# NTSB MIA89IA247: Beech G18S, N9604R, Jackson, MS, September 13, 1989

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: September 12, 1989, 20:45 local (Sep 13, 1989, 01:45 UTC)
- Place: Jackson, MS
- Location: 32.3112° N, 90.0759° W: Placed by OpenAirDocs at JACKSON-MEDGAR WILEY EVERS INTL (JAN), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=32.3112&lon=-90.0759&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report August 26, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 32335
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA89IA247
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/32335/pdf
- Page: https://openairdocs.org/ntsb/MIA89IA247

## Probable cause

FAILURE OF THE PILOT TO CORRECTLY PERFORM THE EMERGENCY GEAR EXTENSION PROCEDURES. CONTRIBUTING TO THE ACCIDENT WAS THE FAILURE OF THE NORMAL GEAR EXTENSION SYSTEM.

## Sequence of events

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

- Gear not extended, approach - vfr pattern - final approach
  - landing gear,normal retraction/extension assembly - failure,total (contributing factor)
- Gear collapsed, landing - roll
  - checklist - not followed, pilot in command (cause)
  - emergency procedure - improper, pilot in command (cause)

## Analysis

THE PLT LOWERED THE LANDING GEAR SELECTOR HANDLE WHILE ON APCH TO LAND BUT THE GEAR DID NOT EXTEND. THE FLT DEPARTED THE ARPT TRAFFIC AREA & THE PLT ATTEMPTED TO LOWER THE GEAR VIA THE EMERGENCY EXTENSION PROCEDURES BUT WAS UNABLE. THE PLT PERFORMED A LOW APCH PAST THE TOWER FOR CONFIRMATION THAT THE GEAR WAS DOWN & WAS ADVISED THAT IT APPEARED TO BE. THE FLT RETURNED FOR LANDING & AFTER TOUCHDOWN, THE GEAR COLLAPSED. AFTER THE INCIDENT WHILE RAISING THE PLANE FROM THE RWY, THE PLT WAS ASKED TO LOWER THE GEAR VIA THE EMERGENCY METHOD BUT WAS UNABLE BECAUSE HE RELEASED THE CLUTCH WHILE CRANKING THE GEAR DOWN. THE CORRECT PROCEDURE WAS TO HOLD THE CLUTCH IN WHILE DOING SO. AN EXAM OF THE ACFT REVEALED A FAILURE OF THE DYNAMIC BRAKE RELAY. THE PURPOSE OF THE RELAY WAS TO PREVENT COASTING OF THE GEAR MOTOR & GEARS BY MOMENTARILY REVERSING THE MOTOR WHEN THE UP LIMIT WAS REACHED, BUT THE FAILURE PREVENTED IT FROM DOING SO. THE FAILED COMPONENT WAS REPLACED & THE GEAR OPERATED NORMALLY.

## Aircraft

- Registration: [N9604R](https://openairdocs.org/aircraft/N9604R), registered now, S/N BA-464, built 1959 (OpenAirDocs)
- Reported make and model: BEECH G18S
- Registry model: [Beech G18S](https://openairdocs.org/model/beech-g18s) (registry code 1151010) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: BA-464
- Engines: P&W R-985-AN-14B 450 horsepower reciprocating
- Damage: Minor damage
- Fire: On-Ground
- Flight: Part 135
- Registered owner: Jim Ratliff Air Service, Inc.
- Airworthiness certificate: Standard, Normal
- Departed: GWO, GREENWOOD, MS
- Flight plan: VFR
- Airport: JAN, Jackson Int'L, runway 15R, 8,501 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 2,350 total

## Weather

- Conditions: Visual (VMC), Not reported
- Wind: calm
- Visibility: 7 statute miles
- Lowest ceiling: none
- Temperature: 75 °F, dew point 73 °F
- Altimeter: 30.00 inHg
- Observed at: JAN

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Incident 19890913034489I](https://openairdocs.org/incident/19890913034489I), Sep 13, 1989: Beech G18S, Jackson, MS, Minor damage. Unsafe gear indication. Used manual extension. Gear collapsed landing, pilot misused manual gear.

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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