A beech 300 was operated in non compliance with both starter-generator units reworked using improper...

Attributes
ACN	475107
Time
Date	200006
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Super King Air 300
Operating Under FAR Part	Part 91
Flight Phase	ground : parked ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	maintenance : lead technician
Qualification	technician : powerplant technician : airframe
Experience	maintenance lead technician : 26
ASRS Report	475107
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : airframe technician : powerplant
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure
Independent Detector	other other : person 1
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : manuals contributing factor : work cards contributing factor : tooling performance deficiency : repair
Supplementary
Problem Areas	Maintenance Human Performance Company Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

During the replacement of bearings and brushes in both starter-generators, the communicator was turned down using an unapprove lathe. This lathe uses ctring cone to align the armature to the lathe. The component maintenance manual call for a tailstock adapter with a bearing. The armature fit inside the bearing to align it with the lathe. This was found by doing paperwork review. The other starter-generators of similar design and of the same manufacture does not require this adapter, only this one -- xyxx power system, mfr P/north wvx-001. The aircraft operator has been notified and is scheduled for overhaul replacement of both starter-generators. The aircraft registration is xyz serial number XXX.

Original NASA ASRS Text

Title: A BEECH 300 WAS OPERATED IN NON COMPLIANCE WITH BOTH STARTER-GENERATOR UNITS REWORKED USING IMPROPER TOOLING.

Narrative: DURING THE REPLACEMENT OF BEARINGS AND BRUSHES IN BOTH STARTER-GENERATORS, THE COMMUNICATOR WAS TURNED DOWN USING AN UNAPPROVE LATHE. THIS LATHE USES CTRING CONE TO ALIGN THE ARMATURE TO THE LATHE. THE COMPONENT MAINT MANUAL CALL FOR A TAILSTOCK ADAPTER WITH A BEARING. THE ARMATURE FIT INSIDE THE BEARING TO ALIGN IT WITH THE LATHE. THIS WAS FOUND BY DOING PAPERWORK REVIEW. THE OTHER STARTER-GENERATORS OF SIMILAR DESIGN AND OF THE SAME MANUFACTURE DOES NOT REQUIRE THIS ADAPTER, ONLY THIS ONE -- XYXX PWR SYS, MFR P/N WVX-001. THE ACFT OPERATOR HAS BEEN NOTIFIED AND IS SCHEDULED FOR OVERHAUL REPLACEMENT OF BOTH STARTER-GENERATORS. THE ACFT REGISTRATION IS XYZ SERIAL NUMBER XXX.

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.

A beech 300 was operated in non compliance with both starter-generator units reworked using improper tooling.