Narrative:

Took off from ZZZ and flew to the ZZZ VOR and then to ZZZ1 VOR and then approach and landing at ZZZ1. Noticed that boost pump panel had departed the plane on the test flight that was on the left wing lower side during the postflt walkaround. Reported this loss to the tower at ZZZ; so that they could do a runway sweep. Also reported it to the company and made a logbook write-up. Callback conversation with reporter revealed the following information: reporter stated this was the first flight for this aircraft coming out of a heavy 'C' check. All boost pump access panel appeared secured during their pre-flight walkaround.

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Original NASA ASRS Text

Title: A B727-100 PILOT REPORTS OF FINDING A LEFT WING BOOST PUMP LOWER ACCESS PANEL MISSING DURING POST FLIGHT WALKAROUND.

Narrative: TOOK OFF FROM ZZZ AND FLEW TO THE ZZZ VOR AND THEN TO ZZZ1 VOR AND THEN APCH AND LNDG AT ZZZ1. NOTICED THAT BOOST PUMP PANEL HAD DEPARTED THE PLANE ON THE TEST FLT THAT WAS ON THE L WING LOWER SIDE DURING THE POSTFLT WALKAROUND. RPTED THIS LOSS TO THE TWR AT ZZZ; SO THAT THEY COULD DO A RWY SWEEP. ALSO RPTED IT TO THE COMPANY AND MADE A LOGBOOK WRITE-UP. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER STATED THIS WAS THE FIRST FLIGHT FOR THIS ACFT COMING OUT OF A HEAVY 'C' CHECK. ALL BOOST PUMP ACCESS PANEL APPEARED SECURED DURING THEIR PRE-FLIGHT WALKAROUND.

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.