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An engine shop technician reports company added steps for heat treating engine components in conflict with the manufacturer's maintenance manual.
| Attributes | |
| ACN | 470770 |
| Time | |
| Date | 200004 |
| Day | Thu |
| 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 | |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance technician : 25 |
| Person 2 | |
| Affiliation | government : faa |
| Function | observation : air carrier inspector |
| Qualification | technician : powerplant technician : airframe |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance 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 : engineering procedure performance deficiency : non compliance with legal requirements performance deficiency : scheduled maintenance |
| Supplementary | |
| Problem Areas | Company Maintenance Human Performance |
| Primary Problem | Company |
Narrative:
Procedure in engine overhaul program was changed without the principal maintenance inspector's knowledge or being informed. Discovered quite by accident. Step was added to bake certain parts after plating these parts. Do not allow baking notes in pratt & whitney maintenance manual part number XXXX of affected air transport association sections warn against plating. I have caught some parts that have 'fell out,' but have no way to know if any parts have been ruined yet.
Original NASA ASRS Text
Title: AN ENG SHOP TECHNICIAN RPTS COMPANY ADDED STEPS FOR HEAT TREATING ENG COMPONENTS IN CONFLICT WITH THE MANUFACTURER'S MAINT MANUAL.
Narrative: PROC IN ENG OVERHAUL PROGRAM WAS CHANGED WITHOUT THE PRINCIPAL MAINT INSPECTOR'S KNOWLEDGE OR BEING INFORMED. DISCOVERED QUITE BY ACCIDENT. STEP WAS ADDED TO BAKE CERTAIN PARTS AFTER PLATING THESE PARTS. DO NOT ALLOW BAKING NOTES IN PRATT & WHITNEY MAINT MANUAL PART NUMBER XXXX OF AFFECTED AIR TRANSPORT ASSOCIATION SECTIONS WARN AGAINST PLATING. I HAVE CAUGHT SOME PARTS THAT HAVE 'FELL OUT,' BUT HAVE NO WAY TO KNOW IF ANY PARTS HAVE BEEN RUINED YET.
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.