A B757 reserve first officer called in fatigued after being assigned another short call trip because...

Narrative:

Once again; almost each week; I am assigned an xa:00 short call duty after having landed at xf:00. The trip in this case was even worse than usual since it was seven hours and fifty-seven minutes until on duty time. I awoke at several hours after midnight to commute in for the reserve trip assigned. I flew a flight which departed just before noon with one captain. [I] then had a 3:57 hour layover at the airport; so of course it was 3 minutes shy of the contractual hotel room for rest. I then flew with a different captain on an oceanic flight landing at an hour before midnight body time. I had adequate rest at that destination and then we departed at shortly after midnight body time from back to my domicile landing a couple of hours after daybreak. There is absolutely no way to then rest when we are required to be phone available at all times. I received a call mid day for a short call for that night; which I accepted because if we don't; the crew desk reports us to our flight office. At xc:00; I received a phone call from the crew desk assigning me a trip for that morning. I told them I was fatigued and unfit for the trip. At that point; I had slept 6 hours in the previous 38 hours. We are short on pilots and these assignments are happening all of the time. It is extremely unsafe and it must be changed.

Original NASA ASRS Text

Title: A B757 Reserve First Officer called in fatigued after being assigned another short call trip because she was only able to get six hours of sleep in the previous 38 hours.

Narrative: Once again; almost each week; I am assigned an XA:00 short call duty after having landed at XF:00. The trip in this case was even worse than usual since it was seven hours and fifty-seven minutes until on duty time. I awoke at several hours after midnight to commute in for the reserve trip assigned. I flew a flight which departed just before noon with one Captain. [I] then had a 3:57 hour layover at the airport; so of course it was 3 minutes shy of the contractual hotel room for rest. I then flew with a different Captain on an oceanic flight landing at an hour before midnight body time. I had adequate rest at that destination and then we departed at shortly after midnight body time from back to my domicile landing a couple of hours after daybreak. There is absolutely no way to then rest when we are required to be phone available at all times. I received a call mid day for a short call for that night; which I accepted because if we don't; the Crew Desk reports us to our Flight Office. At XC:00; I received a phone call from the crew desk assigning me a trip for that morning. I told them I was fatigued and unfit for the trip. At that point; I had slept 6 hours in the previous 38 hours. We are short on pilots and these assignments are happening all of the time. It is extremely unsafe and it must be changed.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1004993
Time
Date	201204
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	Marginal
Aircraft 1
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	Parked
Flight Plan	IFR
Person 1
Function	Pilot Flying First Officer
Experience	Flight Crew Last 90 Days 120 Flight Crew Total 7500 Flight Crew Type 600
Events
Anomaly	Other Fatigue

A B757 reserve first officer called in fatigued after being assigned another short call trip because she was only able to get six hours of sleep in the previous 38 hours.