As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: ON CLIMB WE HAD A STRONG MUSTY SMELL THROUGHOUT THE AIRCRAFT. WENT AWAY ONCE LEVEL. ON DESCENT ODOR CAME BACK IN COCKPIT AND FWD CABIN WITH POWER AT IDLE. AGAIN ONCE LEVEL THE SMELL WOULD GO AWAY.***(SUPPLEMENTAL ACTION SECT.4: C/W EA 302562 ENGINE WASH AND BURNOUT. C/W IAW J/C'S 26L40072016 AND 26L00021004. NO ODOR FOUND.***(CLOSED)