Narrative:

After landing at cvg I post-flight my aircraft and discovered a large hydraulic servicing access door missing from my aircraft. Events and circumstances leading to the discovery follow: I work for (air carrier type) airlines and am domiciled in cincinnati, oh. I fly the 30 passenger mdt aircraft as a first officer (copilot). On the day of the incident (apr/sun/92), I arrived at flight operations at approximately pm hours local to prepare for a 2 day trip to various cities. During flight preparation, I read the company operations notice, 1 of which described an incident in which a hydraulic access door had fallen off an aircraft in flight and cautioning pilots to carefully pre/post-flight this door. While preflting my aircraft, I specifically checked both the left and right doors to ensure they were properly attached and latched. They were both there. We flew an uneventful revenue flight to tri- cities airport in bristol, tn, encountering no unusual aircraft noises or handling. After landing at tri-cities, the captain post/preflted the aircraft for the return trip to cincinnati, again taking care to check the hydraulic service doors. Again, they were both there. We departed tri-cities at approximately pm, encountering light turbulence during climb out to about 8000-10000 ft. The flight was routine, and nothing unusual was noticed regarding the aircraft handling. Upon landing and post-flight inspection at cincinnati, I discovered the left hydraulic service door was missing. The hinge was torn, indicating that the door had departed the aircraft sometime during the flight. At present, the door has not been recovered. All rest and currency requirements had been met. Both myself and my captain were alert and well rested.

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Original NASA ASRS Text

Title: FLC OF MDT ACR ACFT FOUND AN ACCESS DOOR MISSING DURING ACFT POST/PREFLT INSPECTION AFTER LNDG.

Narrative: AFTER LNDG AT CVG I POST-FLT MY ACFT AND DISCOVERED A LARGE HYD SVCING ACCESS DOOR MISSING FROM MY ACFT. EVENTS AND CIRCUMSTANCES LEADING TO THE DISCOVERY FOLLOW: I WORK FOR (ACR TYPE) AIRLINES AND AM DOMICILED IN CINCINNATI, OH. I FLY THE 30 PAX MDT ACFT AS A FO (COPLT). ON THE DAY OF THE INCIDENT (APR/SUN/92), I ARRIVED AT FLT OPS AT APPROX PM HRS LCL TO PREPARE FOR A 2 DAY TRIP TO VARIOUS CITIES. DURING FLT PREPARATION, I READ THE COMPANY OPS NOTICE, 1 OF WHICH DESCRIBED AN INCIDENT IN WHICH A HYD ACCESS DOOR HAD FALLEN OFF AN ACFT IN FLT AND CAUTIONING PLTS TO CAREFULLY PRE/POST-FLT THIS DOOR. WHILE PREFLTING MY ACFT, I SPECIFICALLY CHKED BOTH THE L AND R DOORS TO ENSURE THEY WERE PROPERLY ATTACHED AND LATCHED. THEY WERE BOTH THERE. WE FLEW AN UNEVENTFUL REVENUE FLT TO TRI- CITIES ARPT IN BRISTOL, TN, ENCOUNTERING NO UNUSUAL ACFT NOISES OR HANDLING. AFTER LNDG AT TRI-CITIES, THE CAPT POST/PREFLTED THE ACFT FOR THE RETURN TRIP TO CINCINNATI, AGAIN TAKING CARE TO CHK THE HYD SVC DOORS. AGAIN, THEY WERE BOTH THERE. WE DEPARTED TRI-CITIES AT APPROX PM, ENCOUNTERING LIGHT TURB DURING CLBOUT TO ABOUT 8000-10000 FT. THE FLT WAS ROUTINE, AND NOTHING UNUSUAL WAS NOTICED REGARDING THE ACFT HANDLING. UPON LNDG AND POST-FLT INSPECTION AT CINCINNATI, I DISCOVERED THE L HYD SVC DOOR WAS MISSING. THE HINGE WAS TORN, INDICATING THAT THE DOOR HAD DEPARTED THE ACFT SOMETIME DURING THE FLT. AT PRESENT, THE DOOR HAS NOT BEEN RECOVERED. ALL REST AND CURRENCY REQUIREMENTS HAD BEEN MET. BOTH MYSELF AND MY CAPT WERE ALERT AND WELL RESTED.

Data retrieved from NASA's ASRS site as of July 2007 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.