# NTSB MIA90LA056: Cessna 404, N335GP, Boca Raton, FL, January 17, 1990

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: January 17, 1990, 00:09 local (05:09 UTC)
- Place: Boca Raton, FL
- Coordinates: 26.339653, -80.080078 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=26.3397&lon=-80.0801&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 3 minor
- Status: Completed, report September 10, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 32617
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA90LA056
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/32617/pdf
- Page: https://openairdocs.org/ntsb/MIA90LA056

## Probable cause

LOSS OF POWER IN THE RIGHT ENGINE DUE TO A DISCONNECTED DUCT BETWEEN THE TURBOCHARGER AND THE PLENUM CHAMBER.  THE REASON FOR THE LOSS OF POWER IN THE LEFT ENGINE WAS NOT DETERMINED.

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, approach
  - 1 engine
  - ram/induction air - disconnected (cause)
- Loss of engine power(total) - nonmechanical, maneuvering - turn to landing area (emergency)
  - 1 engine
  - reason for occurrence undetermined (cause)
- Forced landing, descent - emergency
- In flight collision with object, landing - flare/touchdown
  - object - bridge/overpass

## Analysis

WHILE LEVEL AFTER DESCENDING, THE RT ENG QUIT. PLT FEATHERED THE PROP, ADVISED ATC, & WAS DIVERTING TO ALTERNATE WHEN LT ENG QUIT. HE POSITIONED THE LT ENG BOOST PUMP TO HIGH & LOW WITH NEGATIVE RESULTS, BUT DID NOT FEATHER THE PROP. POSITION OF BOOST PUMPS, WHEN ENGS QUIT, WAS NOT DETERMINED. ACFT LANDED ON OVERPASS THAT WAS UNDER CONSTRUCTION. THERE WAS FUEL LEAKAGE AFTER ACCIDENT DUE TO ACFT DAMAGE. FUEL QUANTITY WAS SUFFICIENT. EXAM OF ACFT REVEALED RT ENG FLEXIBLE DUCT FROM TURBOCHARGER TO PLENUM CHAMBER SEPARATED DUE TO LOOSE CLAMP. HOSE WAS INSTALLED & CLUB PROP INSTALLED FOR EACH ENG RUN. BOTH ENGS OPERATED NORMALLY. INDUCTION AIR HOSE WAS PULLED DURING RT ENG RUN. ENG RAN ROUGH DUE TO EXCESSIVE RICH MIXTURE. NO DETERMINATION COULD BE MADE FOR THE REASON OF THE LEFT ENG POWER LOSS.

## Aircraft

- Registration: [N335GP](https://openairdocs.org/deregistered/N335GP-2015-05-04), registration cancelled 2015-05-04, S/N 404-0009, built 1976 (OpenAirDocs)
- Reported make and model: CESSNA 404
- Registry model: [Cessna 404](https://openairdocs.org/model/cessna-404) (registry code 2075901) (OpenAirDocs)
- Registry engine: [Continental GTSI0-520-F-K](https://openairdocs.org/engine/continental-gtsi0-520-f-k) (registry code 17031, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 404-0009
- Airframe hours: 3286
- Engines: CONTINENTAL GTSIO-520-M 375 horsepower reciprocating
- Damage: Substantial damage
- Flight: Ferry, Part 91
- Registered owner: Titan 404, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, August 10, 1989, 46 hours before
- Departed: ILG, WILMINGTON, DE
- Destination: FLL, FORT LAUDERDALE, FL
- Flight plan: IFR
- Airport: BCT, Boca Raton

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 1,487 total, 35 in this make and model, 1,216 as pilot in command, 225 in the last 90 days, 105 in the last 30 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Night/bright
- Wind: 250° at 11 knots, gusting 11
- Visibility: 10 statute miles
- Lowest ceiling: 4,000 ft overcast
- Temperature: 73 °F, dew point 63 °F
- Altimeter: 30.00 inHg
- Observed at: FLL, 19 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 19900117001149A](https://openairdocs.org/incident/19900117001149A), Jan 17, 1990: Cessna 404CESSNA, Baco Raton, FL, Substantial damage. Lost power right engine. Feathered then lost left engine. Turbo duct off. Ferry permit expired.

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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