Aviation Safety Reporting: Cognitive Fatigue & Circadian Disruption Assessment

1. Section 1: Flight Number, Route & Duty Time Metadata

This section captures essential flight operation metadata to contextualize the fatigue event within operational parameters, crew resource management, and environmental conditions. Accurate completion enables precise fatigue risk pattern analysis and system-level safety improvements.

 

Flight Number

Date of Flight (UTC)

Aircraft Type & Registration

Route & Timezone Data

Airport ICAO Code

Airport Name

Role (Departure/Destination/Alternate)

UTC Offset (hours)

Scheduled Time (Local)

Actual Time (Local)

A
B
C
D
E
F
1
KJFK
John F. Kennedy International
Departure
-5
6/15/2025, 10:30 PM
6/15/2025, 10:45 PM
2
OMDB
Dubai International
Destination
4
6/16/2025, 8:15 PM
6/16/2025, 8:30 PM
3
OTHH
Hamad International
Alternate
3
 
 
4
 
 
 
 
 
 
5
 
 
 
 
 
 
6
 
 
 
 
 
 
7
 
 
 
 
 
 
8
 
 
 
 
 
 
9
 
 
 
 
 
 
10
 
 
 
 
 
 

Crew Composition & Experience Metrics

Crew Position

Total Flight Hours

Hours on Type

Hours in Last 30 Days

Hours in Last 7 Days

Number of Night Landings (Last 90 Days)

A
B
C
D
E
F
1
Captain (PF)
12500
4500
75
18
12
2
First Officer (PM)
8500
3200
82
20
15
3
Relief Captain
15000
6000
68
16
10
4
 
 
 
 
 
 
5
 
 
 
 
 
 
6
 
 
 
 
 
 
7
 
 
 
 
 
 
8
 
 
 
 
 
 
9
 
 
 
 
 
 
10
 
 
 
 
 
 

Duty Period Breakdown (All Times in UTC)

Duty Event

Time

Elapsed Minutes from Report

Block Hours (if applicable)

A
B
C
D
1
 
6/15/2025, 7:00 PM
0
 
2
 
6/15/2025, 9:45 PM
165
0
3
 
6/15/2025, 10:30 PM
210
0.75
4
 
6/16/2025, 5:00 AM
600
6.25
5
 
6/16/2025, 6:00 PM
1380
18.25
6
 
6/16/2025, 6:30 PM
1410
18.75
7
 
6/16/2025, 7:30 PM
1470
 
8
 
 
 
 
9
 
 
 
 
10
 
 
 
 

Total Block Hours for This Flight

Total Duty Period Hours

Number of Time Zones Crossed (Eastbound Positive, Westbound Negative)

Direction of Travel

Did this flight follow a previous flight with less than 10 hours rest?

 

Describe the preceding flight pattern and rest period quality:

Environmental Stressors During Flight (Rate Intensity)

None

Mild

Moderate

Severe

Extreme

Turbulence (Mechanical Stress)

Cabin Altitude/Pressure Changes

Temperature Extremes in Cockpit

Solar Radiation Exposure

Noise/Vibration Levels

Air Quality/Odors

2. Section 2: Sleep Tracking & Rest Break Deficit Log

Comprehensive sleep and rest data is critical for understanding cumulative fatigue accumulation and circadian desynchronization. This section quantifies sleep quantity, quality, and rest break effectiveness using validated aviation fatigue metrics.

 

Sleep Quality Ratings (1=Poor, 5=Excellent)

Sleep in Last 7 Days (Average)

Sleep in Last 48 Hours (Total)

Sleep in Last 24 Hours (Pre-Flight)

Pre-Flight Nap (if applicable)

Sleep During In-Flight Rest Break 1

Sleep During In-Flight Rest Break 2

Sleep During In-Flight Rest Break 3

Sleep Episode Details (Hours:Minutes Format)

Sleep Episode

Start Time (UTC)

End Time (UTC)

Duration (Minutes)

Sleep Latency (Minutes to Fall Asleep)

Number of Awakenings

A
B
C
D
E
F
1
Pre-Flight Night Sleep
2025-06-15 14:00
2025-06-15 21:00
420
15
2
2
In-Flight Break #1
2025-06-16 02:30
2025-06-16 05:30
180
10
1
3
In-Flight Break #2
2025-06-16 12:00
2025-06-16 14:30
150
25
3
4
 
 
 
 
 
 
5
 
 
 
 
 
 
6
 
 
 
 
 
 
7
 
 
 
 
 
 
8
 
 
 
 
 
 
9
 
 
 
 
 
 
10
 
 
 
 
 
 

Karolinska Sleepiness Scale (KSS) at Report Time (1=Extremely Alert, 9=Extremely Sleepy)

Karolinska Sleepiness Scale (KSS) at Top of Climb

Karolinska Sleepiness Scale (KSS) at Mid-Flight

Karolinska Sleepiness Scale (KSS) at Top of Descent

Did you consume any sleep aids or medications within 48 hours pre-flight?

 

Specify medication, dosage, and timing (include melatonin, prescription hypnotics, antihistamines):

Did you consume caffeine within 4 hours of intended sleep period?

 

Specify caffeine type, quantity, and timing relative to sleep:

In-Flight Rest Environment Quality

Excellent

Good

Fair

Poor

Unusable

Bunk/Crew Rest Area Darkness

Noise Levels (External/Internal)

Vibration Levels

Temperature Comfort

Privacy Level

Sleep Equipment Quality (Pillows, Blankets)

Estimated Sleep Debt Accumulated During This Duty Period (Hours)

Did you experience any circadian rhythm disruption symptoms (e.g., gastrointestinal issues, temperature dysregulation, mood changes)?

 

Describe specific symptoms, onset time, and severity:

3. Section 3: In-Flight Cognitive & Reaction Time Indicators

Objective and subjective cognitive performance indicators are essential for correlating fatigue levels with operational performance degradation. This section captures both self-perceived cognitive deficits and observable performance indicators that may compromise flight safety.

 

Subjective Cognitive State During Flight Phases (Rate at Each Phase)

Pre-Flight/Setup Phase

Takeoff & Initial Climb

Cruise Phase (First Half)

Mid-Flight Handover

Cruise Phase (Second Half)

Descent & Approach

Landing & Taxi-In

Cognitive Symptom Intensity (Rate Frequency/Severity: 1=None to 5=Constant/Severe)

1 - None

2 - Mild/Occasional

3 - Moderate/Frequent

4 - Severe/Multiple Times

5 - Constant/Debilitating

Brain Fog/Mental Clouding

Attention Lapses (Missed Calls/Checklist Items)

Working Memory Failures (Forgot Instructions/Data)

Sustained Attention Difficulty (Vigilance Decrement)

Processing Speed Reduction

Spatial Disorientation Episodes

Communication Comprehension Delay

Did you experience any confirmed microsleep episodes during flight?

 

Specify flight phase, duration estimate, how detected (self/crew), and recovery actions taken:

Did you notice any reaction time delays in responding to ATC instructions or system alerts?

 

Describe specific instances, delay duration, and potential safety impact:

Observable Performance Degradation Events (Log Each Instance)

Time (UTC)

Flight Phase

Error Type

Description & Context

Detected by Self

Detected by Crew

Severity (1=Minor, 5=Critical)

A
B
C
D
E
F
G
1
6/16/2025, 3:45 AM
Cruise
Communication
Read back incorrect altitude
Yes
 
 
2
6/16/2025, 1:20 PM
Descent
Checklist
Missed approach briefing item
Yes
Yes
 
3
 
 
 
 
 
 
 
4
 
 
 
 
 
 
 
5
 
 
 
 
 
 
 
6
 
 
 
 
 
 
 
7
 
 
 
 
 
 
 
8
 
 
 
 
 
 
 
9
 
 
 
 
 
 
 
10
 
 
 
 
 
 
 

Did you experience any automation surprise or mode confusion events?

 

Detail the automation behavior, expected vs actual outcome, and resolution time:

Overall Situational Awareness Level at Mid-Flight (1=Complete Loss to 10=Perfect SA)

Were there any crew coordination or communication breakdowns attributed to fatigue?

 

Describe the breakdown, crew member(s) involved, and impact on CRM:

Which cognitive domains were most affected? (Select all that apply)

Did you utilize any objective alertness monitoring tools (e.g., reaction time tests, PVT device)?

 

Specify tool used, test results, and correlation with subjective fatigue:

4. Section 4: Operational Mitigations Executed in Cockpit

Documenting implemented fatigue countermeasures provides critical data for evaluating effectiveness of current FRMS strategies and developing enhanced protocols. This section captures both standard and adaptive mitigation strategies employed during the flight.

 

Which pre-planned fatigue mitigation strategies were active on this flight? (Select all that apply)

Did you extend or modify planned rest breaks beyond standard schedule?

 

Justify extension, additional time granted, and operational impact:

Mitigation Actions Log (Document Each Action Taken)

Time Implemented (UTC)

Mitigation Type

Specific Action Description

Perceived Effectiveness (1=None to 5=Complete Recovery)

Documented in Tech Log

A
B
C
D
E
1
6/16/2025, 4:00 AM
Caffeine
Consumed 200mg coffee
 
 
2
6/16/2025, 12:30 PM
Task Delegation
FO assumed PM duties early
 
 
3
 
 
 
 
 
4
 
 
 
 
 
5
 
 
 
 
 
6
 
 
 
 
 
7
 
 
 
 
 
8
 
 
 
 
 
9
 
 
 
 
 
10
 
 
 
 
 

Effectiveness of Specific Mitigation Strategies Used

Not Used

Ineffective

Slightly Effective

Moderately Effective

Highly Effective

In-Seat Controlled Rest (if applicable)

Bunk Sleep Quality (if applicable)

Caffeine Consumption (Timing/Dose)

Light Exposure Management (Bright Light/Darkness)

Physical Activity/Movement

Task Rotation/Workload Redistribution

Enhanced Crew Communication Protocols

Automation Utilization Increase

Did you implement any non-standard operational procedures due to fatigue concerns?

 

Detail the procedure deviation, safety assessment, and coordination with ATC/Operations:

Did you request priority handling, expedited routing, or additional spacing due to fatigue?

 

Describe request, ATC response, and rationale:

How did you communicate fatigue concerns to other crew members?

Did the crew utilize a formal fatigue monitoring or reporting tool during flight?

 

Specify tool, frequency of use, and real-time decision support provided:

Describe any additional creative or adaptive strategies you employed to maintain alertness and performance that are not covered above:

5. Section 5: Chief Pilot & Aviation Medical Review

This final section ensures proper oversight, medical evaluation, and follow-up action. It establishes accountability, triggers appropriate support mechanisms, and contributes to organizational learning and regulatory compliance while maintaining confidentiality protections.

 

Report Submission Timestamp (UTC)

I consent to this report being shared with the airline's Safety Management System (SMS) for trend analysis (personal identifiers will be protected)

I consent to this report being shared with the Aviation Medical Examiner (AME) for health monitoring purposes

I request a confidential discussion with the Chief Pilot regarding this event

I believe this event warrants immediate Aviation Medical Review due to potential health concerns

 

Specify medical symptoms or concerns (e.g., persistent cognitive issues, sleep disorder suspicion, mental health):

Pilot's Self-Assessment of Fitness to Continue Flying Duties

Pilot's Digital Signature (By submitting, I certify this report is truthful and complete to the best of my knowledge)

Chief Pilot Review Completed

 

Review Timestamp

Chief Pilot Comments and Initial Assessment:

Chief Pilot Determination

Aviation Medical Examiner (AME) Review Completed

 

AME Review Timestamp

AME Clinical Assessment Notes (Medical Findings, Diagnosis, Recommendations):

AME Fitness Determination

Was a referral made to a sleep medicine specialist?

 

Specify referral reason and specialist details:

Follow-up Actions & Monitoring Plan (Include timeline, responsible parties, and success metrics):

Has this report been entered into the airline's Fatigue Risk Management System (FRMS) database?

FRMS Database Entry ID and Data Analyst Notes:

 

Thank you for submitting this comprehensive report. Your contribution to aviation safety through transparent fatigue reporting is invaluable. All information will be handled in accordance with applicable confidentiality protections and non-punitive reporting policies. For immediate support, contact Flight Operations or Aviation Medicine 24/7.

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