# NTSB MIA92IA090: Cessna 402C, N6786C, Fort Lauderdale, FL, March 1, 1992

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: March 1, 1992, 12:09 local (17:09 UTC)
- Place: Fort Lauderdale, FL
- Coordinates: 26.090608, -80.150146 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=26.0906&lon=-80.1501&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed, report September 14, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 33008
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA92IA090
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/33008/pdf
- Page: https://openairdocs.org/ntsb/MIA92IA090

## Probable cause

IMPROPER OVERHAUL BY COMPANY MAINTENANCE PERSONNEL AND INACCURATE GEAR DOWN AND LOCKED INDICATION IN THE COCKPIT.

## Sequence of events

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

- Nose gear collapsed, landing - roll
  - gear down and locked - inaccurate (cause)
  - landing gear,nose gear - failure,total
  - maintenance,overhaul - improper, company maintenance personnel (cause)

## Analysis

THE NOSE LANDING GEAR COLLAPSED AFTER IT WAS LOWERED TO THE RWY DURING THE LANDING ROLL.  EXAM OF THE NOSE LANDING GEAR ASSY BY AN FAA MAINTENANCE INSPECTOR INDICATED THAT THE NOSE LANDING GEAR ACTUATOR WAS NOT DAMAGED. IT WAS REMOVED FOR EXAM.  DISASSEMBLY REVEALED THAT AN EXTRA PACKING (SIMILAR TO AN O-RING) WAS INSTALLED.  THIS ALLOWED THE NOSE LANDING GEAR DOWN AND LOCKED LIGHT TO ILLUMINATE BUT SHUT THE MOTOR OFF BEFORE THE NOSE LANDING GEAR WAS FULLY EXTENDED.  REVIEW OF THE AIRPLANE LOGBOOKS INDICATE THAT A PROGRESSIVE INSPECTION WAS SIGNED OFF TWO DAYS BEFORE THE ACCIDENT. DURING THE INSPECTION IT WAS NOTED THAT THE NOSE LANDING GEAR ACTUATOR SWITCH WAS LEAKING.  THE CORRECTIVE ACTION INDICATES THAT THE O-RINGS WERE REPLACED.  ACCORDING TO THE ILLUSTRATED PARTS LIST OF THE NOSE LANDING GEAR ACTUATOR, TWO PACKINGS ARE INSTALLED.  ACCORDING TO THE DIRECTOR OF MAINTENANCE, THE MECHANIC RESPONSIBLE FOR REPLACEMENT OF THE PACKINGS WAS PROVIDED WITH TWO, BUT ONLY REMOVED ONE FROM THE ACTUATOR.  THIS RESULTED IN THE EXTRA PACKING.  THE ACFT HAD ACCUMULATED 4 HRS & 6 CYCLES SINCE THE INSPECTION 2 DAYS EARLIER.

## Aircraft

- Registration: N6786C (not matched to a registry record)
- Reported make and model: CESSNA 402C
- Category: Airplane
- Serial number: 402C0413
- Airframe hours: 11498
- Engines: CONTINENTAL TSIO-520-VB 325 horsepower reciprocating
- Damage: Minor damage
- Flight: Part 135
- Operator: Airways International
- Registered owner: Johan Pat, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Continuous airworthiness, February 27, 1992, 4 hours before
- Departed: MIA, MIAMI, FL
- Airport: FLL, Ft.Lauderdale-Hollywood, runway 9, 5,276 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 55; flight engineer, commercial, airline transport; airplane ratings: multi-engine land, single-engine land, multi-engine sea, single-engine sea; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 15,000 total, 250 in this make and model, 250 in the last 90 days, 100 in the last 30 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 40° at 4 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 79 °F, dew point 57 °F
- Altimeter: 30.00 inHg
- Observed at: FLL, 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).

- [Incident 19920301014619I](https://openairdocs.org/incident/19920301014619I), Mar 1, 1992: Cessna 402C, Ft Lauderdale, FL, Minor damage. Nose gear collapsed on landing rollout. Found an extra o ring seal installed in actuator. Unable to lockdown.

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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