# NTSB ATL91LA144: Beech C24R, N6713P, Morrisville, NC, July 28, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 28, 1991, 18:15 local (22:15 UTC)
- Place: Morrisville, NC
- Coordinates: 35.829711, -78.829589 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=35.8297&lon=-78.8296&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report December 4, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 8445
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL91LA144
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/8445/pdf
- Page: https://openairdocs.org/ntsb/ATL91LA144

## Probable cause

FAILURE OF THE LEFT MAIN LANDING GEAR UPLOCK CYLINDER WHICH PRECLUDED EXTENSION OF THE LANDING GEAR.

## Sequence of events

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

- Airframe/component/system failure/malfunction, approach
  - landing gear,gear locking mechanism - jammed (cause)

## Analysis

THE PILOT WAS UNABLE TO EXTEND THE LEFT MAIN LANDING GEAR. AFTER ABOUT 40 MINUTES OF CIRCLING TO REDUCE THE FUEL IN THE AIRPLANE, AN INTENTIONAL GEAR UP LANDING WAS MADE. SUBSEQUENT EXAMINATION OF THE LANDING GEAR REVEALED THAT THE LEFT UPLOCK CYLINDER  HAD FAILED INTERNALLY. THE FAILURE PRECLUDED MOVEMENT OF THE UPLOCK CYLINDER AND EXTENSION OF THE LEFT MAIN WHEEL.

## Aircraft

- Registration: [N6713P](https://openairdocs.org/deregistered/N6713P-2013-02-13), registration cancelled 2013-02-13, S/N MC-713, built 1979 (OpenAirDocs)
- Reported make and model: BEECH C24R
- Registry model: [Beech C24R](https://openairdocs.org/model/beech-c24r) (registry code 1151254) (OpenAirDocs)
- Registry engine: [Lycoming I0360 SER A&C](https://openairdocs.org/engine/lycoming-i0360-ser-a-c) (registry code 41511, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: MC713
- Airframe hours: 1509
- Engines: LYCOMING IO-360-A1B6 200 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Business Insurance Mgmt., Inc.
- Registered owner: Business Insurance Mgmt., Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, November 28, 1990, 19 hours before
- Departed: 4W3, FUQUAY, NC
- Airport: RDU, Raleigh-Durham Int'L, runway 32, 4,498 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 49; flight instructor, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 1,176 total, 214 in this make and model, 1,040 as pilot in command, 166 in the last 90 days, 53 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 10 knots
- Visibility: 3 statute miles
- Lowest ceiling: 1,800 ft broken
- Temperature: 79 °F, dew point 72 °F
- Altimeter: 30.00 inHg
- Observed at: RDU, 1 nm away

## 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 19910728033399A](https://openairdocs.org/incident/19910728033399A), Jul 28, 1991: Beech C24R, Raleigh-Durham, NC, Substantial damage. Unable to extend left main gear. Landed gear up. Left uplock cylinder failed internally inlocked position.

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.