19 PDU 4 Failure — Highest P first · recovered on first procedure

Ranking at first decision (Highest P first)

Hypothesis	P	T	P/T
1. PDU 4 Failure ★ ▸	0.256	6	0.0426
2. PDU 5 Failure	0.230	6	0.0384
3. Main Cabin Fan Failure	0.128	3	0.0426
4. Excess Water Vapor Pressure in Cabin	0.102	15	0.0068
5. TCCS Auxiliary Fan #2 Failure	0.077	20	0.0038
6. Fuel Cell #1 and PDU Failure	0.072	14	0.0051
7. TCCS Auxiliary Fan #1 Failure	0.033	20	0.0017
8. TCCS Auxiliary Fan at Reduced Capacity	0.026	4	0.0064
9. TCCS Filter Clog	0.026	18	0.0014
10. Trace Contaminants	0.026	20	0.0013
11. CDRA Failure	0.018	15	0.0012
12. Reduced Main Cabin Fan #1 Capacity	0.008	4	0.0019
13. Emergency O2 System Maintenance	0.000	8	0.0000
14. Fuel Cell Degrade	0.000	8	0.0000
15. Fuel Cell Failure	0.000	8	0.0000

15 of 31 · ★ truth · ▸ attempted · highlight = first pick · P=0 if unscored at first decision