The flight crew discovers they have been using a weight and balance trim sheet for another aircraft.

Attributes
ACN	319394
Time
Date	199510
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : msp
State Reference	MN
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 135
Flight Phase	ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	other other : other pilot : cfi pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 270 flight time total : 3100 flight time type : 1100
ASRS Report	319394
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : published procedure non adherence : far other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Chart Or Publication
Air Traffic Incident	Pilot Deviation other

Narrative:

After flying aircraft nxxa for approximately 4-6 legs on dates oct/xa/95 and oct/xb/95, it was discovered by another crew that the trim sheet that we use for computing center of gravity limits and seat blocking was incorrect. The aircraft xxa was recently weighed (either that day or a day or two before), and the paperwork for xxb was put in xxa book and clipboard. We use a photocopy of the trim sheet in the book and put it on the clipboard so we don't have to dig into the books every time we do a load manifest. During the time we used the improper trim sheet for xxa, I do not believe that we exceeded any certification limitation in either weight or center of gravity. I do not believe that safety was compromised at all. Our normal procedure during a preflight is to verify that the photocopied trim sheet on the clipboard matches the one in the aircraft book, which they did. It was our error that we did not take it one step further and read the fine print and see that the document pertained to the correct tail number.

Original NASA ASRS Text

Title: THE FLC DISCOVERS THEY HAVE BEEN USING A WT AND BAL TRIM SHEET FOR ANOTHER ACFT.

Narrative: AFTER FLYING ACFT NXXA FOR APPROX 4-6 LEGS ON DATES OCT/XA/95 AND OCT/XB/95, IT WAS DISCOVERED BY ANOTHER CREW THAT THE TRIM SHEET THAT WE USE FOR COMPUTING CTR OF GRAVITY LIMITS AND SEAT BLOCKING WAS INCORRECT. THE ACFT XXA WAS RECENTLY WEIGHED (EITHER THAT DAY OR A DAY OR TWO BEFORE), AND THE PAPERWORK FOR XXB WAS PUT IN XXA BOOK AND CLIPBOARD. WE USE A PHOTOCOPY OF THE TRIM SHEET IN THE BOOK AND PUT IT ON THE CLIPBOARD SO WE DON'T HAVE TO DIG INTO THE BOOKS EVERY TIME WE DO A LOAD MANIFEST. DURING THE TIME WE USED THE IMPROPER TRIM SHEET FOR XXA, I DO NOT BELIEVE THAT WE EXCEEDED ANY CERTIFICATION LIMITATION IN EITHER WT OR CTR OF GRAVITY. I DO NOT BELIEVE THAT SAFETY WAS COMPROMISED AT ALL. OUR NORMAL PROC DURING A PREFLT IS TO VERIFY THAT THE PHOTOCOPIED TRIM SHEET ON THE CLIPBOARD MATCHES THE ONE IN THE ACFT BOOK, WHICH THEY DID. IT WAS OUR ERROR THAT WE DID NOT TAKE IT ONE STEP FURTHER AND READ THE FINE PRINT AND SEE THAT THE DOCUMENT PERTAINED TO THE CORRECT TAIL NUMBER.

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.