Progress M-27M

 2015-024A

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Spacecraft 426, mission 59P. Mass 7289 kg including 879 kg prop, refuelling prop 494 kg, 50 kg O2, Rodnik water, 420 kg; cargo in GO 1393 kg. Total cargo 2357 kg.

After launch the vehicle was found spinning rapidly in yaw, with no vehicle telemetry and unresponsive to ground command, although onboard video was downlinked. Early element sets showing a lower than planned orbit were incorrect. The failure was linked to structural resonance issues in the third stage separation sequence, a design error in the Progress/Soyuz-2-1a combination.

Progress M-27M
Date	Time	Event	Orbit
2015 Apr 28	0709	Launch by Soyuz-2-1a	KB LC31?
		T+1:57 Strapons sep
		T+4:36 Blok-A MECO
		T+4:47 Blok-A sep
		T+4:56 KhO sep
		T+4:58 GO sep
	0715	T+8:44 MECO
	0715	T+8:48 Blok-I sep	187 x 259 x 51.7
2015 May 8	0204	Reentry over Pacific