SPACI score report for 2iad in ASTRAL 2.06:

PDB Entry: 2iad
SPACI score: 0.23
AEROSPACI score: 0.23

Experiment type: XRAY
Resolution: 2.4
R-factor: 0.253
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -1.102
WCK2 WHAT_CHECK Ramachandran: -3.031
WCK3 WHAT_CHECK Chi angles: -4.755
WCK4 WHAT_CHECK Backbone: -0.87

Note: Here are links to pages about PROCHECK and WHAT_CHECK.

Here is the full WHAT_CHECK report on this protein (linked from the WHAT_CHECK site).