# NTSB MIA88IA068: Beech 99, N6724D, Tampa, FL, December 21, 1987

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: December 20, 1987, 22:02 local (Dec 21, 1987, 03:02 UTC)
- Place: Tampa, FL
- Coordinates: 27.939758, -82.379402 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=27.9398&lon=-82.3794&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 5 uninjured
- Status: Completed, report July 10, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 32050
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA88IA068
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/32050/pdf
- Page: https://openairdocs.org/ntsb/MIA88IA068

## 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 - disabled (cause)
  - hydraulic system,fitting - fatigue (cause)
  - hydraulic system - leak (cause)
  - acft/equip,inadequate design, manufacturer (contributing factor)
- In flight collision with terrain/water, landing - flare/touchdown

## Analysis

THE COMMUTER AIR CARRIER CREW RECEIVED AN UNSAFE NOSE GEAR INDICATION ON FINAL APPROACH. THE APPROACH WAS ABANDONED AND ALL EFFORTS TO USE THE EMERGENCY EXTENSION PROCEDURES WERE TO NO AVAIL. THE CREW SECURED BOTH ENGINES ON FINAL AND LANDED NOSE GEAR UP. EXAMINATION REVEALED THAT ALL HYDRAULIC PRESURE WAS LOST DUE TO A RIGHT MAIN LANDING GEAR ACTUATOR END CAP FAILING IN FATIGUE.

## 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
- Engines: P&W PT6 680 horsepower turbo prop
- Damage: Minor damage
- Flight: Part 135
- Operator: Air New Orleans
- Registered owner: Air New Orleans
- Airworthiness certificate: Standard, Normal
- Departed: PFN, PANAMA CITY, FL
- Flight plan: IFR
- Airport: TPA, Tampa Intl., runway 9, 7,000 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; airline transport, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 5,200 total, 180 in the last 90 days

## Weather

- Conditions: Visual (VMC), Night/dark
- Wind: 120° at 6 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 66 °F, dew point 61 °F
- Altimeter: 30.00 inHg
- Observed at: TPA

## 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 19871220070729I](https://openairdocs.org/incident/19871220070729I), Dec 20, 1987: Beech C99, Tampa, FL, Minor damage. Unable to extend nose gear. Landed with mains only. Hydraulic end actuator cap on left main cracked in fatigue.

## 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 MIA88IA028](https://openairdocs.org/ntsb/MIA88IA028), Nov 6, 1987: Beech 99 (N6724D), Gulfport, MS, 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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