NTSB NYC89IA176 — 1989-07-25 · NEWARK, New Jersey, United States

Aircraft involved

N556NY Douglas DC-9-30 None

Probable cause & findings

RUPTURE OF A FLEXIBLE HIGH PRESSURE HYDRAULIC LINE IN THE 'A' HYDRAULIC SYSTEM, DUE TO CHAFING OF THE STEEL BRAID COVERING, WHICH ALLOWED THE SYSTEM PRESSURE AND QUANTITY TO BE COMPLETELY DEPLETED.

Factual narrative

THE CREW OF CONTINENTAL AIRLINES FLIGHT 354 EXPERIENCED A LOSS OF THE LEFT HYDRAULIC SYSTEM AND STARTED TO LOSE HYDRAULIC QUANTITY FROM THE RIGHT SYSTEM. ANTICIPATING A LOSS OF BOTH SYSTEMS, THE CREW SHUT DOWN BOTH PUMPS AND MADE AN EMERGENCY LANDING AT NEWARK INTL AIRPORT, NJ. THE LANDING WAS NORMAL UNTIL AT 80 KNOTS AIRSPEED, THEN THE LEFT TIRES BLEW OUT. THE AIRCRAFT THEN SWERVED TO THE LEFT AND CAME TO A HALT 30 FT LEFT OF THE RUNWAY CENTERLINE. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1989_NYC89IA176.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

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Related research

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NASA NTRS 2011 · Reprint (Version printed in journal) Predicted airframe noise levels for certification flights

A correction is presented for a previously published inconsistency in predicted airframe noise values, which were based on approach velocities lower than those required for FAA certification.