Measuring the effects of human performance on safety, environmental

and economic outputs using Flight Data Monitoring. HumP-FDM.

Trond-Eirik Strand, MD, PhDSjeflege / Leder human factors

Luftfartstilsynet

Agenda

IntroduksjonStudie designResultaterVeien videre

Definisjon fatigue

“A physiological state of reduced mental or physical performance capability resulting from sleep loss or extended wakefulness, circadian phase, or workload (mental and/or physical activity) that can impair a crew member ’s alertness and ability to safely operate an aircraft or perform safety related duties.”

ALERT

SLEEPY

Karolinska sleepiness scale (KSS)

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Sikkerhetsteam - Fatigue

• Safety promotion

• Rapportering

• Fokuserte FTL inspeksjoner

• Regelverksutvikling

*Hazard identification

*Safety risk assessment and mitigation

Ross Philips (PhD)

Prof Stian Antonsen (PhD)Tor-Erik Evjemo (PhD)

Dr Trond-Eirik Strand

Capt Stein Arne Lien

Project team – Trippel helix

Studie design

• All short-haul flights 2017 were analysed (Norwegian 737 NAS/NAN AOCs)• Jeppesen generated predicted fatigue (KSS) on Top Of Descent (TOD) both pilots from

planned rosters using the Boeing Alertness Model (BAM)• FDM data analysed by Flight Data Services (UK) using existing Key Performance Variables

(KPVer) • The following two groups were compared on selected KPVs:

Alert KSS ≤4 Sleepy KSS ≥6

Data

103 247 flights8 412 KSS ≥617 149 KSS ≤4

KSS TOD vs. flight leg

KSS TOD vs. flight duration

KSS TOD vs. night / day

KSS TOD vs. sommer / vinter

KSS TOD vs. arrival airport

Alert mean = 1,81Sleepy mean = ,38ES = ,42p << ,001

Landing performance

Alert mean = 1,97Sleepy mean = ,47ES = ,42p << ,001

Landing performance

Alert mean = 297Sleepy mean = 315ES = ,21p << ,001

Landing performance

Hard landings

Alert mean = 1,43Sleepy mean = 1,45ES = ,18p << ,001

Thrust reverse actuation on landing

AP disengage altitude during approach

Alert mean = 990Sleepy mean = 905ES = ,11p << ,001

AP engage altitude during departure

Speed at Flap extension – Flap 1

Speed at Flap extension – flap 5

Speed at Flap extension – flap 15

Speed at Flap extension – flap 30

Fuel burn descend

Fuel quantity at shutdown

Fuel burn taxi in

Taxi speed

KonklusjonerDet er indikasjoner på forskjeller i pilot performance som skyldes fatige vedrørende

• Approach• Landing• Autopilot use• Taxi speed• Flap extension speed• Fuel use

Dette kan ha en betydning for sikkerhetsytelse, produktivitet og miljø

Veien videre

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