Asim,
The Dependent demand for phantom assembly is in ECC but not in APO which means that the Dependent demand may not not CIF'd to APO. You can start with CFM5 in ECC by choosing the phantom material and all transaction data and then perform a CIF Reconciliation in APO. Can you look up the phantom material in RRP3 view at the location where the PDS exists. Another approach would be to look up the pegging relationship for a Planned Order of Material A and see if has components along with phantom material.
Regards
AK