# NTSB MIA87IA256: Gates Learjet 36A, N900MD, Tyndall Afb, FL, September 21, 1987

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: September 21, 1987, 16:02 local (21:02 UTC)
- Place: Tyndall Afb, FL
- Coordinates: 30.049901, -85.550437 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=30.0499&lon=-85.5504&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report January 11, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 31804
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA87IA256
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/31804/pdf
- Page: https://openairdocs.org/ntsb/MIA87IA256

## Sequence of events

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

- Airframe/component/system failure/malfunction, takeoff - roll/run
  - landing gear,wheel - failure,partial (cause)
  - landing gear,normal brake system - failure,total
- On ground/water collision with object, takeoff - aborted
  - object - airport facility
- Overrun, takeoff - aborted

## Analysis

THE CAPTAIN ABORTED THE TAKEOFF AT 124 KTS AFTER HEARING AN EXPLOSIVE SOUND, FEELING THE AIRCRAFT SWERVE, AND SEEING DEBRIS FROM A MAIN WHEEL RIM AND BRAKE BEING THROWN FORWARD OF THE AIRCRAFT. THE AIRCRAFT CONTINUED DOWN THE RUNWAY, BARELY CONTROLLABLE AND WITHOUT WHEEL BRAKES. IT THEN COLLIDED WITH THE CAPTURE BARRIER AT THE END OF THE RUNWAY AND OVERRAN THE RUNWAY. THE OPERATOR ATTRIBUTED THE EXPLOSIVE SOUND TO FAILURE OF ONE OF THE LEFT MAIN GEAR WHEEL RIMS. A BRAKE LINE ON THE LEFT GEAR WAS SEVERED DURING THE OCCURRENCE.

## Aircraft

- Registration: N900MD (not matched to a registry record)
- Reported make and model: GATES LEARJET 36A
- Category: Airplane
- Serial number: 045
- Airframe hours: 3154
- Engines: GARRETT TFE-731-2-2B 3500 lbs thrust turbo fan
- Damage: Minor damage
- Flight: Other work use, Part 91
- Operator: Flight International, Inc.
- Registered owner: Aircraft Trading Center
- Airworthiness certificate: Standard, Normal
- Flight plan: IFR
- Airport: PAM, Tyndall Afb, runway 31L, 8,075 × 150 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 58; airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 16,000 total, 500 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 10 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 86 °F, dew point 55 °F
- Altimeter: 30.00 inHg
- Observed at: PFN, 10 nm away

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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