A B737-300 was dispatched on a maintenance ferry with the incorrect bolt installed on the nose gear ...

Attributes
ACN	657348
Time
Date	200505
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 91
Flight Phase	ground : parked ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
Experience	maintenance technician : 26
ASRS Report	657348
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 175 flight time total : 8500 flight time type : 2100
ASRS Report	657110
Events
Anomaly	aircraft equipment problem : less severe maintenance problem : improper documentation non adherence : published procedure non adherence : far
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : logbook entry performance deficiency : non compliance with legal requirements performance deficiency : installation performance deficiency : repair
Supplementary
Problem Areas	Flight Crew Human Performance Maintenance Human Performance Aircraft Chart Or Publication
Primary Problem	Maintenance Human Performance

Narrative:

I am an a&P mechanic for air carrier X. On may/tue/05; aircraft X arrived at gate Y at XA43. Its nose landing gear tow lug was found to have a broken shear bolt (right side) while in ZZZ1. The aircraft was ferried to ZZZ2 on flight X. Upon arrival; a lower grade bolt; which was undersized; was found installed on the right side of the tow lug. This was a solid low grade steel bolt instead of the hollow bac shear bolt. This was a maintenance deferral which was approved by an air carrier X line maintenance controller. The bolt was installed with a nut that was one size too large for the bolt. This work was done by a third party maintenance mechanic in ZZZ1. After the nose landing gear tow lug area was inspected and found free of damage; the proper hardware and shear bolt was procured and installed on the nose gear tow lug per maintenance manual 32-21-99. A 2 hour 34 min delay resulted.

Original NASA ASRS Text

Title: A B737-300 WAS DISPATCHED ON A MAINT FERRY WITH THE INCORRECT BOLT INSTALLED ON THE NOSE GEAR TOW LUG.

Narrative: I AM AN A&P MECH FOR ACR X. ON MAY/TUE/05; ACFT X ARRIVED AT GATE Y AT XA43. ITS NOSE LNDG GEAR TOW LUG WAS FOUND TO HAVE A BROKEN SHEAR BOLT (R SIDE) WHILE IN ZZZ1. THE ACFT WAS FERRIED TO ZZZ2 ON FLT X. UPON ARR; A LOWER GRADE BOLT; WHICH WAS UNDERSIZED; WAS FOUND INSTALLED ON THE R SIDE OF THE TOW LUG. THIS WAS A SOLID LOW GRADE STEEL BOLT INSTEAD OF THE HOLLOW BAC SHEAR BOLT. THIS WAS A MAINT DEFERRAL WHICH WAS APPROVED BY AN ACR X LINE MAINT CTLR. THE BOLT WAS INSTALLED WITH A NUT THAT WAS ONE SIZE TOO LARGE FOR THE BOLT. THIS WORK WAS DONE BY A THIRD PARTY MAINT MECH IN ZZZ1. AFTER THE NOSE LNDG GEAR TOW LUG AREA WAS INSPECTED AND FOUND FREE OF DAMAGE; THE PROPER HARDWARE AND SHEAR BOLT WAS PROCURED AND INSTALLED ON THE NOSE GEAR TOW LUG PER MAINT MANUAL 32-21-99. A 2 HR 34 MIN DELAY RESULTED.

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.

A B737-300 was dispatched on a maintenance ferry with the incorrect bolt installed on the nose gear tow lug.