Narrative:

This pairing is a fatiguing and dangerous pairing that does not take normal circadian rhythms into account. This does lead to: crew inattn; communications; procedural; navigation errors; and crews falling asleep. It also doesn't account for systemic problems that invariably make days longer than published. This pairing requires that you sleep at night before day #1. Fly over 7 hours and get to ZZZ late at night. Sleep at night (possibly try to go to bed early morning and sleep late). Possibly try for a late afternoon nap before day #2. Go to work late at night to fly all night (2 legs) for approximately 7 hours. Go to sleep during day. Get up for the rest of the day; then go to sleep at night. Pairings with all-nighters should be standalone. Additional flying; whether on the front side or back side of all-nighter should be avoided.

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Original NASA ASRS Text

Title: AN ACR PILOT REPORTS EXTREME FATIGUE RESULTING FROM PAIRINGS WITH ALL NIGHT FLTS AND DAY FLTS DISRUPTING CIRCADIAN RHYTHM.

Narrative: THIS PAIRING IS A FATIGUING AND DANGEROUS PAIRING THAT DOES NOT TAKE NORMAL CIRCADIAN RHYTHMS INTO ACCOUNT. THIS DOES LEAD TO: CREW INATTN; COMS; PROCEDURAL; NAV ERRORS; AND CREWS FALLING ASLEEP. IT ALSO DOESN'T ACCOUNT FOR SYSTEMIC PROBS THAT INVARIABLY MAKE DAYS LONGER THAN PUBLISHED. THIS PAIRING REQUIRES THAT YOU SLEEP AT NIGHT BEFORE DAY #1. FLY OVER 7 HRS AND GET TO ZZZ LATE AT NIGHT. SLEEP AT NIGHT (POSSIBLY TRY TO GO TO BED EARLY MORNING AND SLEEP LATE). POSSIBLY TRY FOR A LATE AFTERNOON NAP BEFORE DAY #2. GO TO WORK LATE AT NIGHT TO FLY ALL NIGHT (2 LEGS) FOR APPROX 7 HRS. GO TO SLEEP DURING DAY. GET UP FOR THE REST OF THE DAY; THEN GO TO SLEEP AT NIGHT. PAIRINGS WITH ALL-NIGHTERS SHOULD BE STANDALONE. ADDITIONAL FLYING; WHETHER ON THE FRONT SIDE OR BACK SIDE OF ALL-NIGHTER SHOULD BE AVOIDED.

Data retrieved from NASA's ASRS site as of May 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.