Overweight takeoff on an extended overwater operation.

Attributes
ACN	186749
Time
Date	199108
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : pcc
State Reference	FO
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Heavy Transport, Low Wing, 4 Turbojet Eng
Flight Phase	climbout : takeoff ground : preflight ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 125 flight time total : 6500 flight time type : 300
ASRS Report	186759
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was acting as first officer on an international flight from jpcc to panc. Due to the length of the leg and a heavy cargo load we were faced with a maximum gross takeoff weight. The captain had reviewed the runway analysis and determined conditions were correct for takeoff. The captain concerned with a heavy takeoff, had also rereviewed the load plan. After some changes to it he supplied me with the weights and runway analysis figures to put on the weight and balance. Since we also must add 701 pounds of comat to all forms, I assumed the captain had allowed for it in his figures. After departure and reviewing trip papers to turn in, I noticed the comat did not appear to have been added. It's my belief we may have departed overweight by approximately the comat weight. To prevent this, the comat (spare parts kit) should be added to aircraft basic operating weight as crew, manuals flight kits, etc are.

Original NASA ASRS Text

Title: OVERWT TKOF ON AN EXTENDED OVERWATER OP.

Narrative: I WAS ACTING AS FO ON AN INTL FLT FROM JPCC TO PANC. DUE TO THE LENGTH OF THE LEG AND A HVY CARGO LOAD WE WERE FACED WITH A MAX GROSS TKOF WT. THE CAPT HAD REVIEWED THE RWY ANALYSIS AND DETERMINED CONDITIONS WERE CORRECT FOR TKOF. THE CAPT CONCERNED WITH A HVY TKOF, HAD ALSO REREVIEWED THE LOAD PLAN. AFTER SOME CHANGES TO IT HE SUPPLIED ME WITH THE WTS AND RWY ANALYSIS FIGURES TO PUT ON THE WT AND BAL. SINCE WE ALSO MUST ADD 701 POUNDS OF COMAT TO ALL FORMS, I ASSUMED THE CAPT HAD ALLOWED FOR IT IN HIS FIGURES. AFTER DEP AND REVIEWING TRIP PAPERS TO TURN IN, I NOTICED THE COMAT DID NOT APPEAR TO HAVE BEEN ADDED. IT'S MY BELIEF WE MAY HAVE DEPARTED OVERWT BY APPROX THE COMAT WT. TO PREVENT THIS, THE COMAT (SPARE PARTS KIT) SHOULD BE ADDED TO ACFT BASIC OPERATING WT AS CREW, MANUALS FLT KITS, ETC ARE.

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.