A BE20 cpr pilot flies 2 legs with improper documentation, failing to adhere to his aircraft's maxim...

Attributes
ACN	571605
Time
Date	200301
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : olm.airport
State Reference	WA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	other
Make Model Name	Super King Air 200 HDC
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	government other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 90 flight time total : 7000 flight time type : 550
ASRS Report	571605
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	non adherence : far non adherence : company policies non adherence other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance Passenger Human Performance Company Aircraft
Primary Problem	Flight Crew Human Performance

Narrative:

On jan/fri/03 at approximately XA30 hours, I departed the olm airport with 9 passenger and full main fuel tanks en route to bfi. Prior to departure, I mentally calculated that the airplane was below maximum zero fuel weight and maximum takeoff weight using a standard passenger weight of 175 pounds. Due to the late arrival of some passenger, I kept cruise power at a higher than normal fuel burn rate. We landed at bfi approximately 30 mins later. We departed bfi at approximately XD30 en route to olm with 1 additional passenger, the same date. We landed at olm approximately 30 mins later. 1 week later, it was brought to my attention by another pilot that I may have exceeded the maximum zero fuel weight and/or maximum takeoff weight for the airplane. I performed the calculations using an electronic calculator and actual passenger weights and discovered that I had made an error in the zero fuel weight and takeoff weight for both departures and arrs. This error was caused by performing a mental calculation using a standard passenger weight of 175 pounds as opposed to using an electronic calculator and actual passenger weights. I have since calculated several possible passenger configns (not using standard 175 pound weights) and come up with different zero fuel weight and takeoff weight figures depending upon actual passenger weights used.

Original NASA ASRS Text

Title: A BE20 CPR PLT FLIES 2 LEGS WITH IMPROPER DOCUMENTATION, FAILING TO ADHERE TO HIS ACFT'S MAX ZERO FUEL WT AND MAX TKOF WT RESTRS FROM OLM, WA.

Narrative: ON JAN/FRI/03 AT APPROX XA30 HRS, I DEPARTED THE OLM ARPT WITH 9 PAX AND FULL MAIN FUEL TANKS ENRTE TO BFI. PRIOR TO DEP, I MENTALLY CALCULATED THAT THE AIRPLANE WAS BELOW MAX ZERO FUEL WT AND MAX TKOF WT USING A STANDARD PAX WT OF 175 LBS. DUE TO THE LATE ARR OF SOME PAX, I KEPT CRUISE PWR AT A HIGHER THAN NORMAL FUEL BURN RATE. WE LANDED AT BFI APPROX 30 MINS LATER. WE DEPARTED BFI AT APPROX XD30 ENRTE TO OLM WITH 1 ADDITIONAL PAX, THE SAME DATE. WE LANDED AT OLM APPROX 30 MINS LATER. 1 WK LATER, IT WAS BROUGHT TO MY ATTN BY ANOTHER PLT THAT I MAY HAVE EXCEEDED THE MAX ZERO FUEL WT AND/OR MAX TKOF WT FOR THE AIRPLANE. I PERFORMED THE CALCULATIONS USING AN ELECTRONIC CALCULATOR AND ACTUAL PAX WTS AND DISCOVERED THAT I HAD MADE AN ERROR IN THE ZERO FUEL WT AND TKOF WT FOR BOTH DEPS AND ARRS. THIS ERROR WAS CAUSED BY PERFORMING A MENTAL CALCULATION USING A STANDARD PAX WT OF 175 LBS AS OPPOSED TO USING AN ELECTRONIC CALCULATOR AND ACTUAL PAX WTS. I HAVE SINCE CALCULATED SEVERAL POSSIBLE PAX CONFIGNS (NOT USING STANDARD 175 LB WTS) AND COME UP WITH DIFFERENT ZERO FUEL WT AND TKOF WT FIGURES DEPENDING UPON ACTUAL PAX WTS USED.

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.

A BE20 cpr pilot flies 2 legs with improper documentation, failing to adhere to his aircraft's maximum zero fuel weight and maximum takeoff weight restrs from olm, wa.