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Swissair 111

Printed page vi. PDF page 6.

Remaining Airborne - Emergency Landing . . . . . . . . . . . . . . . . . . 109 1.14.6 Integrated Firefighting Measures . . . . . . . . . . . .
Open final report at PDF page 6TSB A98H0003: In-flight fire leading to collision with water

Swissair 111

Printed page 27. PDF page 39.

aircraft. The AFS consists of two, dual-channel flight control computers (FCC) with two integrated autopilots, flight directors (FD), autothrottle, and engine trim controls. Manual override of the automatic flight controls and autothrottle is always available. The AFS hard
Open final report at PDF page 39TSB A98H0003: In-flight fire leading to collision with water

Swissair 111

Printed page 35. PDF page 47.

1.6.10.1 General Normal primary electrical power is generated by three, engine-driven, integrated-drive generators (IDG). An auxiliary power unit (APU) generator is also available as a back-up source of electrical power in certain ground or flight phases. The three IDGs s
Open final report at PDF page 47TSB A98H0003: In-flight fire leading to collision with water

Swissair 111

Printed page 109. PDF page 121.

in the event that the situation evolves into an uncontrollable in-flight fire. 1.14.6 Integrated Firefighting Measures At the time of the SR 111 occurrence, the aviation industry had not looked at in-flight firefighting in a systemic way. Typically, aircraft crews
Open final report at PDF page 121TSB A98H0003: In-flight fire leading to collision with water

Swissair 111

Printed page 111. PDF page 123.

combustible materials, was entered into computer models so that the information could be integrated and the patterns more readily viewed and assessed. Damage patterns indicate that the fire was concentrated in the areas above the cockpit ceiling liner and above
Open final report at PDF page 123TSB A98H0003: In-flight fire leading to collision with water

Swissair 111

Printed page 151. PDF page 163.

ground speed during the emergency descent. The ground speed was then mathematically integrated to derive displacement or distance travelled over time. The calculation profile assumed direct tracking to the Halifax Golf beacon from the point of the initiation of the
Open final report at PDF page 163TSB A98H0003: In-flight fire leading to collision with water