FAS158 to IAS 19 recon: Pension accounting

Just want to get my head around this bizarre topic… This is what I understand: FAS 158: Funded status = Fairvalue of Plan assets - PBO Add yet to be recognized “smoothed events” --------------------------------------------------------- IAS 19: Net asset/liability Lets say P/A 100; PBO 50; “events”: 75; and this year amortz amt of smoothed events: 7.5 Now, FAS158: (I am not sure if this is how it is disclosed) Plan assets: 100 PBO-Liability:50 ----------------------- Funded status=50 ----------------------- Whereas IAS19: Plan assets: 100 PBO-Liability:50 Unrecogz events:67.5 PBO rel. liab: 137.5 ----------------------------- Net Asset/Liab:(37.5) ---------------------------- OCI Adj: (67.5) [I am not sure if this is how adjusted] Can someone who thinks is on top of the topic, correct/comment this with relevant explanations?