Lock in handle before pumping up.

YOUR APU NEEDS PUMPING.

WE'LL BOTH GET A WORKOUT! I'LL GET SOME PSI, AND YOU'LL GET SOME MUSCLE!

YOUR BLACK HAWK IS EQUIPPED WITH AN AUXILIARY POWER UNIT (APU) TO GET THE ENGINES GOING WHEN YOU'RE OUT THE BOONIES AND GROUND POWER IS NOT AVAILABLE.

AND THE APU HAS A PRESSURE ACCUMULATOR TO GET IT STARTED.

BUT WHAT DO YOU DO WHEN THE ACCUMULATOR PRESSURE IS LOW?

DOESN'T THE ACCUMULATOR GET RECHARGED WHEN THE APU IS UP TO OPERATIONAL SPEED?

DOESN'T THE ACCUMULATOR GET RECHARGED WHEN THE APU IS UP TO OPERATIONAL SPEED?

NORMALLY, THAT'S THE CASE, THEN THE BACKUP SYSTEM PUMP RECHARGES THE ACCUMULATOR TO AT LEAST 2800 PSI.

BUT IF THAT DOESN'T HAPPEN ... WELL, THEN I'M IN TROUBLE. I HAVE NO IDEA HOW TO GET A START.

ALL IS NOT LOST.

THE ACCUMULATOR CAN BE RECHARGED USING THE HAND-PUMP.

MANUAL RECHARGING DOESN'T HAPPEN VERY OFTEN, THOUGH ...

... SO SOME SOLDIERS FORGET TO LOOK PUMP HANDLE, NSN 5340-00-217-3101, INTO THE RECEPTACLE BEFORE PUMPING.

HERE'S WHAT YOU NEED TO DO ...

IF THE HANDLE SLIPS OUT WHILE YOU'RE PUMPING, THE EARS ON THE EDGE OF THE PUMP HANDLE CAN BE BROKEN.

THEN IT'S UNUSABLE. YOUR BIRD COULD BE NMC IF YOU CAN'T PUMP UP THE ACCUMULATOR WHEN NEEDED.

SO, REMEMBER TO LOCK THE HANDLE BEFORE YOU START PUMPING!

HOW'S THAT?

GREAT! NOW WE'RE BOTH PUMPED UP!