Incident Overview
Date: Monday 28 April 1969
Aircraft Type: Boeing 727-116
Owner/operator: LAN Chile
Registration Number: CC-CAQ
Location: 24 km N of Colina –
ÿ Chile
Phase of Flight: Approach
Status: Destroyed, written off
Casualties: Fatalities: 0 / Occupants: 60
Component Affected: Flight Director equipment and the Flight Director’s operation.Flight Director equipment and the Flight Director’s operation.
Category: Accident
A flight from Buenos Aires to Santiago experienced a near-miss due to a critical failure in the flight director’s monitoring of the aircraft’s altitude and descent rate. The aircraft rapidly descended below the minimum altitude, triggering a ground impact.A flight from Buenos Aires to Santiago experienced a near-miss due to a critical failure in the flight director’s monitoring of the aircraft’s altitude and descent rate. The aircraft rapidly descended below the minimum altitude, triggering a ground impact.
Description
Flight 160 departed Buenos Aires at 23:56 GMT for a flight to Santiago. Approaching Santiago the aircraft kept descending below the minimum height of 2829 feet at the Outer Marker until striking the ground. PROBABLE CAUSE: “a) Excessive concentration by the crew on the indications given by the Flight Director; b) The crew erroneously operated the Flight Director equipment on a direct ILS approach; c) as a result of a) the crew did not check the instruments, which indicated: 1) descending below the minimum safely altitude; 2) rate of descent greater than normal for an ILS approach; 3) longitudinal attitude of the aircraft greater than normal for an ILS approach; 4) position of the aircraft below the ILS glide path.”
Primary Cause
a) Excessive concentration by the crew on the indications given by the Flight Director; b) The crew erroneously operated the Flight Director equipment on a direct ILS approach; c) as a result of a) the crew did not check the instruments, which indicated: 1) descending below the minimum safely altitude; 2) rate of descent greater than normal for an ILS approach; 3) longitudinal attitude of the aircraft greater than normal for an ILS approach; 4) position of the aircraft below the ILS glide path.a) Excessive concentration by the crew on the indications given by the Flight Director; b) The crew erroneously operated the Flight Director equipment on a direct ILS approach; c) as a result of a) the crew did not check the instruments, which indicated: 1) descending below the minimum safely altitude; 2) rate of descent greater than normal for an ILS approach; 3) longitudinal attitude of the aircraft greater than normal for an ILS approach; 4) position of the aircraft below the ILS glide path.Share on:
