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After instructing a maintenance technician to relamp a mode control panel on a B757-200 using the mode control display panel per MM 22-11-0; a lead mechanic learns a different MM requires a CAT-3 check when replacing a command switch.
| Attributes | |
| ACN | 808380 |
| Time | |
| Date | 200808 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : lead technician |
| ASRS Report | 808380 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : far non adherence : published procedure |
| Independent Detector | other other : 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : briefing contributing factor : manuals performance deficiency : logbook entry performance deficiency : testing performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft Chart Or Publication |
| Primary Problem | Chart Or Publication |
Narrative:
I instructed amt to relamp MCP and acp test 4 using mcdp per MM22-11-02. I learned later that a different maintenance manual requires a CAT III check if replacing a command switch. A CAT III check was not accomplished. Add a note in the maintenance manual 22-11-02 stating that a command switch requires a CAT III check.
Original NASA ASRS Text
Title: AFTER INSTRUCTING A MAINTENANCE TECHNICIAN TO RELAMP A MODE CONTROL PANEL ON A B757-200 USING THE MODE CONTROL DISPLAY PANEL PER MM 22-11-0; A LEAD MECHANIC LEARNS A DIFFERENT MM REQUIRES A CAT-3 CHECK WHEN REPLACING A COMMAND SWITCH.
Narrative: I INSTRUCTED AMT TO RELAMP MCP AND ACP TEST 4 USING MCDP PER MM22-11-02. I LEARNED LATER THAT A DIFFERENT MAINT MANUAL REQUIRES A CAT III CHK IF REPLACING A COMMAND SWITCH. A CAT III CHK WAS NOT ACCOMPLISHED. ADD A NOTE IN THE MAINT MANUAL 22-11-02 STATING THAT A COMMAND SWITCH REQUIRES A CAT III CHK.
Data retrieved from NASA's ASRS site as of May 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.