Narrative:

After takeoff from ZZZ; ZZZ departure control relayed a message from ZZZ tower that something may have fallen from the aircraft during takeoff. The aircraft showed no sign of abnormality other than a tat probe message on the EICAS and the autothrottles disconnected. No vibration noted so we continued on to ZZZ1. A few mins later; ATC relayed the message from ZZZ tower that a mechanic's cushion had been found on or near the departure runway in ZZZ.

Google
 

Original NASA ASRS Text

Title: A B757-200 ON TKOF WAS ALERTED BY THE TWR THAT SOMETHING MAY HAVE DROPPED FROM THE ACFT. CREW NOTED NO VIBES OR MALFUNCTION. FOUND TECHNICIAN'S CUSHION ON RWY.

Narrative: AFTER TKOF FROM ZZZ; ZZZ DEP CTL RELAYED A MESSAGE FROM ZZZ TWR THAT SOMETHING MAY HAVE FALLEN FROM THE ACFT DURING TKOF. THE ACFT SHOWED NO SIGN OF ABNORMALITY OTHER THAN A TAT PROBE MESSAGE ON THE EICAS AND THE AUTOTHROTTLES DISCONNECTED. NO VIBRATION NOTED SO WE CONTINUED ON TO ZZZ1. A FEW MINS LATER; ATC RELAYED THE MESSAGE FROM ZZZ TWR THAT A MECH'S CUSHION HAD BEEN FOUND ON OR NEAR THE DEP RWY IN ZZZ.

Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.