# NTSB CHI86LA021: Eagle DW-1, N8807Z, Bangor, MI, October 30, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 30, 1985, 14:30 local (19:30 UTC)
- Place: Bangor, MI
- Coordinates: 42.309101, -86.110343 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.3091&lon=-86.1103&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 13379
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI86LA021
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13379/pdf
- Page: https://openairdocs.org/ntsb/CHI86LA021

## Sequence of events

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

- Airframe/component/system failure/malfunction, landing - roll
  - landing gear,normal brake system - pressure excessive (cause)
- Loss of control - on ground/water, landing - roll
- Nose over, landing - roll

## Analysis

THE ACFT NOSED OVER AFTER LANDING ON A GRASS LANDING STRIP. THE PILOT STATED THE TAIL CAME UP AND THE AIRCRAFT FLIPPED OVER ON ITS BACK AFTER LEFT BRAKE WAS APPLIED. AN EXAMINATION OF THE LANDING GEAR AND BRAKES REVEALED THAT THE RIGHT BRAKE WAS RELEASED BUT THE LEFT BRAKE WAS STILL APPLIED AND THE LEFT WHEEL LOCKED. THE LEFT BRAKE LINE WAS BLED REDUCING PRESSURE AND RELEASING THE LEFT BRAKE. EXAMINATION OF OF THE MASTER BRAKE CYLINDER REVEALED THAT THE CHECK VALUE SPRING DID NOT RELEASE ON THE LEFT SIDE WHEN BRAKE PEDAL PRESSURE WAS REMOVED.

## Aircraft

- Registration: [N8807Z](https://openairdocs.org/aircraft/N8807Z), registered now, S/N DW-1-0049-81, built 1981 (OpenAirDocs)
- Reported make and model: Eagle Aircraft Co. DW-1
- Registry model: [Eagle Aircraft Co.-Bellanca EAGLE DW-1](https://openairdocs.org/model/eagle-aircraft-co-bellanca-eagle-dw-1) (registry code 3230202) (OpenAirDocs)
- Registry engine: [Lycoming IO-540 series](https://openairdocs.org/engine/lycoming-io-540-series) (registry code 41530, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: DW-0049-81
- Airframe hours: 477
- Engines: LYCOMING IO-540 M185D 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Michael Scott Dornan
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: 100 hour, May 13, 1985, 85 hours before
- Airport: RLA, Bangor Private

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 29; flight instructor, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 3,842 total, 39 in this make and model, 3,686 as pilot in command, 100 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 7 knots, gusting 10
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 55 °F, dew point -0 °F
- Altimeter: 30.00 inHg

## 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 19851030058299A](https://openairdocs.org/incident/19851030058299A), Oct 30, 1985: Eagle DW1, Bangor, MI, Substantial damage. Applied full left brake to stop drift on landing. Master cylinder check valve spring did not release, locked brake.

## Other investigations on N8807Z (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 CHI86FEM05](https://openairdocs.org/ntsb/CHI86FEM05), May 23, 1986: Eagle DW-1 (N8807Z), Baroda, MI, substantial damage
- [NTSB FTW82DA319](https://openairdocs.org/ntsb/FTW82DA319), Aug 8, 1982: Eagle DW-1 (N8807Z), Cheneyville, LA, substantial damage

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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