What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) The baron 58, N7271R, was holding on the centerline of the taxiway approach to the runup for runway 31 at Palo Alto airport. At least 6 a/c were in the runup area awaiting clearance for takeoff. As a place opened in the runup area, the baron 58 pilot advanced the throttles to begin to move into the runup area. Just at that moment, a Cessna 172, N79004, approached from behind to pass his left wing over the right wing of the baron 58 striking the baron 58'S propellor on the right engine. The propellor blades on the right engine were all bent forward. The Cessna's left wing sustained substantial damage.
As the FAA filed it
(-23) THE BARON 58, N7271R, WAS HOLDING ON THE CENTERLINE OF THE TAXIWAY APPROACH TO THE RUNUP FOR RUNWAY 31 AT PALO ALTO AIRPORT. AT LEAST 6 A/C WERE IN THE RUNUP AREA AWAITING CLEARANCE FOR TAKEOFF. AS A PLACE OPENED IN THE RUNUP AREA, THE BARON 58 PILOT ADVANCED THE THROTTLES TO BEGIN TO MOVE INTO THE RUNUP AREA. JUST AT THAT MOMENT, A CESSNA 172, N79004, APPROACHED FROM BEHIND TO PASS HIS LEFT WING OVER THE RIGHT WING OF THE BARON 58 STRIKING THE BARON 58'S PROPELLOR ON THE RIGHT ENGINE. THE PROPELLOR BLADES ON THE RIGHT ENGINE WERE ALL BENT FORWARD. THE CESSNA'S LEFT WING SUSTAINED SUBSTANTIAL DAMAGE.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.