As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - EMERGENCY LANDING - FLT 0154 - EN ROUTE FROM SFO TO PHX RECEIVED GREEN HYDRAULIC SYSTEM RESERVOIR LOW LEVEL INDICATION. DECLARED EMERGENCY AND LANDED WITHOUT FURTHER EVENT. MAINTENANCE FOUND NR 1 ENGINE (GREEN SYSTEM) HYDRAULIC PRESSURE SWITCH CRACKED AND LEAKING. REMOVED AND REPLACED NR 1 ENGINE HYDRAULIC PRESSURE SWITCH IAW AMM 29-11-17, LEAK AND OPERATIONAL CHECK WAS GOOD.