

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

- Loss of control - in flight, takeoff - initial climb
  - weather condition - gusts (contributing factor)
  - airspeed - improper, pilot in command (cause)
  - stall - inadvertent, pilot in command
- In flight collision with terrain/water, descent - uncontrolled
  - terrain condition - water,frozen

## Analysis

THE SINGLE SEAT HOMEBUILT AMPHIBIAN HAD TAKEN OFF DURING WINDY CONDITIONS. WHILE ON ITS INITIAL CLIMB, WITNESSES OBSERVED THE AIRPLANE APPROXIMATELY 200 FEET ABOVE THE GROUND WHEN IT ROLLED LEFT AND DESCENDED, AT A STEEP ANGLE, UNTIL COLLIDING WITH THE SURFACE OF AN ICE COVERED LAKE.

## Aircraft

- Registration: [N126TT](https://openairdocs.org/deregistered/N126TT-1994-05-09), registration cancelled 1994-05-09, S/N 002 (OpenAirDocs)
- Reported make and model: MOCOCK AVID AMPHIBIAN (AVID AMPHI)
- Registry model: [Mocock Ralph E AVID AMPHIBIAN](https://openairdocs.org/model/mocock-ralph-e-avid-amphibian) (registry code 9570855) (OpenAirDocs)
- Category: Airplane, amateur-built
- Engines: ROTAX 532 65 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Operator: Ralph E. Mocock
- Registered owner: Ralph E. Mocock
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, October 12, 1990, 12 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 65; commercial; airplane ratings: single-engine sea, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: front; toxicology performed; flight hours: 5,611 total, 12 in this make and model, 5,406 as pilot in command, 24 in the last 90 days, 2 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 25° at 15 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 46 °F, dew point 28 °F
- Altimeter: 29.00 inHg
- Observed at: PTK, 10 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 19910119000739A](https://openairdocs.org/incident/19910119000739A), Jan 19, 1991: Amtr AVIDFLYER, Milford, MI, Destroyed, 1 fatal. Stalled avid amphibian homebuilt on climbout from takeoff on a frozen lake.

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.