A DC9 was dispatched with the #2 main tire and wheel assembly incorrectly installed.

Attributes
ACN	377166
Time
Date	199708
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Dusk
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	DC-9 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	377166
Person 2
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	377644
Events
Anomaly	aircraft equipment problem : critical non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	none taken : detected after the fact other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Air carrier aircraft arrived at ZZZ on flight abc at approximately XA10 aug/xx/97. Aircraft blew #2 main tire on landing at ZZZ. Aircraft taxi to gate. I, as a maintenance crew chief, had gate mechanic on gate remove and replace #2 and #1 main tires. #2 tire had skid mark that had gone through all layers of tread. My crew changed the tires per DC9 maintenance manual. We failed to position the axle nut spacer per the maintenance manual. The mechanics working for me were new mechanics. Both had less than a yr time with air carrier. I was overseeing their work. I failed to find the problem. We installed the tire, torque the tire to the right torque, safety locking screws, installed hub cap. We then replaced the #1 tire with no problems. We performed an anti-skid check and replaced a skid control box. Flight was dispatched. The next day after several lndgs while aircraft was taxiing out for flight, wheel nut came loose. The hub cap was broken off, tire was loose on the axle. Aircraft was towed back to gate with tire removed. On inspection, wheel nut and spacer had come loose. The #2 brake was replaced with new tire on #2 and #1 position. Aircraft has flown several flts with no further problems. The way we work at air carrier in ZZZ is each crew chief has 5-7 gates with 5-7 mechanics on gates. I have 7 gates with a mechanic on each gate. That night I was very busy on all gates with no help from other crews. I was with the 2 mechanics on the tire change as much as possible. They both had no training on DC9 aircraft, just what they can get while working with other mechanics or with me. I have had training on DC9 aircraft. I have 31 yrs at air carrier. All the time is working on line position, including 4 yrs as a supervisor over line crews.

Original NASA ASRS Text

Title: A DC9 WAS DISPATCHED WITH THE #2 MAIN TIRE AND WHEEL ASSEMBLY INCORRECTLY INSTALLED.

Narrative: ACR ACFT ARRIVED AT ZZZ ON FLT ABC AT APPROX XA10 AUG/XX/97. ACFT BLEW #2 MAIN TIRE ON LNDG AT ZZZ. ACFT TAXI TO GATE. I, AS A MAINT CREW CHIEF, HAD GATE MECH ON GATE REMOVE AND REPLACE #2 AND #1 MAIN TIRES. #2 TIRE HAD SKID MARK THAT HAD GONE THROUGH ALL LAYERS OF TREAD. MY CREW CHANGED THE TIRES PER DC9 MAINT MANUAL. WE FAILED TO POS THE AXLE NUT SPACER PER THE MAINT MANUAL. THE MECHS WORKING FOR ME WERE NEW MECHS. BOTH HAD LESS THAN A YR TIME WITH ACR. I WAS OVERSEEING THEIR WORK. I FAILED TO FIND THE PROB. WE INSTALLED THE TIRE, TORQUE THE TIRE TO THE RIGHT TORQUE, SAFETY LOCKING SCREWS, INSTALLED HUB CAP. WE THEN REPLACED THE #1 TIRE WITH NO PROBS. WE PERFORMED AN ANTI-SKID CHK AND REPLACED A SKID CTL BOX. FLT WAS DISPATCHED. THE NEXT DAY AFTER SEVERAL LNDGS WHILE ACFT WAS TAXIING OUT FOR FLT, WHEEL NUT CAME LOOSE. THE HUB CAP WAS BROKEN OFF, TIRE WAS LOOSE ON THE AXLE. ACFT WAS TOWED BACK TO GATE WITH TIRE REMOVED. ON INSPECTION, WHEEL NUT AND SPACER HAD COME LOOSE. THE #2 BRAKE WAS REPLACED WITH NEW TIRE ON #2 AND #1 POS. ACFT HAS FLOWN SEVERAL FLTS WITH NO FURTHER PROBS. THE WAY WE WORK AT ACR IN ZZZ IS EACH CREW CHIEF HAS 5-7 GATES WITH 5-7 MECHS ON GATES. I HAVE 7 GATES WITH A MECH ON EACH GATE. THAT NIGHT I WAS VERY BUSY ON ALL GATES WITH NO HELP FROM OTHER CREWS. I WAS WITH THE 2 MECHS ON THE TIRE CHANGE AS MUCH AS POSSIBLE. THEY BOTH HAD NO TRAINING ON DC9 ACFT, JUST WHAT THEY CAN GET WHILE WORKING WITH OTHER MECHS OR WITH ME. I HAVE HAD TRAINING ON DC9 ACFT. I HAVE 31 YRS AT ACR. ALL THE TIME IS WORKING ON LINE POS, INCLUDING 4 YRS AS A SUPVR OVER LINE CREWS.

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.