A B737-800 was dispatched with both B737-700 nose tire and wheel assemblies installed.

Attributes
ACN	700277
Time
Date	200606
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
Experience	maintenance technician : 17
ASRS Report	700277
Person 2
Affiliation	company : air carrier
Function	other personnel other
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : published procedure non adherence : far
Independent Detector	other other : 2
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : inspection performance deficiency : installation performance deficiency : scheduled maintenance performance deficiency : non compliance with legal requirements performance deficiency : logbook entry
Supplementary
Problem Areas	Aircraft Chart Or Publication Environmental Factor Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

On jun/thu/06; at XA00 hours I was assigned to air carrier X which was in atlanta; GA; for scheduled maintenance. There were 2 maintenance carryovers on the nose tires that were showing cord. Wheel assemblies were to be replaced. I went into the breezeway directly in front and found 2 737N tires located against breezeway wall. Wall labeled 737N. I looked at the parts tag manufacturer part number idented tire as B737N. I rolled both tires to front of aircraft. I proceeded to jack aircraft and removed both tires at once; then installed both tires at same time. Never having the tires close enough to each other to ever notice a difference; and since part number labeled B737N was on serviceable parts tag. Callback conversation with reporter revealed the following information: the reporter stated he noted the parts tag idented the tire and wheel assemblies as 737N. This idented the assemblies as B737 nose tires and wheel assemblies but not model number. The reporter did not take the time to ensure the wheel and tire assemblies were for a B737-800.

Original NASA ASRS Text

Title: A B737-800 WAS DISPATCHED WITH BOTH B737-700 NOSE TIRE AND WHEEL ASSEMBLIES INSTALLED.

Narrative: ON JUN/THU/06; AT XA00 HRS I WAS ASSIGNED TO ACR X WHICH WAS IN ATLANTA; GA; FOR SCHEDULED MAINT. THERE WERE 2 MAINT CARRYOVERS ON THE NOSE TIRES THAT WERE SHOWING CORD. WHEEL ASSEMBLIES WERE TO BE REPLACED. I WENT INTO THE BREEZEWAY DIRECTLY IN FRONT AND FOUND 2 737N TIRES LOCATED AGAINST BREEZEWAY WALL. WALL LABELED 737N. I LOOKED AT THE PARTS TAG MANUFACTURER PART NUMBER IDENTED TIRE AS B737N. I ROLLED BOTH TIRES TO FRONT OF ACFT. I PROCEEDED TO JACK ACFT AND REMOVED BOTH TIRES AT ONCE; THEN INSTALLED BOTH TIRES AT SAME TIME. NEVER HAVING THE TIRES CLOSE ENOUGH TO EACH OTHER TO EVER NOTICE A DIFFERENCE; AND SINCE PART NUMBER LABELED B737N WAS ON SERVICEABLE PARTS TAG. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED HE NOTED THE PARTS TAG IDENTED THE TIRE AND WHEEL ASSEMBLIES AS 737N. THIS IDENTED THE ASSEMBLIES AS B737 NOSE TIRES AND WHEEL ASSEMBLIES BUT NOT MODEL NUMBER. THE RPTR DID NOT TAKE THE TIME TO ENSURE THE WHEEL AND TIRE ASSEMBLIES WERE FOR A B737-800.

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.