Failure main gear tire causes crew to review takeoff data. Flight crew discovers takeoff was made ab...

Attributes
ACN	669956
Time
Date	200508
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 145 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	ground : takeoff roll ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	669956
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	669957
Events
Anomaly	aircraft equipment problem : critical non adherence : far non adherence : company policies non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : landed in emergency condition flight crew : landed as precaution flight crew : declared emergency
Consequence	other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance Company
Primary Problem	Ambiguous

Narrative:

Departing ZZZ the aircraft started a moderate vibration at rotation. Believing we blew a nosewheel tire; we elected to leave the gear down. After following aom vol I checklists; we contacted system operations center/maintenance operations center for further input. During our fuel/time calculations to figure out approximately how long it would take to get under our landing weight; it was discovered that we had unintentionally and accidentally departed ZZZ over our zero fuel weight (ZFW). ATC advised us that an inspection turned up tire debris on the departure runway. After burning the required fuel; we declared an emergency and returned to ZZZ without further incident. After landing; we found the left main inboard (#2) tire had failed. Although these two events (tire malfunction/over ZFW) happened on the same flight; the mzfw issue had nothing to do with the tire malfunction. This is due to the fact that the tire is rated above 48501 pounds and during no time did we exceed mtow or mlw. Both were considerably lower. Be more aware of loading that can cause a flight to exceed ZFW. Program to FMS fuel page to turn the ZFW to a different color or have it flash when it is exceeded for that aircraft type.

Original NASA ASRS Text

Title: FAILURE MAIN GEAR TIRE CAUSES CREW TO REVIEW TKOF DATA. FLT CREW DISCOVERS TKOF WAS MADE ABOVE MZFW.

Narrative: DEPARTING ZZZ THE ACFT STARTED A MODERATE VIBRATION AT ROTATION. BELIEVING WE BLEW A NOSEWHEEL TIRE; WE ELECTED TO LEAVE THE GEAR DOWN. AFTER FOLLOWING AOM VOL I CHKLISTS; WE CONTACTED SYS OPS CTR/MAINT OPS CTR FOR FURTHER INPUT. DURING OUR FUEL/TIME CALCULATIONS TO FIGURE OUT APPROX HOW LONG IT WOULD TAKE TO GET UNDER OUR LNDG WEIGHT; IT WAS DISCOVERED THAT WE HAD UNINTENTIONALLY AND ACCIDENTALLY DEPARTED ZZZ OVER OUR ZERO FUEL WT (ZFW). ATC ADVISED US THAT AN INSPECTION TURNED UP TIRE DEBRIS ON THE DEP RWY. AFTER BURNING THE REQUIRED FUEL; WE DECLARED AN EMER AND RETURNED TO ZZZ WITHOUT FURTHER INCIDENT. AFTER LNDG; WE FOUND THE L MAIN INBOARD (#2) TIRE HAD FAILED. ALTHOUGH THESE TWO EVENTS (TIRE MALFUNCTION/OVER ZFW) HAPPENED ON THE SAME FLT; THE MZFW ISSUE HAD NOTHING TO DO WITH THE TIRE MALFUNCTION. THIS IS DUE TO THE FACT THAT THE TIRE IS RATED ABOVE 48501 LBS AND DURING NO TIME DID WE EXCEED MTOW OR MLW. BOTH WERE CONSIDERABLY LOWER. BE MORE AWARE OF LOADING THAT CAN CAUSE A FLT TO EXCEED ZFW. PROGRAM TO FMS FUEL PAGE TO TURN THE ZFW TO A DIFFERENT COLOR OR HAVE IT FLASH WHEN IT IS EXCEEDED FOR THAT ACFT TYPE.

Data retrieved from NASA's ASRS site as of January 2009 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.

Failure main gear tire causes crew to review takeoff data. Flight crew discovers takeoff was made above mzfw.