# NTSB MIA88IA028: Beech 99, N6724D, Gulfport, MS, November 6, 1987

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: November 6, 1987, 17:41 local (23:41 UTC)
- Place: Gulfport, MS
- Location: 30.4073° N, 89.0701° W: Placed by OpenAirDocs at GULFPORT-BILOXI INTL (GPT), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=30.4073&lon=-89.0701&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 12 uninjured
- Status: Completed, report July 10, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 32046
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA88IA028
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/32046/pdf
- Page: https://openairdocs.org/ntsb/MIA88IA028

## Sequence of events

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

- Complete gear collapsed, landing - roll
  - hydraulic system - fatigue (cause)
  - fluid,hydraulic - loss,total (cause)
  - landing gear,normal retraction/extension assembly - failure,total
  - gear extension - not possible (cause)

## Analysis

WHILE ON A PART 135 SCHEDULED DOMESTIC PASSENGER FLT DURING FINAL APCH, THE NOSE LANDING GEAR FAILED TO FULLY EXTEND. THE PLT RECYCLED THE GEAR, BUT THE GEAR FAILED TO FULLY EXTEND. HE THEN ATTEMPTED TO LOWER THE GEAR USING THE EMERGENCY METHOD, AGAIN, WITH NEGATIVE RESULTS. THE APRCH WAS CONTINUED AND DURING TOUCHDOWN, THE COMPLETE GEAR COLLAPSED. THE ACFT THEN SLID TO A STOP & THE PASSENGERS WERE EVACUATED VIA THE EMERGENCY EXIT. POST INCIDENT EXAMINATION OF THE LANDING GEAR REVEALED THAT THE RT MAIN LANDING GEAR ACTUATOR END CAP FAILED AS A RESULT OF FATIGUE ALLOWING HYDRAULIC PRESSURE AND FLUID TO LEAK.

## Aircraft

- Registration: [N6724D](https://openairdocs.org/aircraft/N6724D), registered now, S/N U-215, built 1983 (OpenAirDocs)
- Reported make and model: BEECH 99
- Registry model: [Beech C-99](https://openairdocs.org/model/beech-c-99) (registry code 1154006) (OpenAirDocs)
- Registry engine: [Pratt & Whitney Canada PT6A-60A](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-60a) (registry code 52043, turbo-prop) (OpenAirDocs)
- Category: Airplane
- Serial number: U215
- Airframe hours: 9336
- Engines: P&W PT6A-36 575 horsepower turbo prop
- Damage: Minor damage
- Flight: Part 135
- Operator: Air New Orleans, doing business as Continental Express
- Registered owner: Beech Acceptance Corp., Inc.
- Airworthiness certificate: Standard, Normal
- Departed: MSY, NEW ORLEANS, LA
- Flight plan: IFR
- Airport: GPT, Gulfport Biloxi Regional, runway 31, 9,000 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 31; commercial, airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 3,900 total

## Weather

- Conditions: Visual (VMC), Dusk
- Wind: 320° at 3 knots
- Visibility: 6 statute miles
- Lowest ceiling: none
- Altimeter: 30.00 inHg
- Observed at: GPT

## 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 19871106071329I](https://openairdocs.org/incident/19871106071329I), Nov 6, 1987: Beech C99, Gulfport, MS, Minor damage. Nose gear could not be fully extended for landing. Right main gear actuator cracked at upper weld. Lost hydr fluid.

## Other investigations on N6724D (1)

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 MIA88IA068](https://openairdocs.org/ntsb/MIA88IA068), Dec 21, 1987: Beech 99 (N6724D), Tampa, FL, incident, minor 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.

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