/g41/g79/g76/g74/g75/g87/g3/g36/g70/g70/g72/g83/g87/g68/g81/g70/g72/g3/g87/g72/g86/g87/g76/g81/g74 :Each subsystem has been thoroughly subjected to flight acceptance testing.  The testing was first done on subsystem level. Thereafter, similar functional testing has been executed as  done for the EQM.  /g40/g57/g36/g3/g70/g75/g72/g70/g78/g3/g69/g92/g3/g70/g82/g86/g80/g82/g81/g68/g88/g87/g29 /g3On the ERA EQM, an astronaut “walk-around” was performed as part of the  ERA Critical Design Review. This was the first time that cosmonauts saw the full-sized ERA arm  (previously only the MMIs had been seen by cosmonauts). The ERA arm was set in a typical operational pose. In particular, the EVA overrides for all ERA mechanisms, the labels/marking, and the EVA handrails and tether eyes, were presented (MLI was fitted at representative places). No major problems were identified.   Lessons Learned The Boosted Modal Survey testing can be a good alternative, but keep in mind: /g120Non-linear behavior in launch configuration; Hammering (deflections are larger than gaps). Slip and stick motion (frequency change, damping). The qualification may only be partly possible, still  requiring static strength testing necessary for other interface points.  /g120Assessment on non-linearity and damping to find the correct excitation levels / internal loads   /g120Care should be taken to prevent any over testing. /g3 Conclusions The ERA arm has been subjected to a rigorous test program on the subsystems and for the EQM. The  mechanisms have been designed for EVA and specific tests have been executed to demonstrate this  aspect. The flight model has undergone functional testing and integration testing with the MLM. Spare  ERA parts have already been launched upfront to the ISS in 2010. The flight model is now ready for final  integration on the MLM and launch in 2015.  References /g20/g17/g3 /g40/g53/g36/g3/g40/g52/g48/g3/g68/g81/g71/g3/g41/g79/g76/g74/g75/g87/g3/g48/g82/g71/g72/g79/g3/g55/g72/g86/g87/g3/g53/g72/g86/g88/g79/g87/g86/g3/g69/g92/g3/g51/g17/g3/g57/g72/g85/g93/g76/g77/g71/g72/g81/g15/g3/g58/g17/g3/g36/g71/g80/g76/g85/g68/g68/g79/g15/g3/g45/g17/g3/g46/g82/g88/g90/g72/g81/g15/g3/g39/g88/g87/g70/g75/g3/g54/g83/g68/g70/g72/g15/g3/g55/g75/g72/g3 /g49/g72/g87/g75/g72/g85/g79/g68/g81/g71/g86/g15/g3/g36/g54/g55/g53/g36/g3/g21/g19/g19/g19/g17/g3/g3 2./g3/g40/g53/g36/g3/g87/g72/g86/g87/g3/g85/g72/g86/g88/g79/g87/g86/g3/g36/g86/g87/g85/g68/g3/g28/g27/g30/g3/g49/g82/g89/g3/g28/g27/g29/g3/g41/g82/g78/g78/g72/g85/g3/g54/g83/g68/g70/g72/g3/g37/g57/g17/g3/g38/g17/g3/g43/g82/g73/g78/g68/g80/g83/g3/g68/g81/g71/g3/g51/g17/g3/g57/g72/g85/g93/g76/g77/g71/g72/g81/g15/g3/g68/g81/g71/g3/g45/g17/g3/g54/g70/g75/g68/g90/g72/g85/g3 /g39/g36/g54/g36/g30/g3/g39/g17/g3/g57/g72/g85/g75/g82/g72/g89/g72/g81/g30/g3/g54/g36/g37/g38/g36/g17   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