# NTSB LAX90LA120: Cessna 414, N711AG, Ramona, CA, March 16, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: March 16, 1990, 14:40 local (22:40 UTC)
- Place: Ramona, CA
- Coordinates: 33.07093, -116.82994 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.0709&lon=-116.8299&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report March 12, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 26757
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX90LA120
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/26757/pdf
- Page: https://openairdocs.org/ntsb/LAX90LA120

## Probable cause

RIGHT MAIN GEAR SCISSORS ASSEMLBY BECOMING DISCONNECTED DURING LANDING ROLL, ALLOWING THE RIGHT RUN LANDING GEAR TO COLLAPSE; SCISSOR ASSEMBLY WASHERS NOT BEING REPLACED AS RECOMMENDED IN CESSNA AIRCRAFT SERVICE BULLETIN ME83-37..

## Sequence of events

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

- Main gear collapsed, landing - roll
  - landing gear,main gear strut scissors - disconnected (cause)
  - maintenance,service bulletin/letter - not performed, other person (cause)

## Analysis

THE PILOT REPORTED THAT THE AIRCRAFT LANDED NORMALLY AND DURING THE LANDING ROLL A LOUD 'BANG' WAS HEARD AND THE RIGHT MAIN LANDING GEAR COLLAPSED. AN INVESTIGATION WAS CONDUCTED BY AN FAA AIRWORTHINESS INSPECTOR. DURING THIS INVESTIGATION, IT WAS NOTED THAT A WASHER IN THE RIGHT MAIN LANDING GEAR ASSEMBLY FAILED. SUBSEQUENT INVESTIGATION, INCLUDING A REVIEW OF THE AIRCRAFT MAINTENANCE RECORDS, REVEALED THAT CESSNA AIRCRAFT SERVICE INFORMATION LETTER NUMBER ME83-37, DATED NOVEMBER 23, 1983 HAD NOT BEEN COMPLIED WITH. THIS SERVICE LETTER RECOMMENDED REPLACEMENT OF THE ORIGINAL WASHERS WITH A NEW WASHER, CESSNA PART NUMBER S1450-5H12-063. (OLD PART NUMBER 5045018-2)

## Aircraft

- Registration: [N711AG](https://openairdocs.org/deregistered/N711AG-2012-05-07), registration cancelled 2012-05-07, S/N 414-0016, built 1970 (OpenAirDocs)
- Reported make and model: CESSNA 414
- Registry model: [Cessna 414](https://openairdocs.org/model/cessna-414) (registry code 2075908) (OpenAirDocs)
- Registry engine: [Lycoming IO-720 series](https://openairdocs.org/engine/lycoming-io-720-series) (registry code 41546, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 414-0016
- Engines: LYCOMING IO-720-1BD 400 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Operator: Greco, Alexander A
- Departed: CRQ, CARLSBAD, CA
- Airport: L39, Ramona Airport, runway 9, 4,000 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 46; commercial; airplane ratings: multi-engine land, single-engine sea, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; flight hours: 2,300 total, 50 in this make and model, 2,000 as pilot in command, 71 in the last 90 days, 35 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: -0 °F, dew point -0 °F

## 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 19900316004709A](https://openairdocs.org/incident/19900316004709A), Mar 16, 1990: Cessna 414, Ramona, CA, Destroyed. Right main gear scissors torque link failed caused gear collapse and a slide off runway. AD on washers not done.

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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