A C500 during a preflight logbook check was found to have both engine turbine discs out of time.

Attributes
ACN	384866
Time
Date	199710
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ads
State Reference	TX
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Citation I
Operating Under FAR Part	Part 91
Flight Phase	other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 100 flight time total : 5000 flight time type : 400
ASRS Report	384866
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : atp pilot : cfi
Experience	flight time last 90 days : 150 flight time total : 5800 flight time type : 5
ASRS Report	384652
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure non adherence : far other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

I was contracted to fly as PIC a cessna C500, from amw to ads for the purpose of a pre-purchase inspection. According to FBO/maintenance reports available to the crew, the aircraft was airworthy and current with all inspections, etc. During the pre-purchase inspection, maintenance personnel with the pratt and whitney facility in addison reviewed the aircraft logbooks and determined there may be a discrepancy between the reported times and actual times of certain engine parts in the P&west JT15D-1A engines. Specifically, the high pressure turbine blades were installed new prior to the last overhaul, yet the FBO reports showed them new at overhaul. The blades are approximately 400 hours past their life limits at this time, the current owner of the aircraft has operated the plane approximately 200 hours. The inspection took 2- 3 days. I think aircraft owners, operators and pilots believe FBO reports to be correct, however, they are only as accurate as the information sent to manufacturer by maintenance personnel in the field. In this case, I think an assumption was made yrs ago concerning parts replacement at overhaul which may have been inaccurate.

Original NASA ASRS Text

Title: A C500 DURING A PREFLT LOGBOOK CHK WAS FOUND TO HAVE BOTH ENG TURBINE DISCS OUT OF TIME.

Narrative: I WAS CONTRACTED TO FLY AS PIC A CESSNA C500, FROM AMW TO ADS FOR THE PURPOSE OF A PRE-PURCHASE INSPECTION. ACCORDING TO FBO/MAINT RPTS AVAILABLE TO THE CREW, THE ACFT WAS AIRWORTHY AND CURRENT WITH ALL INSPECTIONS, ETC. DURING THE PRE-PURCHASE INSPECTION, MAINT PERSONNEL WITH THE PRATT AND WHITNEY FACILITY IN ADDISON REVIEWED THE ACFT LOGBOOKS AND DETERMINED THERE MAY BE A DISCREPANCY BTWN THE RPTED TIMES AND ACTUAL TIMES OF CERTAIN ENG PARTS IN THE P&W JT15D-1A ENGS. SPECIFICALLY, THE HIGH PRESSURE TURBINE BLADES WERE INSTALLED NEW PRIOR TO THE LAST OVERHAUL, YET THE FBO RPTS SHOWED THEM NEW AT OVERHAUL. THE BLADES ARE APPROX 400 HRS PAST THEIR LIFE LIMITS AT THIS TIME, THE CURRENT OWNER OF THE ACFT HAS OPERATED THE PLANE APPROX 200 HRS. THE INSPECTION TOOK 2- 3 DAYS. I THINK ACFT OWNERS, OPERATORS AND PLTS BELIEVE FBO RPTS TO BE CORRECT, HOWEVER, THEY ARE ONLY AS ACCURATE AS THE INFO SENT TO MANUFACTURER BY MAINT PERSONNEL IN THE FIELD. IN THIS CASE, I THINK AN ASSUMPTION WAS MADE YRS AGO CONCERNING PARTS REPLACEMENT AT OVERHAUL WHICH MAY HAVE BEEN INACCURATE.

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.