Narrative:

After the flight school; where I had taught for 8 yrs; closed; I took 2 of my students to the school next door to finish their training. It was to be our very first flight there. I joined my student as she was finishing up the preflight on the CE172N. At my previous school; aircraft are dispatched with a clipboard; on which is a sticker detailing the required inspections (annual; 100 hour; transponder; ELT; etc). I teach my students to always check them; and I rechk them whenever I get in the airplane. The new school dispatches a 3-RING binder with the aircraft; which includes a page detailing the inspections. I opened the book to check that the aircraft was legal and found that only little more than 1 hour (tach time) was left until the 100 hour inspection was due. Not wanting to overfly the 100 hour or the required airworthiness directives; I went inside and brought this to the attention of the school's owner. As it turns out; the owner had recently sold the aircraft to an individual who was then leasing it back to the school. The new aircraft owner decided to have a new engine installed and a fresh 100 hour done. I was told that the aircraft owner flew the aircraft for the 25 hour break-in period and that there was roughly 75 hours remaining till the next 100 hour inspection. The school owner stated they would update the figures in the dispatch binder. I flew the aircraft that day; and on several subsequent lessons. Today it was discovered that the 100 hour inspection was not accomplished when the engine was installed! Therefore; I violated the regulations by flying this aircraft. I had relied on the information given by someone intimately familiar with the aircraft. Had I insisted on examining the logbooks; I would have caught the discrepancy.

Google
 

Original NASA ASRS Text

Title: A FLT INSTRUCTOR RPTS FLYING A C172 OUT OF 100 HR INSPECTION TIME AFTER BEING TOLD THE INSPECTION HAD BEEN COMPLETED IN CONJUNCTION WITH AN ENG CHANGE.

Narrative: AFTER THE FLT SCHOOL; WHERE I HAD TAUGHT FOR 8 YRS; CLOSED; I TOOK 2 OF MY STUDENTS TO THE SCHOOL NEXT DOOR TO FINISH THEIR TRAINING. IT WAS TO BE OUR VERY FIRST FLT THERE. I JOINED MY STUDENT AS SHE WAS FINISHING UP THE PREFLT ON THE CE172N. AT MY PREVIOUS SCHOOL; ACFT ARE DISPATCHED WITH A CLIPBOARD; ON WHICH IS A STICKER DETAILING THE REQUIRED INSPECTIONS (ANNUAL; 100 HR; XPONDER; ELT; ETC). I TEACH MY STUDENTS TO ALWAYS CHK THEM; AND I RECHK THEM WHENEVER I GET IN THE AIRPLANE. THE NEW SCHOOL DISPATCHES A 3-RING BINDER WITH THE ACFT; WHICH INCLUDES A PAGE DETAILING THE INSPECTIONS. I OPENED THE BOOK TO CHK THAT THE ACFT WAS LEGAL AND FOUND THAT ONLY LITTLE MORE THAN 1 HR (TACH TIME) WAS LEFT UNTIL THE 100 HR INSPECTION WAS DUE. NOT WANTING TO OVERFLY THE 100 HR OR THE REQUIRED AIRWORTHINESS DIRECTIVES; I WENT INSIDE AND BROUGHT THIS TO THE ATTN OF THE SCHOOL'S OWNER. AS IT TURNS OUT; THE OWNER HAD RECENTLY SOLD THE ACFT TO AN INDIVIDUAL WHO WAS THEN LEASING IT BACK TO THE SCHOOL. THE NEW ACFT OWNER DECIDED TO HAVE A NEW ENG INSTALLED AND A FRESH 100 HR DONE. I WAS TOLD THAT THE ACFT OWNER FLEW THE ACFT FOR THE 25 HR BREAK-IN PERIOD AND THAT THERE WAS ROUGHLY 75 HRS REMAINING TILL THE NEXT 100 HR INSPECTION. THE SCHOOL OWNER STATED THEY WOULD UPDATE THE FIGURES IN THE DISPATCH BINDER. I FLEW THE ACFT THAT DAY; AND ON SEVERAL SUBSEQUENT LESSONS. TODAY IT WAS DISCOVERED THAT THE 100 HR INSPECTION WAS NOT ACCOMPLISHED WHEN THE ENG WAS INSTALLED! THEREFORE; I VIOLATED THE REGS BY FLYING THIS ACFT. I HAD RELIED ON THE INFO GIVEN BY SOMEONE INTIMATELY FAMILIAR WITH THE ACFT. HAD I INSISTED ON EXAMINING THE LOGBOOKS; I WOULD HAVE CAUGHT THE DISCREPANCY.

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.