# NTSB CHI86LA134: Brantly Helicopter B-2B, N2194U, Mt Clemens, MI, April 27, 1986

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Limited investigation · Final report
- Date: April 27, 1986, 13:18 local (17:18 UTC)
- Place: Mt Clemens, MI
- Coordinates: 42.579032, -82.810485 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.5790&lon=-82.8105&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 2 serious
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 13456
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI86LA134
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13456/pdf
- Page: https://openairdocs.org/ntsb/CHI86LA134

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, descent
  - maintenance,annual inspection - not performed, company/operator management (contributing factor)
  - procedures/directives - not followed, pilot in command (contributing factor)
  - qualification, pilot in command (contributing factor)
  - maintenance,inspection - improper, other maintenance personnel (cause)
  - engine assembly,connecting rod - failure,total (cause)
- Forced landing, descent - emergency
  - autorotation - performed, pilot in command
- In flight collision with object, landing - flare/touchdown
  - terrain condition - none suitable (contributing factor)
  - object - tree(s) (contributing factor)

## Analysis

AFTER APRX 20 SUCCESSFUL TAKEOFFS & LANDINGS, THE ENG OF THE HELICOPTER LOST POWER AT ABOUT 300 FT AGL, DUE TO A #1 CONNECTING ROD FAILURE. DURING AN AUTOROTATION, THE HELICOPTER LANDED IN TREES & WAS DESTROYED. ALTHOUGH THE PILOT WAS INSTRUCTING A NEW STUDENT PILOT, HE HELD NO FAA FLYING CERTIFICATE. THE LAST ANNUAL INSPECTION OF THE HELICOPTER WAS DATED 12/2/75. A TEARDOWN OF THE ENG REVEALED DISCREPANCIES IN THE INSTALLATION OF THE #2, #3 & #4 ROD CAPS. DUE TO THE DAMAGE, PROPER INSTALLATION OF THE #1 ROD CAP COULD NOT BE VERIFIED.

## Aircraft

- Registration: [N2194U](https://openairdocs.org/deregistered/N2194U-2012-08-10), registration cancelled 2012-08-10, S/N 405, built 1964 (OpenAirDocs)
- Reported make and model: Brantly Helicopter B-2B
- Registry model: [Brantly B-2B](https://openairdocs.org/model/brantly-b-2b) (registry code 1440506) (OpenAirDocs)
- Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Serial number: 405
- Engines: LYCOMING IVO-360-A1A 200 horsepower reciprocating
- Damage: Destroyed
- Flight: Instructional, Part 91
- Registered owner: Edward C. Thomas
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, December 2, 1975, 12 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 41; seat: right; flight hours: 8 in this make and model, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 140° at 5 knots
- Visibility: 8 statute miles
- Lowest ceiling: none
- Temperature: 77 °F, dew point 57 °F
- Altimeter: 30.00 inHg
- Observed at: DET, 15 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 19860427014509A](https://openairdocs.org/incident/19860427014509A), Apr 27, 1986: Hynes B2B, Mt Clemens, MI, Destroyed. Engine connecting rod failed and aircraft struck trees during landing. Pilot had no license. Engine annual overdue.

## Other investigations on N2194U (2)

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 DEN65A0078](https://openairdocs.org/ntsb/DEN65A0078), Jun 6, 1965: Brantly B-2 (N2194U), Brighton, CO, substantial damage
- [NTSB UNK64X2647](https://openairdocs.org/ntsb/UNK64X2647), Jul 4, 1964: Brantly B2B (N2194U), Lakewood, CO, destroyed

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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