A cessna U206F was operated with the wrong brake assemblies installed.

Attributes
ACN	378444
Time
Date	199708
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Cessna Stationair/Turbo Stationair 6
Operating Under FAR Part	Part 91
Flight Phase	other
Flight Plan	None
Person 1
Affiliation	Other
Function	other personnel
Qualification	other other : other
ASRS Report	378444
Person 2
Affiliation	Other
Function	other personnel
Qualification	other other : other
Events
Anomaly	aircraft equipment problem : critical non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

On aug/zz/97 I was contacted by a mechanic at 'XXX.' he informed me about a situation that had arisen on an airplane that I had inspected and signed off for return to service on aug/za/96, a cessna U206F. During an annual inspection, a problem with a leaking fitting on a brake caliper was noted. When the mechanic tried to install a new caliper it was found to not fit properly. The parts catalog was referenced also. Calls were made to the wheel and brake manufacturer 'cleveland parker hannifin' after measuring the wheels and brake discs for offset, etc. It was determined that the aircraft had pn-40-75B wheel/brake assemblies rather than the approved pn-40-75D wheel/brake assemblies called out for by the manufacturer. There are no entries in the aircraft logbook concerning the replacement of wheels or brakes. The part numbers were very difficult to read after yrs of service and the similarity of the 2 different part numbers made it that much more difficult to detect. Svcable proper part number wheel/brake assemblies were located and forwarded to the mechanic who was working on the airplane at XXX.

Original NASA ASRS Text

Title: A CESSNA U206F WAS OPERATED WITH THE WRONG BRAKE ASSEMBLIES INSTALLED.

Narrative: ON AUG/ZZ/97 I WAS CONTACTED BY A MECH AT 'XXX.' HE INFORMED ME ABOUT A SIT THAT HAD ARISEN ON AN AIRPLANE THAT I HAD INSPECTED AND SIGNED OFF FOR RETURN TO SVC ON AUG/ZA/96, A CESSNA U206F. DURING AN ANNUAL INSPECTION, A PROB WITH A LEAKING FITTING ON A BRAKE CALIPER WAS NOTED. WHEN THE MECH TRIED TO INSTALL A NEW CALIPER IT WAS FOUND TO NOT FIT PROPERLY. THE PARTS CATALOG WAS REFED ALSO. CALLS WERE MADE TO THE WHEEL AND BRAKE MANUFACTURER 'CLEVELAND PARKER HANNIFIN' AFTER MEASURING THE WHEELS AND BRAKE DISCS FOR OFFSET, ETC. IT WAS DETERMINED THAT THE ACFT HAD PN-40-75B WHEEL/BRAKE ASSEMBLIES RATHER THAN THE APPROVED PN-40-75D WHEEL/BRAKE ASSEMBLIES CALLED OUT FOR BY THE MANUFACTURER. THERE ARE NO ENTRIES IN THE ACFT LOGBOOK CONCERNING THE REPLACEMENT OF WHEELS OR BRAKES. THE PART NUMBERS WERE VERY DIFFICULT TO READ AFTER YRS OF SVC AND THE SIMILARITY OF THE 2 DIFFERENT PART NUMBERS MADE IT THAT MUCH MORE DIFFICULT TO DETECT. SVCABLE PROPER PART NUMBER WHEEL/BRAKE ASSEMBLIES WERE LOCATED AND FORWARDED TO THE MECH WHO WAS WORKING ON THE AIRPLANE AT XXX.

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.