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Atlas / NTSB / LAX89FA160

NTSB CAROL · Event

Event LAX89FA160

1989-04-14 SANTA ANA, California, United States Airport · SNA Minor 1 aircraft Status: Completed

Registry · N1168U

FAA Aircraft Registry record.

Make / Model

SIKORSKY S-58ET

Year of manufacture

1958 · 31 years old at event

TCDS

1H11 · CALIFORNIA HELICOPTER AIRWAYS INC

Engine

P&W CANADA PT6T-6 (925 hp)

Seats / Engines

14 seats · 1 engine

Last airworthiness date

20030529

ADS-B equipped

Yes — Mode-S A04600

Registrant of record

HELI-FLITE INC

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

FAILURE OF THE LANDING GEAR RESULTING FROM EXCESSIVE LOADING DURING GROUND OPERATIONS, AND FATIGUE CRACKING.

Factual narrative

AFTER THE CARGO WAS LOADED, AND AS THE PILOT GROUND TAXIED OVER A CONCRETE DRAINAGE DEPRESSION IN THE RAMP, THE LEFT MAIN LANDING GEAR SEPARATED FROM THE GEAR TUBE AND THE HELICOPTER ROLLED OVER. METALLURGICAL EXAMINATION OF THE FAILED LANDING GEAR STRUT REVEALED PRE-EXISTING FATIGUE CRACKS IN THE INSIDE THE GEAR LEG EXTENDING FROM MULTIPLE ORIGINS. IN ADDITION, THERE WAS CORROSION PITTING AND REMNANT TOOLING MARKS ON THE SURFACE FINISH OF THE LOWER GEAR TUBE INSIDE DIAMETER. THE PITTED AND CORRODED CONDITION OF THE TUBE INSIDE DIAMETER INDICATED THAT ENVIRONMENTAL INTRUSION OF THE CORROSION PREVENTATIVE MATERIAL MAY HAVE OCCURRED DURING SERVICE. THE AIRCRAFT WAS 951 POUNDS OVER CERTIFICATED MAXIMUM GROSS WEIGHT. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1989_LAX89FA160.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.