# NTSB MIA87LA007: Waco YMF, N99Y, Key West, FL, October 15, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 15, 1986, 18:48 local (22:48 UTC)
- Place: Key West, FL
- Coordinates: 24.549831, -81.779296 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=24.5498&lon=-81.7793&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 31810
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA87LA007
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/31810/pdf
- Page: https://openairdocs.org/ntsb/MIA87LA007

## Sequence of events

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

- Nose over, landing - roll
  - reason for occurrence undetermined (cause)

## Analysis

THE ACFT NOSED OVER DURING LANDING ROLL. THE PROFESSIONAL PLT STATED THAT HE WAS CERTAIN THE BRAKES WERE OFF PRIOR TO TAKEOFF AND THAT HE WAS SURE HE WAS NOT 'RIDING' THE BRAKED ON LANDING. THE PLT STATED THAT HE THOUGHT THE PARKING BRAKE MAY HAVE COME ON DURING FLT. THE BRAKES APPEARED TO FUNCTION NORMALLY AFTER THE ACCIDENT. THE REASON FOR THE NOSE OVER COULD NOT BE DETERMINED.

## Aircraft

- Registration: [N99Y](https://openairdocs.org/aircraft/N99Y), registered now, S/N F5-002, built 1986 (OpenAirDocs)
- Reported make and model: WACO YMF
- Registry model: [Waco YMF](https://openairdocs.org/model/waco-ymf) (registry code 9600411) (OpenAirDocs)
- Registry engine: [Jacobs R755B series](https://openairdocs.org/engine/jacobs-r755b-series) (registry code 35007, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: F5-002
- Airframe hours: 40
- Engines: JACOBS R-755B2M 245 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 91
- Registered owner: Conch Classic Air Tours, Inc
- Airworthiness certificate: Standard, Normal
- Airport: EYW, Key West International, runway 27, 4,800 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 57; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: rear; flight hours: 8,500 total, 38 in this make and model, 8,100 as pilot in command, 89 in the last 90 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 8 statute miles
- Lowest ceiling: 25,000 ft broken
- Temperature: 79 °F, dew point 66 °F
- Altimeter: 29.00 inHg
- Observed at: EYW

## 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 19861015048809A](https://openairdocs.org/incident/19861015048809A), Oct 15, 1986: Waco YMF, Key West, FL, Substantial damage. The aircraft flipped over on landing rollout. The cause for the occurrence is undetermined. Suspect parking brake.

## Other investigations on N99Y (3)

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 GAA16CA089](https://openairdocs.org/ntsb/GAA16CA089), Dec 25, 2015: Waco YMF (N99Y), Fullerton, CA, substantial damage. Probable cause: The pilot's failure to maintain directional control during the landing roll.
- [NTSB MIA89LA076](https://openairdocs.org/ntsb/MIA89LA076), Feb 3, 1989: Waco YMF (N99Y), Key West, FL, substantial damage. Probable cause: THE INABILITY OF THE PLT TO MAINTAIN CONTROL AFTER ENCOUNTERING HIS OWN WAKE TURBULENCE AT A LOW ALTITUDE DURING A STEEP TURNING MANEUVER.
- [NTSB MIA88LA220](https://openairdocs.org/ntsb/MIA88LA220), Jul 13, 1988: Classic YMF-5 (N99Y), Key West, FL, 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.

---
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.