# NTSB ATL89FA188: Beech 70, N11TP, Albany, GA, August 2, 1989

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: August 2, 1989, 15:16 local (19:16 UTC)
- Place: Albany, GA
- Coordinates: 31.589319, -84.210983 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=31.5893&lon=-84.2110&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 6 fatal
- Status: Completed, report April 15, 1991
- Report: Approved by Office Director
- NTSB case key (mKey): 7908
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL89FA188
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/7908/pdf
- Page: https://openairdocs.org/ntsb/ATL89FA188

## Probable cause

THE FATIGUE FAILURE OF THE SUPERCHARGER INTERMEDIATE DRIVE GEAR SHAFT (GEAR TOOTH), WHICH RESULTED IN A PARTIAL LOSS OF POWER, AND THE PILOT'S INITIATION OF LIFT-OFF BEFORE REACHING VMC AIRSPEED.  FACTORS RELATED TO THE ACCIDENT WERE:  THE WORN INTERMEDIATE DRIVE GEAR SHAFT, THE PILOT'S OPERATION OF THE AIRCRAFT ABOVE ITS MAXIMUM CERTIFIED GROSS WEIGHT LIMIT, AND THE HIGH DENSITY ALTITUDE.

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, takeoff - initial climb
  - accessory drive assy,drive gear - worn (contributing factor)
  - accessory drive assy,drive gear - fatigue (cause)
- Loss of control - in flight, takeoff - initial climb
  - aircraft weight and balance - exceeded, pilot in command (contributing factor)
  - weather condition - high density altitude (contributing factor)
  - lift-off - premature, pilot in command (cause)
  - airspeed(vmc) - not attained, pilot in command (cause)
- In flight collision with terrain/water, takeoff

## Analysis

DURING TAKEOFF, THE ACFT ROLLED ABRUPTLY TO THE RIGHT AFTER LIFT-OFF.  SUBSEQUENTLY, THE RIGHT WINGTIP STRUCK THE SURFACE, THEN THE ACFT CARTWHEELED & CRASHED. THE FUSELAGE WAS DESTROYED BY A POST-CRASH FIRE.  AN EXAM OF THE ENGS REVEALED THAT THE RIGHT ENG SUPERCHARGER INTERMEDIATE DRIVE GEAR SHAFT HAD BECOME WORN & ONE OF ITS GEAR TEETH HAD FAILED FROM FATIGUE. THERE WAS EVIDENCE THAT AN OUT-OF-MESH CONDITION OCCURRED, WHICH RESULTED IN A PARTIAL LOSS OF ENG POWER DURING TAKEOFF. ALSO, THE ACFT WAS ESTIMATED TO BE 679 LBS OVER ITS MAX CERTIFIED GROSS WEIGHT. DENSITY ALT WAS CALCULATED TO BE ABOUT 2000 FT.

## Aircraft

- Registration: [N11TP](https://openairdocs.org/deregistered/N11TP-1990-06-18), registration cancelled 1990-06-18, S/N LB12 (OpenAirDocs)
- Reported make and model: BEECH 70
- Registry model: [Beech 70](https://openairdocs.org/model/beech-70) (registry code 1152807) (OpenAirDocs)
- Category: Airplane
- Serial number: LB-12
- Airframe hours: 4310
- Engines: LYCOMING IGSO-480-A1E6 340 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Business, Part 91
- Operator: D.L. Porter Construction, Inc.
- Registered owner: Rainbow Properties, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, June 30, 1989, 10 hours before
- Destination: CAK, AKRON, OH
- Flight plan: IFR
- Airport: ABY, Southwest Georgia Rgnl, runway 34, 5,200 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 43; flight instructor, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; toxicology performed; flight hours: 5,000 total, 35 in the last 90 days, 10 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 260° at 10 knots
- Visibility: 6 statute miles
- Lowest ceiling: 10,000 ft broken
- Temperature: 91 °F, dew point 73 °F
- Altimeter: 30.00 inHg
- Observed at: ABY

## 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 19890802026719A](https://openairdocs.org/incident/19890802026719A), Aug 2, 1989: Beech 70, Albany, GA, Destroyed, 6 fatal. Over gross liftoff, lost right engine. Rolled right and crashed. Turbocharger gear fractured.

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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