Air carrier captain reported experiencing extreme fatigue on a two-leg international assignment.

Narrative:

The issue is what happens [in the late afternoon between flights at an international terminal]. Required to stay on the plane while passengers disembark. About an hour with constant PA announcements. Then we are placed on an inter-terminal bus. Neither clean nor comfortable. This lasted just over 2 hours. We had to change buses once because the AC didn't work on the first bus. (No chance for any rest at all!) allowed back on the plane to perform pre-flight duties. Already on the back side of the clock and put in deplorable conditions without even a facility to use for personal hygiene/bodily functions. (No rest rooms!) fighting bad weather on the return [flight] made this a very frustrating and possibly dangerous situation. We both felt very fatigued during the return flight. There has to be a better way. Both of us passed out on the ride back to the hotel. (I almost never sleep on a bus.)

Original NASA ASRS Text

Title: Air carrier Captain reported experiencing extreme fatigue on a two-leg international assignment.

Narrative: The issue is what happens [in the late afternoon between flights at an international terminal]. Required to stay on the plane while passengers disembark. About an hour with constant PA announcements. Then we are placed on an inter-terminal bus. Neither clean nor comfortable. This lasted just over 2 hours. We had to change buses once because the AC didn't work on the first bus. (NO CHANCE FOR ANY REST AT ALL!) Allowed back on the plane to perform pre-flight duties. Already on the back side of the clock and put in deplorable conditions without even a facility to use for personal hygiene/bodily functions. (NO REST ROOMS!) Fighting bad weather on the return [flight] made this a very frustrating and possibly dangerous situation. We both felt very fatigued during the return flight. There has to be a better way. Both of us passed out on the ride back to the hotel. (I almost never sleep on a bus.)

Data retrieved from NASA's ASRS site 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	1754622
Time
Date	202008
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZZ.Airport
State Reference	FO
Environment
Flight Conditions	IMC
Aircraft 1
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 43 Flight Crew Total 5255 Flight Crew Type 1304
Events
Anomaly	No Specific Anomaly Occurred All Types